X11-like Phosphotyrosine-binding (PTB) domain; The function of the neuronal protein X11 is unknown to date. X11 has a PTB domain followed by two PDZ domains. PTB domains have a common PH-like fold and are found in various eukaryotic signaling molecules. This domain was initially shown to binds peptides with a NPXY motif with differing requirements for phosphorylation of the tyrosine, although more recent studies have found that some types of PTB domains can bind to peptides lack tyrosine residues altogether. In contrast to SH2 domains, which recognize phosphotyrosine and adjacent carboxy-terminal residues, PTB-domain binding specificity is conferred by residues amino-terminal to the phosphotyrosine. PTB domains are classified into three groups: phosphotyrosine-dependent Shc-like, phosphotyrosine-dependent IRS-like, and phosphotyrosine-independent Dab-like PTB domains. This cd is part of the Dab-like subgroup.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 452 PEDLIDGIIFAANYLGSTQLLSDKTPSKNVRMMQAQEAVSRIKAPEGESQPMTEVDLFISTQRIKVLNADTQETMMDHPL 531
Cdd:cd01208    1 PEDLIDGVIFGANYLGSTQLLSERNPSKNVRMAQAQEAVSRVKAPEGESQPSTEVDLFISTERIKVLNADTQETMMDHAL 80

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 532 RTISYIADIGNIVVLMARRRMPRSNSQENVEASHPSQDGKRQYKMICHVFESEDAQLIAQSIGQAFSVAYQEFLRANGIN 611
Cdd:cd01208   81 RTISYIADIGNIVVLMARRRMPRSSSQECVETTPPSQEGKRQYKMICHVFESEDAQLIAQSIGQAFSVAYQEFLRANGIN 160

                 .
gi 530391075 612 P 612
Cdd:cd01208  161 P 161

PDZ domain 2 of amyloid-beta A4 precursor protein-binding family A member 1 (APBA1), APBA2, APBA3, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 2 of APBA1, APBA2, APBA3, and related domains. The APBA/X11/Mint protein family includes three members: neuron specific APBA1 (also known as X11alpha and Mint1) and APBA2 (also known as X11beta and Mint2), and the ubiquitously expressed APBA3 (also known as X12gamma and Mint3). They are involved in regulating neuronal signaling, trafficking, and plasticity. They contain two PDZ domains (PDZ1 and PDZ2) which bind a variety of proteins: Arf GTPases (APBA1 and APBA2 PDZ2) and neurexin (APBA1 and APBA2 PDZ1 and 2) which are involved in vesicle docking and exocytosis; alpha1B subunit of N-type Ca2+ channel (APBA1 PDZ1) that is involved in ion channels; KIF17 (APBA1 PDZ1) that is involved in transport and traffic; and Alzheimer's disease related proteins, APP (APBA3 PDZ2), CCS (APBA1 PDZ2), NF-kappa-B/p65 (APBA2 PDZ2), presenilin-1 (APBA1 and APBA2 PDZ1 and PDZ2). PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This APBA1,3-like family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged as beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 530391075 733 PVTTVLIRRPDLRYQLGFSVQNGIICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVHILSNAVGEIHMKTMP 810
Cdd:cd06793    1 PVTTVLIRRPDLKYQLGFSVQNGIICSLLRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVQLLSNSVGEIHMKTMP 78

X11-like Phosphotyrosine-binding (PTB) domain; The function of the neuronal protein X11 is unknown to date. X11 has a PTB domain followed by two PDZ domains. PTB domains have a common PH-like fold and are found in various eukaryotic signaling molecules. This domain was initially shown to binds peptides with a NPXY motif with differing requirements for phosphorylation of the tyrosine, although more recent studies have found that some types of PTB domains can bind to peptides lack tyrosine residues altogether. In contrast to SH2 domains, which recognize phosphotyrosine and adjacent carboxy-terminal residues, PTB-domain binding specificity is conferred by residues amino-terminal to the phosphotyrosine. PTB domains are classified into three groups: phosphotyrosine-dependent Shc-like, phosphotyrosine-dependent IRS-like, and phosphotyrosine-independent Dab-like PTB domains. This cd is part of the Dab-like subgroup.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 452 PEDLIDGIIFAANYLGSTQLLSDKTPSKNVRMMQAQEAVSRIKAPEGESQPMTEVDLFISTQRIKVLNADTQETMMDHPL 531
Cdd:cd01208    1 PEDLIDGVIFGANYLGSTQLLSERNPSKNVRMAQAQEAVSRVKAPEGESQPSTEVDLFISTERIKVLNADTQETMMDHAL 80

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 532 RTISYIADIGNIVVLMARRRMPRSNSQENVEASHPSQDGKRQYKMICHVFESEDAQLIAQSIGQAFSVAYQEFLRANGIN 611
Cdd:cd01208   81 RTISYIADIGNIVVLMARRRMPRSSSQECVETTPPSQEGKRQYKMICHVFESEDAQLIAQSIGQAFSVAYQEFLRANGIN 160

                 .
gi 530391075 612 P 612
Cdd:cd01208  161 P 161

PDZ domain 2 of amyloid-beta A4 precursor protein-binding family A member 1 (APBA1), APBA2, APBA3, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 2 of APBA1, APBA2, APBA3, and related domains. The APBA/X11/Mint protein family includes three members: neuron specific APBA1 (also known as X11alpha and Mint1) and APBA2 (also known as X11beta and Mint2), and the ubiquitously expressed APBA3 (also known as X12gamma and Mint3). They are involved in regulating neuronal signaling, trafficking, and plasticity. They contain two PDZ domains (PDZ1 and PDZ2) which bind a variety of proteins: Arf GTPases (APBA1 and APBA2 PDZ2) and neurexin (APBA1 and APBA2 PDZ1 and 2) which are involved in vesicle docking and exocytosis; alpha1B subunit of N-type Ca2+ channel (APBA1 PDZ1) that is involved in ion channels; KIF17 (APBA1 PDZ1) that is involved in transport and traffic; and Alzheimer's disease related proteins, APP (APBA3 PDZ2), CCS (APBA1 PDZ2), NF-kappa-B/p65 (APBA2 PDZ2), presenilin-1 (APBA1 and APBA2 PDZ1 and PDZ2). PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This APBA1,3-like family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged as beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 530391075 733 PVTTVLIRRPDLRYQLGFSVQNGIICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVHILSNAVGEIHMKTMP 810
Cdd:cd06793    1 PVTTVLIRRPDLKYQLGFSVQNGIICSLLRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVQLLSNSVGEIHMKTMP 78

CASK/Lin-2 interaction domain (CID) of Mint1 and similar proteins; Mint1, also called amyloid-beta A4 precursor protein-binding family A member 1 (Apba1), or adapter protein X11alpha, or neuron-specific X11 protein, or neuronal Munc18-1-interacting protein 1, functions in synaptic vesicle exocytosis by binding to Munc18-1, an essential component of the synaptic vesicle exocytotic machinery. It may modulate processing of the amyloid-beta precursor protein (APP) and hence formation of APP-beta. Mint1 is a component of the brain-specific heterotrimeric complex (LIN-10-LIN-2-LIN-7 complex), which associates with the motor protein KIF17 to transport vesicles containing N-methyl-D-aspartate (NMDA) receptor subunit NR2B along microtubules. It is also part of a multimeric complex containing Munc18-1 and syntaxin-1. The model corresponds to a conserved CASK/Lin-2 interaction domain (CID) of Mint1, which is responsible for CASK binding.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*.
gi 530391075 343 RDAISLAIKDIKEAIEEVKTRTIRSPYTPDEPKEPIWVMRQDISPT 388
Cdd:cd22578    1 RDAISLAIKDIKEAIEEVKTRTIRSPYTPDEPKEPIWVMRQDISPT 46

PDZ domain; PDZ domains are found in diverse signaling proteins.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075  645 DVFIEKQKGEILGVVIVESGWGSIlPTVIIANMMHGGPAEKSGkLNIGDQIMSINGTSLVGLPLSTCQSIIKGLKnqSRV 724
Cdd:pfam00595   1 QVTLEKDGRGGLGFSLKGGSDQGD-PGIFVSEVLPGGAAEAGG-LKVGDRILSINGQDVENMTHEEAVLALKGSG--GKV 76

                  ....
gi 530391075  725 KLNI 728
Cdd:pfam00595  77 TLTI 80

Domain present in PSD-95, Dlg, and ZO-1/2; Also called DHR (Dlg homologous region) or GLGF (relatively well conserved tetrapeptide in these domains). Some PDZs have been shown to bind C-terminal polypeptides; others appear to bind internal (non-C-terminal) polypeptides. Different PDZs possess different binding specificities.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075   736 TVLIRRPDLryQLGFSVQNG-------IICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVHILSNAVGEIHMKT 808
Cdd:smart00228   4 LVELEKGGG--GLGFSLVGGkdegggvVVSSVVPGSPAAKAGLRVGDVILEVNGTSVEGLTHLEAVDLLKKAGGKVTLTV 81

                   ..
gi 530391075   809 MP 810
Cdd:smart00228  82 LR 83

C-terminal processing protease CtpA/Prc, contains a PDZ domain [Posttranslational modification, protein turnover, chaperones];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 617 QKEYSDLLNTQDMYNDDL---------IH---FSKSEncKDVFIEKQKGEI--LGVVI-VESGwgsilpTVIIANMMHGG 681
Cdd:COG0793   11 RDNYVDEYDDRDLAEGALngmlgelgdPHsyyLDPEE--YEDFQESTSGEFggLGAELgEEDG------KVVVVSVIPGS 82

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 530391075 682 PAEKSGkLNIGDQIMSINGTSLVGLPLSTCQSIIKGLKNqSRVKLNIVRCP---PVTTVLIRR 741
Cdd:COG0793   83 PAEKAG-IKPGDIILAIDGKSVAGLTLDDAVKLLRGKAG-TKVTLTIKRPGegePITVTLTRA 143

X11-like Phosphotyrosine-binding (PTB) domain; The function of the neuronal protein X11 is unknown to date. X11 has a PTB domain followed by two PDZ domains. PTB domains have a common PH-like fold and are found in various eukaryotic signaling molecules. This domain was initially shown to binds peptides with a NPXY motif with differing requirements for phosphorylation of the tyrosine, although more recent studies have found that some types of PTB domains can bind to peptides lack tyrosine residues altogether. In contrast to SH2 domains, which recognize phosphotyrosine and adjacent carboxy-terminal residues, PTB-domain binding specificity is conferred by residues amino-terminal to the phosphotyrosine. PTB domains are classified into three groups: phosphotyrosine-dependent Shc-like, phosphotyrosine-dependent IRS-like, and phosphotyrosine-independent Dab-like PTB domains. This cd is part of the Dab-like subgroup.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 452 PEDLIDGIIFAANYLGSTQLLSDKTPSKNVRMMQAQEAVSRIKAPEGESQPMTEVDLFISTQRIKVLNADTQETMMDHPL 531
Cdd:cd01208    1 PEDLIDGVIFGANYLGSTQLLSERNPSKNVRMAQAQEAVSRVKAPEGESQPSTEVDLFISTERIKVLNADTQETMMDHAL 80

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 532 RTISYIADIGNIVVLMARRRMPRSNSQENVEASHPSQDGKRQYKMICHVFESEDAQLIAQSIGQAFSVAYQEFLRANGIN 611
Cdd:cd01208   81 RTISYIADIGNIVVLMARRRMPRSSSQECVETTPPSQEGKRQYKMICHVFESEDAQLIAQSIGQAFSVAYQEFLRANGIN 160

                 .
gi 530391075 612 P 612
Cdd:cd01208  161 P 161

PDZ domain 2 of amyloid-beta A4 precursor protein-binding family A member 1 (APBA1), APBA2, APBA3, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 2 of APBA1, APBA2, APBA3, and related domains. The APBA/X11/Mint protein family includes three members: neuron specific APBA1 (also known as X11alpha and Mint1) and APBA2 (also known as X11beta and Mint2), and the ubiquitously expressed APBA3 (also known as X12gamma and Mint3). They are involved in regulating neuronal signaling, trafficking, and plasticity. They contain two PDZ domains (PDZ1 and PDZ2) which bind a variety of proteins: Arf GTPases (APBA1 and APBA2 PDZ2) and neurexin (APBA1 and APBA2 PDZ1 and 2) which are involved in vesicle docking and exocytosis; alpha1B subunit of N-type Ca2+ channel (APBA1 PDZ1) that is involved in ion channels; KIF17 (APBA1 PDZ1) that is involved in transport and traffic; and Alzheimer's disease related proteins, APP (APBA3 PDZ2), CCS (APBA1 PDZ2), NF-kappa-B/p65 (APBA2 PDZ2), presenilin-1 (APBA1 and APBA2 PDZ1 and PDZ2). PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This APBA1,3-like family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged as beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 530391075 733 PVTTVLIRRPDLRYQLGFSVQNGIICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVHILSNAVGEIHMKTMP 810
Cdd:cd06793    1 PVTTVLIRRPDLKYQLGFSVQNGIICSLLRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVQLLSNSVGEIHMKTMP 78

CASK/Lin-2 interaction domain (CID) of Mint1 and similar proteins; Mint1, also called amyloid-beta A4 precursor protein-binding family A member 1 (Apba1), or adapter protein X11alpha, or neuron-specific X11 protein, or neuronal Munc18-1-interacting protein 1, functions in synaptic vesicle exocytosis by binding to Munc18-1, an essential component of the synaptic vesicle exocytotic machinery. It may modulate processing of the amyloid-beta precursor protein (APP) and hence formation of APP-beta. Mint1 is a component of the brain-specific heterotrimeric complex (LIN-10-LIN-2-LIN-7 complex), which associates with the motor protein KIF17 to transport vesicles containing N-methyl-D-aspartate (NMDA) receptor subunit NR2B along microtubules. It is also part of a multimeric complex containing Munc18-1 and syntaxin-1. The model corresponds to a conserved CASK/Lin-2 interaction domain (CID) of Mint1, which is responsible for CASK binding.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*.
gi 530391075 343 RDAISLAIKDIKEAIEEVKTRTIRSPYTPDEPKEPIWVMRQDISPT 388
Cdd:cd22578    1 RDAISLAIKDIKEAIEEVKTRTIRSPYTPDEPKEPIWVMRQDISPT 46

Phosphotyrosine-binding (PTB) PH-like fold; PTB domains have a common PH-like fold and are found in various eukaryotic signaling molecules. This domain was initially shown to bind peptides with a NPXY motif with differing requirements for phosphorylation of the tyrosine, although more recent studies have found that some types of PTB domains can bind to peptides lack tyrosine residues altogether. In contrast to SH2 domains, which recognize phosphotyrosine and adjacent carboxy-terminal residues, PTB-domain binding specificity is conferred by residues amino-terminal to the phosphotyrosine. PTB domains are classified into three groups: phosphotyrosine-dependent Shc-like, phosphotyrosine-dependent IRS-like, and phosphotyrosine-independent Dab-like PTB domains.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 459 IIFAANYLGSTQLLSDKTPsknvrMMQAQEAVSRIKAPEGESQPMTEVDLFISTQRIKVLNADTQETMMDHPLRTISYIA 538
Cdd:cd00934    1 ASFQVKYLGSVEVGSSRGV-----DVVEEALKALAAALKSSKRKPGPVLLEVSSKGVKLLDLDTKELLLRHPLHRISYCG 75

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 530391075 539 DIG---NIVVLMARRrmprsnsqenveashpsqdgKRQYKMICHVFESED---AQLIAQSIGQAF 597
Cdd:cd00934   76 RDPdnpNVFAFIAGE--------------------EGGSGFRCHVFQCEDeeeAEEILQAIGQAF 120

PDZ domain; PDZ domains are found in diverse signaling proteins.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075  645 DVFIEKQKGEILGVVIVESGWGSIlPTVIIANMMHGGPAEKSGkLNIGDQIMSINGTSLVGLPLSTCQSIIKGLKnqSRV 724
Cdd:pfam00595   1 QVTLEKDGRGGLGFSLKGGSDQGD-PGIFVSEVLPGGAAEAGG-LKVGDRILSINGQDVENMTHEEAVLALKGSG--GKV 76

                  ....
gi 530391075  725 KLNI 728
Cdd:pfam00595  77 TLTI 80

PDZ domain; PDZ domains are found in diverse signaling proteins.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075  738 LIRRPDLRYQLGFSVQNG--------IICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVHILSNAVGEIHMKTM 809
Cdd:pfam00595   2 VTLEKDGRGGLGFSLKGGsdqgdpgiFVSEVLPGGAAEAGGLKVGDRILSINGQDVENMTHEEAVLALKGSGGKVTLTIL 81

Domain present in PSD-95, Dlg, and ZO-1/2; Also called DHR (Dlg homologous region) or GLGF (relatively well conserved tetrapeptide in these domains). Some PDZs have been shown to bind C-terminal polypeptides; others appear to bind internal (non-C-terminal) polypeptides. Different PDZs possess different binding specificities.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075   736 TVLIRRPDLryQLGFSVQNG-------IICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVHILSNAVGEIHMKT 808
Cdd:smart00228   4 LVELEKGGG--GLGFSLVGGkdegggvVVSSVVPGSPAAKAGLRVGDVILEVNGTSVEGLTHLEAVDLLKKAGGKVTLTV 81

                   ..
gi 530391075   809 MP 810
Cdd:smart00228  82 LR 83

Domain present in PSD-95, Dlg, and ZO-1/2; Also called DHR (Dlg homologous region) or GLGF (relatively well conserved tetrapeptide in these domains). Some PDZs have been shown to bind C-terminal polypeptides; others appear to bind internal (non-C-terminal) polypeptides. Different PDZs possess different binding specificities.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075   644 KDVFIEKQKGEiLGVVIVESGWGSilPTVIIANMMHGGPAEKSGkLNIGDQIMSINGTSLVGLPLSTCQSIIKglKNQSR 723
Cdd:smart00228   3 RLVELEKGGGG-LGFSLVGGKDEG--GGVVVSSVVPGSPAAKAG-LRVGDVILEVNGTSVEGLTHLEAVDLLK--KAGGK 76

                   ....*....
gi 530391075   724 VKLNIVRCP 732
Cdd:smart00228  77 VTLTVLRGG 85

PDZ domain 3 of harmonin isoforms a and b, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 3 of harmonin isoforms a and b, and related domains. Harmonin (also known as Usher Type 1C, PDZ-73 and AIE-75) is a key organizer of the Usher (USH) protein interactome. USH syndrome is the leading cause of hereditary sensory deaf-blindness in humans; three clinically distinct types of USH have been identified, type 1 to 3. The gene encoding harmonin (USH1C) is the causative gene for the USH type 1C phenotype. There are at least 10 alternatively spliced isoforms of harmonin, which are divided into three subclasses (a, b, and c). All isoforms contain the first two PDZ domains and the first coiled-coil domain. The a and b isoforms all have a third PDZ domain. The different PDZ domains are responsible for interactions with all known Usher syndrome type 1 proteins, and most Usher syndrome type 2 proteins. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This harmonin family PDZ3 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 530391075 661 VESGWGS-ILPTVIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLPLSTCQSIIKGLKNQSRVKLNIV--RCPPV 734
Cdd:cd06739   18 LEGGIDSpLGGKIVVSAVYEGGAADKHGGIVKGDQIMMVNGKSLTDVTLAEAEAALQRAMNSGGDWIDLViaVAPPK 94

PDZ domain 12 of multi-PDZ-domain protein 1 (MUPP1), PDZ domain 10 of protein-associated tight junction (PATJ, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 12 of MUPP1, PDZ domain 10 of PATJ, and related domains. MUPP1 and PATJ serve as scaffolding proteins linking different proteins and protein complexes involved in the organization of tight junctions and epithelial polarity. MUPP1 contains an L27 (Lin-2 and Lin-7 binding) domain and 13 PDZ domains. PATJ (also known as INAD-like) contains an L27 domain and ten PDZ domains. MUPP1 and PATJ share several binding partners, including junctional adhesion molecules (JAM), zonula occludens (ZO)-3, Pals1 (protein associated with Lin-7), Par (partitioning defective)-6 proteins, and nectins (adherence junction adhesion molecules). PATJ lacks 3 PDZ domains seen in MUPP1: PDZ6, 9, and 13; consequently, MUPP1 PDZ7 and 8 align with PATJ PDZ6 and 7; and MUPP1 PDZ domains 10-12 align with PATJ PDZ domains 8-10. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This MUPP1-like PDZ12 family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 646 VFIEKQKGEILGVVIVeSGWGSIL---PtVIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLplsTCQSIIKGLKNQS 722
Cdd:cd06675    3 VEIKRGPQDSLGISIA-GGVGSPLgdvP-VFIAMIQPNGVAAQTGKLKVGDRIVSINGQSTDGL---THSEAVNLLKNAS 77

PDZ domains of the Na+/H+ exchange regulatory cofactor (NHERF) family (NHERF1-4), and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain of the Na+/H+ exchange regulatory cofactor (NHERF) family of multi-PDZ-domain-containing scaffolding proteins (NHERF1-4), and related domains. The NHERF family includes NHERF1 (also known as EBP50), NHERF2 (also known as E3KARP; TKA-1; SIP-1), NHERF3 (also known as CAP70; CLAMP; Napi-Cap-1; PDZD1) and NHERF4 (also known as IKEPP; PDZK2; Napi-Cap-2). NHERF1 and NHERF2 have tandem PDZ domains (PDZ1-2); NHERF3 and NHERF4 have four PDZ domains (PDZ1-4). NHERFs are involved in the regulation of multiple receptors or transporters, such as type II sodium-phosphate cotransporter (Npt2a), purinergic P2Y1 receptor P2Y1R, the beta2-adrenergic receptor (beta2-AR), parathyroid hormone receptor type 1 (PTHR), the lysophosphatidic acid receptors (LPARs), sodium-hydrogen exchanger 3 (NHE3), and cystic fibrosis transmembrane conductance regulator (CFTR). NHERF-PDZ1 domain interaction partners include Npt2a, purinergic P2Y1 receptor, beta2-AR, CFTR, PTHR, NH3, G-protein-coupled receptor kinase 6 (GRK6A), platelet-derived growth factor receptor (PDGFR), B1 subunit of the H+ATPase, cholesterol, receptor for activated C-kinase RACK1, aquaporin 9, among others. The NHERF PDZ2 domain interacts with fewer proteins: NHERF1 PDZ2 binds Npt2a, PTHR, beta-catenin, aquaporin 9, and RACK1; NHERF2 PDZ2 binds LPA2, P2Y1R, and NHE3, cGMP-dependent protein kinase type II (cGKII). NHERF4 PDZ1 and PDZ4 bind the epithelial Ca(2+) channels TRPV5 and TRPV6. NHERF2/NHERF3 heterodimerization is mediated by PDZ domains of NHERF2 and the C-terminal PDZ domain recognition motif of NHERF3. NHERF4 regulates several transporters mediating influx of xenobiotics and nutrients in the small intestine. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This NHERF-like family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30
                 ....*....|....*....|....*....|....*....
gi 530391075 756 IICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIV 794
Cdd:cd06768   26 FIREVDPGSPAERAGLKDGDRLVEVNGENVEGESHEQVV 64

PDZ domain 6 of glutamate receptor-interacting protein 1 (GRIP1) and GRIP2, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) binding proteins GRIP1 (ABP/GRIP2) and GRIP2, and related domains. GRIP1 and GRIP2 each have 7 PDZ domains. The interaction of GRIP1 and GRIP2 with GluA2/3 (AMPAR subunit) regulates AMPAR trafficking and synaptic targeting. GRIP1 has an essential role in regulating AMPAR trafficking during synaptic plasticity and learning and memory. GRIP1 and GRIP2 interact with a variety of other proteins associated with protein trafficking and internalization, for example GRIP1 also interacts with KIF5 (also known as kinesin 1), EphB receptors, scaffold protein liprin-alpha, and the rasGEF GRASP-1. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This GRIP family PDZ6 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 650 KQKGEILGVVIveSGWGSILPTVIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLPLSTCQSIIKGLKNQsrVKLNIV 729
Cdd:cd06683    9 KRYGGPLGITI--SGTEEPFDPIVISGLTEGGLAERTGAIHVGDRILAINGESLRGKPLSEAIHLLQNAGDT--VTLKIS 84

                 .
gi 530391075 730 R 730
Cdd:cd06683   85 R 85

PDZ domain of sorting nexin-27 (SNX27), and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain of SNX27, and related domains. SNX27 is involved in retrograde transport from endosome to plasma membrane. The PDZ domain of SNX27 links cargo identification to retromer-mediated transport. SNX27 binds to the retromer complex (vacuolar protein sorting 26(VPS26)-VPS29-VPS35), via its PDZ domain binding to VPS26. The SNX27 PDZ domain also binds to cargo including the G-protein-coupled receptors (GPCRs): beta2-adrenergic receptor (beta2AR), beta1AR, parathyroid hormone receptor (PTHR), alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors (AMPARs), NMDA receptors, 5-hydroxytryptamine 4a receptors, frizzled receptors, and somatostatin receptor subtype 5 (SSTR5). Additional binding partners of the SNX27 PDZ domain include G protein-gated inwardly rectifying potassium (Kir3) channels, angiotensin-converting enzyme 2 (ACE2), and PTEN (phosphatase and tensin homolog deleted on chromosome 10); PTEN binding to SNX27 prevents SNX27's association with the retromer complex. SNX27 has been reported to be a host factor needed for efficient entry of an engineered SARS-CoV-2 variant, the spike protein of which contains a deletion at the S1/S2 subunit cleavage site; the PDZ domain of SNX27 binds angiotensin-converting enzyme 2 (ACE2), and may be involved in recycling ACE2 to the plasma membrane, thereby promoting viral entry. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This SNX27-like family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 530391075 757 ICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVHILSNAVGEIHMKTMP 810
Cdd:cd23070   40 VSAVLEGGAADKAGVRKGDRILEVNGVNVEGATHKQVVDLIKSGGDELTLTVIS 93

PDZ domain of membrane palmitoylated proteins 3 (MPP3), MPP4, and MPP7, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain of MPP3, MPP4, and MPP7, and related domains. MPP3 (also known as MAGUK p55 subfamily member 3, erythrocyte membrane protein p55, or EMP55), MPP4 (also known as MAGUK p55 subfamily member 4 or Discs large homolog 6), and MPP7 (also known as MAGUK p55 subfamily member 7) are membrane-associated guanylate kinase (MAGUK)-like proteins. MPP3 is part of a cell adhesion protein complex including tumor suppressor CADM1 and actin-binding protein 4.1B. Participation in the Crumbs cell polarity complex has also been demonstrated for MPP7 in epithelial cells, and for MPP3 and MPP4 in the retina. MPP4 is needed for proper localization of plasma membrane calcium ATPases and maintenance of calcium homeostasis at the rod photoreceptor synaptic terminals. Binding partners of the MPP3 PDZ domain include nectin-3, serotonin 5-hydroxytryptamine, 5-HT(2C) receptor, and a cell adhesion protein, TSLC1 (tumor suppressor in lung cancer 1); fragments of MPP4 having the PDZ domain bind CRB (PDZ-SH3-GUK) and GABA transporter GAT1 (PDZ-SH3). PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This MPP1-like family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 530391075 756 IICSLMRGGIAERGG-VRVGHRIIEINGQSVVATPHEKIVHILSNAVGEIHMKTMP 810
Cdd:cd06799   26 VVARIMRGGAADRSGlIHVGDELREVNGISVEGKDPEEVIQILANSQGPITFKLIP 81

PDZ domain 3 of the full-length isoform of whirlin, PDZ domain 1 of the short isoform of whirlin, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 3 of the full-length isoform of whirlin, PDZ domain 1 of the short isoform of whirlin, and related domains. Whirlin is an essential protein for developmental pathways in photoreceptor cells of the retina and hair cells of the inner ear. The full-length whirlin isoform has two harmonin N-like domains, three PDZ domains, a proline-rich region, and a PDZ-binding motif. Whirlin isoforms may form different complexes at the periciliary membrane complex (PMC) in photoreceptors, and the stereociliary tip and base in inner ear hair cells. It interacts with ADGRV1 and usherin at the PMC; with SANS and RpgrORF15 at the connecting cilium in photoreceptors; with EPS8, MYO15A, p55, and CASK proteins at the stereociliary tip of inner ear hair cells; and with ADGRV1, usherin, and PDZD7 at the stereociliary base in inner ear hair cells. Mutations in the gene encoding whirlin (WHRN; also known as USH2D and DFNB31), have been found to cause either USH2 subtype (USH2D) or autosomal recessive non-syndromic deafness type 31 (DFNB31). Whirlin is the key protein in the USH2 complex (whirlin, usherin and GPR98) which recruits other USH2 causative proteins at the periciliary membrane in photoreceptors and the ankle link of the stereocilia in hair cells. Whirlin's interaction with espin, another stereociliary protein, may be important for the architecture of the USH2 complex. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This whirlin family PDZ3 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 643 CKDVFIEKQKGeILGVVIvESGWGS--ILPTVIiaNMMHGGPAEKSGKLNIGDQIMSINGTSLVGLPLSTC-QSIIKGLK 719
Cdd:cd06742    1 TLLVRIKKTKP-TLGIAI-EGGANTkqPLPRVI--NIQRGGSAHNCGGLKVGHVILEVNGTSLRGLEHREAaRLIAEAFK 76

                 ....
gi 530391075 720 NQSR 723
Cdd:cd06742   77 NKSR 80

C-terminal processing protease CtpA/Prc, contains a PDZ domain [Posttranslational modification, protein turnover, chaperones];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 617 QKEYSDLLNTQDMYNDDL---------IH---FSKSEncKDVFIEKQKGEI--LGVVI-VESGwgsilpTVIIANMMHGG 681
Cdd:COG0793   11 RDNYVDEYDDRDLAEGALngmlgelgdPHsyyLDPEE--YEDFQESTSGEFggLGAELgEEDG------KVVVVSVIPGS 82

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 530391075 682 PAEKSGkLNIGDQIMSINGTSLVGLPLSTCQSIIKGLKNqSRVKLNIVRCP---PVTTVLIRR 741
Cdd:COG0793   83 PAEKAG-IKPGDIILAIDGKSVAGLTLDDAVKLLRGKAG-TKVTLTIKRPGegePITVTLTRA 143

PDZ domain 2 of Discs Large 5 (Dlg5) and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 2 of Drosophila and mammalian Dlg5, and related domains. Dlg5 is a scaffold protein with multiple conserved functions that are independent of each other in regulating growth, cell polarity, and cell adhesion. It has a coiled-coil domain, 4 PDZ domains and a MAGUK domain (an SH3 domain next to a non-catalytically active guanylate kinase domain). Deregulation of Dlg5 has been implicated in the malignancy of several cancer types. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This Dlg5-like family PSZ2 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 530391075 672 VIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLPLSTCQSIIKGlkNQSRVKLNIVRCPP 733
Cdd:cd06765   18 VFISRIVPGSPAAKEGSLTVGDRIIAINGIALDNKSLSECEALLRS--CRDSLSLSLMKVFP 77

PDZ domain 4 of human Ligand of Numb protein X 1 (LNX1) and LNX2, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 4 of LNX1 (also known as PDZ domain-containing RING finger protein 2, PDZRN2)and LNX2 (also known as PDZ domain-containing RING finger protein 1, PDZRN1), and related domains. LNX1 and LNX2 are Ring (Really Interesting New Gene) finger and PDZ domain-containing E3 ubiquitin ligases that bind to the cell fate determinant protein NUMB and mediate its ubiquitination. LNX1 can ubiquitinate a number of other ligands including PPFIA1, KLHL11, KIF7 and ERC2. LNX1 and LNX2 each have four PDZ domains. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This LNX family PDZ4 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 644 KDVFIEKQKGEILGVVIVeSGWGSI--LPTVIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLPLSTCQSIIKGLKNq 721
Cdd:cd06680    1 KDITLRRSSSGSLGFSIV-GGYEEShgNQPFFVKSIVPGTPAYNDGRLKCGDIILAVNGVSTVGMSHAALVPLLKEQRG- 78

                         90
                 ....*....|.
gi 530391075 722 sRVKLNIVRCP 732
Cdd:cd06680   79 -RVTLTVVSWP 88

PDZ domain 1 of protein tyrosine phosphatase non-receptor type 13 (PTPN13),FERM and PDZ domain-containing protein 2 (FRMPD2), and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 1 of PTPN13 [also known as Fas-associated protein-tyrosine phosphatase 1 (FAP-1), protein-tyrosine phosphatase 1E (PTP-E1), and protein-tyrosine phosphatase (PTPL1)], FRMPD2 (also known as PDZ domain-containing protein 4; PDZ domain-containing protein 5C), and related domains. PTPN13 regulates negative apoptotic signaling and mediates phosphoinositide 3-kinase (PI3K) signaling. PTPN13 has five PDZ domains. Proteins known to interact with PTPN13 PDZ domains include: PLEKHA1 and PLEKHA2 via PTPN13-PDZ domain 1, Fas receptor and thyroid receptor-interacting protein 6 via PTPN13-PDZ domain 2, nerve growth factor receptor and protein kinase N2 via PTPN13-PDZ domain 3, PDZ and LIM domain 4 (PDLIM4) via PTPN13-PDZ domains 2 and 4, and brain calpain-2 via PTPN13-PDZ domains 3, 4 and 5. Calpain-2-mediated PTPN13 fragments may be involved in abnormal tau aggregation and increased risk for Alzheimer's disease. FRMPD2 is localized in the basolateral membranes of polarized epithelial cells and is associated with tight junction formation and immune response; it contains 3 PDZ domains. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This PTPN13 family PDZ1 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 530391075 649 EKQKGeiLGVVIVE-SGWGSILPTVIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLplsTCQSIIKGLKNqsrvkln 727
Cdd:cd06694   10 DPQKG--LGFTIVGgENSGSLDLGIFVKSIIPGGPADKDGRIKPGDRIIAINGQSLEGK---THHAAVEIIQN------- 77

                         90
                 ....*....|....*
gi 530391075 728 ivrCPPVTTVLIRRP 742
Cdd:cd06694   78 ---APDKVELIISQP 89

Tensin-related Phosphotyrosine-binding (PTB) domain; Tensin plays critical roles in renal function, muscle regeneration, and cell migration. It binds to actin filaments and interacts with the cytoplasmic tails of beta-integrin via its PTB domain, allowing tensin to link actin filaments to integrin receptors. Tensin functions as a platform for assembly and disassembly of signaling complexes at focal adhesions by recruiting tyrosine-phosphorylated signaling molecules, and also by providing interaction sites for other proteins. In addition to its PTB domain, it contains a C-terminal SH2 domain. PTB domains have a common PH-like fold and are found in various eukaryotic signaling molecules. This domain was initially shown to binds peptides with a NPXY motif with differing requirements for phosphorylation of the tyrosine, although more recent studies have found that some types of PTB domains can bind to peptides lack tyrosine residues altogether. In contrast to SH2 domains, which recognize phosphotyrosine and adjacent carboxy-terminal residues, PTB-domain binding specificity is conferred by residues amino-terminal to the phosphotyrosine. PTB domains are classified into three groups: phosphotyrosine-dependent Shc-like, phosphotyrosine-dependent IRS-like, and phosphotyrosine-independent Dab-like PTB domains.

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gi 530391075 506 VDLFISTQRIKVLNADTQETMMDHPLRTISYIAdignivvlmARrrmpRSNSQENVEASHPSQDGKRQYkmiCHVF---E 582
Cdd:cd13157   43 VILSVSLSGIKICSEDGKVVLMAHALRRVSYST---------CR----PAHAQFAFVARNPGGPTNRQY---CHVFvtrS 106

                         90
                 ....*....|....*....
gi 530391075 583 SEDAQLIAQSIGQAFSVAY 601
Cdd:cd13157  107 PREAQELNLLLCRAFQLAY 125

PDZ1 domain of human syntaxin-binding protein 4 (STXBP4), PDZ2 domain of Gallus gallus uncharacterized STXBP4 isoform X1, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 1 of human syntaxin-binding protein 4 (STXBP4), PDZ2 domain of Gallus gallus uncharacterized STXBP4 isoform X1, and related domains. Human STXBP4 (also known as Synip) includes a single PDZ domain, a coiled-coil domain, and a WW domain (named for its two conserved tryptophans); Gallus gallus STXBP4 isoform X1 contains 2 PDZ domains (PDZ1 and PDZ2). Human STXBP4 plays a role in the translocation of transport vesicles from the cytoplasm to the plasma membrane: insulin induces the dissociation of the STXBP4 and STX4 complex liberating STX4 to interact with Vamp2, and to form the SNARE complex thereby promoting vesicle fusion. It may also play a role in the regulation of insulin release by pancreatic beta cells after stimulation by glucose. Human STXBP4 is also known to physically associate with a prominent isoform of TP63 (deltaNp63alpha 9) whose overexpression promotes squamous cell carcinoma development, and in doing so prevents degradation of this isoform by the Cdc20-APC/C complex, Itch, and RACK1. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This STXBP4-like family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

                         10        20        30        40        50
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gi 530391075 670 PTVIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLPLSTCQSIIKGLK 719
Cdd:cd06698   27 PMVFIQEVIPGGDCYKDGRLRPGDQLVSINKESLIGVTLEEAKSILTRAK 76

PDZ domain of signal-induced proliferation-associated protein 1 (SIPA1), and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain of SIPA1, and related domains. The Rap-GTPase activating protein SIPA1 (also known as GTPase-activating protein Spa-1, p130 SPA1) is a metastasis promoter; a polymorphism in a region of the Sipa1 gene encoding the PDZ domain is associated with metastasis. The SIPA1 PDZ domain binds ribosomal RNA processing 1 homolog B (Rrp1b). SIPA1 also forms a complex with water channel aquaporin-2 (AQP2) and plays a role in trafficking of AQP2, targeted positioning of which strictly regulates body water homeostasis; the SIPA1 PDZ domain binds AQP2. Rrp1b or AQP2 binding inhibits the RapGAP activity of SIPA1. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This SIPA1-like family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged as beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta- strand F.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 530391075 747 QLGFSVQ-NGIICSLMRGGIAERGGVRVGHRIIEINGQSVVATPHEKIVHILSNAV 801
Cdd:cd06745   11 QLGFHVNyEGFVTEVERFGFAWQAGLRQGSRLVEICKVPVATLTHEQMIDLLRTSV 66

PDZ domain 5 of multi-PDZ-domain protein 1 (MUPP1), PATJ (protein-associated tight junction) and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 5 of MUPP1 and PATJ, and related domains. MUPP1 and PATJ serve as scaffolding proteins linking different proteins and protein complexes involved in the organization of tight junctions and epithelial polarity. MUPP1 contains an L27 (Lin-2 and Lin-7 binding) domain and 13 PDZ domains. PATJ (also known as INAD-like) contains an L27 domain and ten PDZ domains. MUPP1 and PATJ share several binding partners, including junctional adhesion molecules (JAM), zonula occludens (ZO)-3, Pals1 (protein associated with Lin-7), Par (partitioning defective)-6 proteins, and nectins (adherence junction adhesion molecules). PATJ lacks 3 PDZ domains seen in MUPP1: PDZ6, 9, and 13; consequently, MUPP1 PDZ7 and 8 align with PATJ PDZ6 and 7; and MUPP1 PDZ domains 10-12 align with PATJ PDZ domains 8-10. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This MUPP1-like family PDZ5 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F

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gi 530391075 642 NCKDVFIEKQKGEilgvviveSGWG-SIL---------PTVI-IANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLPLST 710
Cdd:cd06669    5 SDEVTVIELEKGD--------RGLGfSILdyqdpldpsETVIvIRSLVPGGVAEQDGRLLPGDRLVFVNDVSLENASLDE 76

                         90       100
                 ....*....|....*....|...
gi 530391075 711 CQSIIKGLKnQSRVKLNIVRCPP 733
Cdd:cd06669   77 AVQALKSAP-PGTVRIGVAKPLP 98

PDZ domain 4 of Drosophila Scribble, human Scribble homolog, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 4 of Drosophila Scribble (also known as LAP4), human Scribble homolog (also known as hScrib, LAP4, CriB1, ScrB1 and Vartul), and related domains. They belong to the LAP family, which describes proteins that contain either one or four PDZ domains and 16 LRRs (leucine-rich repeats) and function in controlling cell shape, size and subcellular protein localization. In Drosophila, the Scribble complex, comprising Scribble, discs large, and lethal giant larvae, plays a role in apico-basal cell polarity, in other forms of polarity, including regulation of the actin cytoskeleton, cell signaling and vesicular trafficking, and in tumor development. Mammalian Scribble is important in many aspects of cancer development. Scribble and its homologs can be downregulated or overexpressed in cancer; they have a role in cancer beyond their function in loss of cell polarity. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This Scribble-like family PDZ4 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

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gi 530391075 737 VLIRRPDlrYQLGFSVQNGI----------------ICSLMRGGIAERGG-VRVGHRIIEINGQSVVATPHEKIVHILSN 799
Cdd:cd06701    8 TIVKEPG--EKLGISIRGGAkghagnpldptdegifISKINPDGAAARDGrLKVGQRILEVNGQSLLGATHQEAVRILRS 85

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gi 530391075 800 AVGEIHM 806
Cdd:cd06701   86 VGDTLTL 92

PDZ domain 1 of inactivation-no-after-potential D (INAD), and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 1 of INAD, and related domains. INAD assembles key enzymes of the Drosophila compound eye photo-transduction pathway into a supramolecular complex, supporting efficient and fast light signaling. It contains 5 PDZ domains arranged in tandem (PDZ1-PDZ5) which independently bind various proteins. INAD PDZ2 binds eye-specific protein kinase C, INAD PDZ3 binds transient receptor potential (TRP) channel, and INAD PDZ4,5 tandem binds NORPA (phospholipase Cbeta, PLCbeta). Mutations of the inaD gene that lead to disruption of each of these interactions impair fly photo signal transduction. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This INAD-like family PDZ1 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

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gi 530391075 646 VFIEKQKGEILGVVIV----ESGWGSILPTVIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGlplSTCQSIIKGLKN- 720
Cdd:cd23063    2 VVIEKTEKKSFGICIVrgevKVSPNTKTTGIFIKGIIPDSPAHKCGRLKVGDRILSVNGNDVRN---STEQAAIDLIKEa 78

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gi 530391075 721 QSRVKLNI 728
Cdd:cd23063   79 DFKIVLEI 86

PDZ domain 3 of partitioning defective 3 (Par3), and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 3 of Par3 (or PAR3 or Par-3, also known as Atypical PKC isotype-specific-interacting protein, ASIP, Drosophila Bazooka) and related domains. Par3 is a scaffold protein involved in organizing cell polarity across animals. Par3 binds numerous molecules both for its recruitment to one pole of the cell and for downstream contributions to polarized cell function. It regulates cell polarity by targeting the Par complex proteins Par6 and atypical protein kinase C (aPKC) to specific cortical sites. Physical interactions between Par-3 and the Par complex include Par3 PDZ domain 1 binding to the Par6 PDZ domain, Par3 PDZ domain 1 and PDZ domain 3 binding the Par6's PDZ-binding motif, and an interaction with an undefined region of aPKC that requires both Par3 PDZ2 and PDZ3. The PDZ domains of Par3 have also been implicated as potential phosphoinositide signaling integrators, since its second PDZ domain binds to phosphoinositides, and the third PDZ interacts with phosphoinositide phosphatase PTEN. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This Par3 family PDZ3 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

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gi 530391075 674 IANMMHGGPAEKSGKLNIGDQIMSINGTSLVGLPLSTCQSIIK 716
Cdd:cd23059   41 IKSIIHGGAASKDGRLRVNDQLIAVNGESLLGLTNSEAMETLR 83

PDZ domain of afadin (AFDN), and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain of afadin (AFDN, also known as ALL1-fused gene from chromosome 6 protein (AF6) and MLLT4), and related domains. AFDN belongs to the adhesion system, probably together with the E-cadherin-catenin system, that plays a role in the organization of homotypic, interneuronal, and heterotypic cell-cell adherens junctions. The AFDN PDZ domain interaction partners include poliovirus receptor-related protein PRR2/nectin, the junctional adhesion molecule (JAM), the breakpoint-cluster-region protein (BCR), connexin36 (Cx36), and a subset of Eph-related receptor tyrosine kinases; it can also bind low molecular weight ligands, in competition with a natural peptide ligand. Other AFDN-binding proteins have been identified. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This AFDN family domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

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gi 530391075 646 VFIEKQKGEiLGVVIVES-GWGSILPTVIIANMMHGGPAEKSGKLNIGDQIMSINGTSLVGL 706
Cdd:cd06789    6 VTLKKVGNG-MGLSIVAAkGAGQDKLGIYIKSVVKGGAADLDGRLQAGDQLLSVDGHSLVGL 66

PDZ domain 1 of Zonula Occludens-1 (ZO-1), homologs ZO-2 and ZO-3, and related domains; PDZ (PSD-95 (Postsynaptic density protein 95), Dlg (Discs large protein), and ZO-1 (Zonula occludens-1)) domain 1 of ZO-1, -2, -3 and related domains. Zonula occludens proteins (ZO-1, ZO-2, ZO-3) are multi-PDZ domain proteins involved in the maintenance and biogenesis of multi-protein networks at the cytoplasmic surface of intercellular contacts in epithelial and endothelial cells. They have three N-terminal PDZ domains, PDZ1-3, followed by a Src homology-3 (SH3) domain and a guanylate kinase (GuK)-like domain. Among protein-protein interactions for all ZO proteins is the binding of the first PDZ domain (PDZ1) to the C-termini of claudins, and the homo- and hetero-dimerization of ZO-proteins via their second PDZ domain (PDZ2), which takes place by symmetrical domain swapping of the first two beta-strands of PDZ2. At the cell level, ZO-1 and ZO-2 are involved in polarity maintenance, gene transcription, cell proliferation, and tumor cell metastasis. PDZ domains usually bind in a sequence-specific manner to short peptide sequences located at the C-terminal end of their partner proteins (known as PDZ binding motifs). The PDZ superfamily includes canonical PDZ domains as well as those with circular permutations and domain swapping mediated by beta-strands. This ZO family PDZ1 domain is a canonical PDZ domain containing six beta-strands A-F and two alpha-helices (alpha-helix 1 and 2), arranged in the order: beta-strands A, B, C, alpha-helix 1, beta-strands D, E, alpha-helix 2 and beta-strand F.

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gi 530391075 670 PTVIIANMMHGGPAEksGKLNIGDQIMSINGTSLVGLPLSTCQSIIK 716
Cdd:cd06727   31 TSIVISDVLKGGPAE--GKLQENDRVVSVNGVSMENVEHSFAVQILR 75