Dual specificity phosphatase, catalytic domain;

                           10        20        30        40        50        60        70
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 678012440     1 ARHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:smart00195  61 SPYFPEAVEFIEDAESKGGKVLVHCQAGVSRSATLIIAYLMKTRNMSLNDAYDFVKDRRPIISPNFGFLRQLIEYER 137

Protein-tyrosine phosphatase [Signal transduction mechanisms];

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 678012440   1 ARHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTiTDFGWEDALSVVRAARSCANPNMGFQRQLQEFEKH 78
Cdd:COG2453   63 DEQLQEAVDFIDEALREGKKVLVHCRGGIGRTGTVAAAYLVL-LGLSAEEALARVRAARPGAVETPAQRAFLERFAKR 139

dual specificity phosphatase domain of dual specificity protein phosphatase 22, 15, and similar proteins; Dual specificity protein phosphatase 22 (DUSP22, also known as VHX) and 15 (DUSP15, also known as VHY) function as protein-serine/threonine phosphatases (EC 3.1.3.16) and protein-tyrosine-phosphatases (EC 3.1.3.48). They are atypical DUSPs; they contain the catalytic dual specificity phosphatase domain but lack the N-terminal Cdc25/rhodanese-like domain that is present in typical DUSPs or MKPs. The both contain N-terminal myristoylation recognition sequences and myristoylation regulates their subcellular location. DUSP22 negatively regulates the estrogen receptor-alpha-mediated signaling pathway and the IL6-leukemia inhibitory factor (LIF)-STAT3-mediated signaling pathway. DUSP15 has been identified as a regulator of oligodendrocyte differentiation. DUSP22 is a single domain protein containing only the catalytic dual specificity phosphatase domain while DUSP15 contains a short C-terminal tail.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 678012440   1 ARHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:cd14519   60 SQHFRECINFIHEARLNGGNVLVHCLAGVSRSVTIVAAYLMTVTDLGWRDALKAVRAARPCANPNFGFQRQLQEFEK 136

dual-specificity phosphatase domain; The dual-specificity phosphatase domain is found in typical and atypical dual-specificity phosphatases (DUSPs), which function as protein-serine/threonine phosphatases (EC 3.1.3.16) and protein-tyrosine-phosphatases (EC 3.1.3.48). Typical DUSPs, also called mitogen-activated protein kinase (MAPK) phosphatases (MKPs), deactivate MAPKs by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. All MKPs contain an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain. Atypical DUSPs contain the catalytic dual specificity phosphatase domain but lack the N-terminal Cdc25/rhodanese-like domain that is present in typical DUSPs or MKPs. Also included in this family are dual specificity phosphatase-like domains of catalytically inactive members such as serine/threonine/tyrosine-interacting protein (STYX) and serine/threonine/tyrosine interacting like 1 (STYXL1), as well as active phosphatases with substrates that are not phosphoproteins such as PTP localized to the mitochondrion 1 (PTPMT1), which is a lipid phosphatase, and laforin, which is a glycogen phosphatase.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 678012440   2 RHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQE 74
Cdd:cd14498   63 SHFEEAIEFIEEALKKGGKVLVHCQAGVSRSATIVIAYLMKKYGWSLEEALELVKSRRPIISPNPGFLKQLKE 135

Dual specificity phosphatase, catalytic domain; Ser/Thr and Tyr protein phosphatases. The enzyme's tertiary fold is highly similar to that of tyrosine-specific phosphatases, except for a "recognition" region.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 678012440    1 ARHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFE 76
Cdd:pfam00782  52 SKYLEEAVEFIDDARQKGGKVLVHCQAGISRSATLIIAYLMKTRNLSLNEAYSFVKERRPGISPNFGFKRQLLEYE 127

dual specificity phosphatase domain of class III mitogen-activated protein kinase phosphatase; Mitogen-activated protein kinase (MAPK) phosphatases (MKPs) are eukaryotic dual-specificity phosphatases (DUSPs) that act on MAPKs and function as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). They deactivate MAPKs by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. Based on sequence homology, subcellular localization and substrate specificity, 10 MKPs can be subdivided into three subfamilies (class I-III). Class III MKPs consist of DUSP8, DUSP10/MKP-5 and DUSP16/MKP-7, and are JNK/p38-selective phosphatases, which are found in both the cell nucleus and cytoplasm. All MKPs contain an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 678012440   3 HFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:cd14568   64 WLDKAVEFIEKARASNKRVLVHCLAGISRSATIAIAYIMKHMRMSLDDAYRFVKEKRPTISPNFNFLGQLLEFEK 138

dual specificity phosphatase domain of slingshot family phosphatases; The slingshot (SSH) family of dual specificity protein phosphatases is composed of Drosophila slingshot phosphatase and its vertebrate homologs: SSH1, SSH2 and SSH3. Its members specifically dephosphorylate and reactivate Ser-3-phosphorylated cofilin (P-cofilin), an actin-binding protein that plays an essential role in actin filament dynamics. In Drosophila, loss of ssh gene function causes prominent elevation in the levels of P-cofilin and filamentous actin and disorganized epidermal cell morphogenesis, including bifurcation phenotypes of bristles and wing hairs. SSH family phosphatases contain an N-terminal, SSH family-specific non-catalytic (SSH-N) domain, followed by a short domain with similarity to the C-terminal domain of the chromatin-associated protein DEK, and a dual specificity phosphatase catalytic domain. In addition, many members contain a C-terminal tail. The SSH-N domain plays critical roles in P-cofilin recognition, F-actin-mediated activation, and subcellular localization of SSHs.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 678012440   3 HFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMtiTDFGW--EDALSVVRAARSCANPNMGFQRQLQEFE 76
Cdd:cd14513   63 YWNETYRFIKEARRKGSKVLVHCKMGVSRSASTVIAYAM--KEYGWslEQALEHVKERRSCIKPNPGFLRQLITYE 136

dual specificity phosphatase domain of dual specificity protein phosphatase 12 and similar proteins; Dual specificity protein phosphatase 12 (DUSP12), also called YVH1, functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). It deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. DUSP12 is an atypical DUSP; it contains the catalytic dual specificity phosphatase domain but lacks the N-terminal Cdc25/rhodanese-like domain that is present in typical DUSPs or MKPs. It targets p38 MAPK to regulate macrophage response to bacterial infection. It also ameliorates cardiac hypertrophy in response to pressure overload through c-Jun N-terminal kinase (JNK) inhibition. DUSP12 has been identified as a modulator of cell cycle progression, a function independent of phosphatase activity and mediated by its C-terminal zinc-binding domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 678012440   3 HFRESIKFIHECRLTGeGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:cd14520   65 RLDECLDFIDEGRAEG-AVLVHCHAGVSRSAAVVTAYLMKTEQLSFEEALASLRECKPDVKPNDGFLKQLKLYEA 138

dual specificity phosphatase domain of dual specificity protein phosphatase 10; Dual specificity protein phosphatase 10 (DUSP10), also called mitogen-activated protein kinase (MAPK) phosphatase 5 (MKP-5), functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). Like other MKPs, it deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. It belongs to the class III subfamily and is a JNK/p38-selective cytoplasmic MKP. DUSP10/MKP-5 coordinates skeletal muscle regeneration by negatively regulating mitochondria-mediated apoptosis. It is also an important regulator of intestinal epithelial barrier function and a suppressor of colon tumorigenesis. DUSP10/MKP-5 contains an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....
gi 678012440   3 HFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFE 76
Cdd:cd14567   65 YFEEAFEFIEEAHQSGKGVLVHCQAGVSRSATIVIAYLMKHTRMTMTDAYKFVKNKRPIISPNLNFMGQLLEFE 138

dual specificity phosphatase domain of mitogen-activated protein kinase phosphatase; Mitogen-activated protein kinase (MAPK) phosphatases (MKPs) are eukaryotic dual-specificity phosphatases (DUSPs) that act on MAPKs, which are involved in gene regulation, cell proliferation, programmed cell death and stress responses, as an important feedback control mechanism that limits MAPK cascades. MKPs, also referred to as typical DUSPs, function as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). They deactivate MAPKs by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. All MKPs contain an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain. Based on sequence homology, subcellular localization and substrate specificity, 10 MKPs can be subdivided into three subfamilies (class I-III).

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....
gi 678012440   2 RHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEF 75
Cdd:cd14512   63 PWFDEAIEFIEEAKASNGGVLVHCLAGISRSATIAIAYLMKRMRMSLDEAYDFVKEKRPTISPNFNFMGQLLDF 136

dual specificity phosphatase domain of fungal YVH1-like dual specificity protein phosphatase; This family is composed of Saccharomyces cerevisiae dual specificity protein phosphatase Yvh1 and similar fungal proteins. Yvh1 could function as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). It regulates cell growth, sporulation, and glycogen accumulation. It plays an important role in ribosome assembly. Yvh1 associates transiently with late pre-60S particles and is required for the release of the nucleolar/nuclear pre-60S factor Mrt4, which is necessary to construct a translation-competent 60S subunit and mature ribosome stalk. Yvh1 contains an N-terminal catalytic dual specificity phosphatase domain and a C-terminal tail.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 678012440   3 HFRESIKFIHEC-----------RLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQ 71
Cdd:cd14518   64 HFPETNRFIDSAlfgngkdedeeKKHGGAVLVHCAMGKSRSVTVVIAYLMYKYNLSVSQALHAVRRKRPIAEPNDGFMEQ 143

                 ....*.
gi 678012440  72 LQEFEK 77
Cdd:cd14518  144 LELYHE 149

dual specificity phosphatase domain of dual specificity protein phosphatase 7; Dual specificity protein phosphatase 7 (DUSP7), also called mitogen-activated protein kinase (MAPK) phosphatase X (MKP-X) or dual specificity protein phosphatase PYST2, functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). Like other MKPs, it deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. It belongs to the class II subfamily and is an ERK-selective cytoplasmic MKP. DUSP7 has been shown as an essential regulator of multiple steps in oocyte meiosis. Due to alternative promoter usage, the PYST2 gene gives rise to two isoforms, PYST2-S and PYST2-L. PYST2-L is over-expressed in leukocytes derived from AML and ALL patients as well as in some solid tumors and lymphoblastoid cell lines; it plays a role in cell-crowding. It contains an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 678012440   1 ARHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:cd14643   68 SQFFPEAISFIDEARSKKCGILVHCLAGISRSVTVTVAYLMQKLNLSLNDAYDFVKRKKSNISPNFNFMGQLLDFER 144

dual specificity phosphatase domain of dual specificity protein phosphatase 9; Dual specificity protein phosphatase 9 (DUSP9), also called mitogen-activated protein kinase (MAPK) phosphatase 4 (MKP-4), functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). Like other MKPs, it deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. It belongs to the class II subfamily and is an ERK-selective cytoplasmic MKP. DUSP9 is a mediator of bone morphogenetic protein (BMP) signaling to control the appropriate ERK activity critical for the determination of embryonic stem cell fate. Down-regulation of DUSP9 expression has been linked to severe pre-eclamptic placenta as well as cancers such as hepatocellular carcinoma. DUSP9 contains an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 678012440   1 ARHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:cd14644   65 SQFFPEAIEFIDEALSQNCGVLVHCLAGISRSVTVTVAYLMQKLNLSLNDAYDLVKRKKSNISPNFNFMGQLLDFEK 141

dual specificity phosphatase domain of dual specificity protein phosphatase 6; Dual specificity protein phosphatase 6 (DUSP6), also called mitogen-activated protein kinase (MAPK) phosphatase 3 (MKP-3) or dual specificity protein phosphatase PYST1, functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). Like other MKPs, it deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. It belongs to the class II subfamily and is an ERK-selective cytoplasmic MKP. DUSP6/MKP-3 plays an important role in obesity-related hyperglycemia by promoting hepatic glucose output. MKP-3 deficiency attenuates body weight gain induced by a high-fat diet, protects mice from developing obesity-related hepatosteatosis, and reduces adiposity, possibly by repressing adipocyte differentiation. It also contributes to p53-controlled cellular senescence. It contains an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 678012440   1 ARHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:cd14642   65 SQFFPEAISFIDEARGKNCGVLVHCLAGISRSVTVTVAYLMQKLNLSMNDAYDIVKMKKSNISPNFNFMGQLLDFER 141

dual specificity protein phosphatase 28; Dual specificity protein phosphatase 28 (DUSP28), also called VHP, functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). It is an atypical DUSP that contains the catalytic dual specificity phosphatase domain but lacks the N-terminal Cdc25/rhodanese-like domain that is present in typical DUSPs or MKPs. It has been implicated in hepatocellular carcinoma progression and in migratory activity and drug resistance of pancreatic cancer cells. DUSP28 has an exceptionally low phosphatase activity due to the presence of bulky residues in the active site pocket resulting in low accessibility.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 678012440   2 RHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:cd14574   62 RHFEQCADAIEAAVRRGGKCLVYCKNGRSRSAAVCIAYLMKHRGLSLQDAFQVVKAARPVAEPNPGFWSQLQRYEE 137

dual specificity phosphatase domain of slingshot homolog 2; Dual specificity protein phosphatase slingshot homolog 2 (SSH2), also called SSH-like protein 2, is part of the slingshot (SSH) family, whose members specifically dephosphorylate and reactivate Ser-3-phosphorylated cofilin (P-cofilin), an actin-binding protein that plays an essential role in actin filament dynamics. SSH2 has been identified as a target of protein kinase D1 that regulates cofilin phosphorylation and remodeling of the actin cytoskeleton during neutrophil chemotaxis. There are at least two human SSH2 isoforms reported: hSSH-2L (long) and hSSH-2. As SSH family phosphatases, they contain an N-terminal, SSH family-specific non-catalytic (SSH-N) domain, followed by a short domain with similarity to the C-terminal domain of the chromatin-associated protein DEK, and a dual specificity phosphatase catalytic domain. In addition, hSSH-2L contains a long C-terminal tail while hSSH-2 does not.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 678012440   3 HFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMtiTDFGW--EDALSVVRAARSCANPNMGFQRQLQEFE 76
Cdd:cd14569   66 YWNDTYKFISKAKKHGSKCLVHCKMGVSRSASTVIAYAM--KEYGWnlDRAYDYVKERRTVTKPNPSFMRQLEEYQ 139

dual specificity phosphatase domain of fungal dual specificity protein phosphatase SDP1, MSG5, and similar proteins; This family is composed of fungal dual specificity protein phosphatases (DUSPs) including Saccharomyces cerevisiae SDP1 and MSG5, and Schizosaccharomyces pombe Pmp1. function as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). They deactivate MAPKs by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. SDP1 is oxidative stress-induced and dephosphorylates MAPK substrates such as SLT2. MSG5 dephosphorylates the Fus3 and Slt2 MAPKs operating in the mating and cell wall integrity (CWI) pathways, respectively. Pmp1 is responsible for dephosphorylating the CWI MAPK Pmk1. These phosphatases bind to their target MAPKs through a conserved IYT motif located outside of the dual specificity phosphatase domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 678012440   8 IKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEKH 78
Cdd:cd14521   84 TSIIEDATQSGKKVLIHCQCGVSRSASLIIAYIMKKLGLSLNDAYDLLKSRSPWIGPNMSLIFQLMEFEKV 154

dual specificity phosphatase domain of dual specificity protein phosphatase 1; Dual specificity protein phosphatase 1 (DUSP1), also called mitogen-activated protein kinase (MAPK) phosphatase 1 (MKP-1), functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). Like other MKPs, it deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. It belongs to the class I subfamily and is a mitogen- and stress-inducible nuclear MKP. Human MKP-1 dephosphorylates MAPK1/ERK2, regulating its activity during the meiotic cell cycle. Although initially MKP-1 was considered to be ERK-specific, it has been shown that MKP-1 also dephosphorylates both JNK and p38 MAPKs. DUSP1/MKP-1 is involved in various functions, including proliferation, differentiation, and apoptosis in normal cells. It is a central regulator of a variety of functions in the immune, metabolic, cardiovascular, and nervous systems. It contains an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 678012440   4 FRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEKH 78
Cdd:cd14638   64 FNEAIDFIDSVKNAGGRVFVHCQAGISRSATICLAYLMRTNRVKLDEAFEFVKQRRSIISPNFSFMGQLLQFESQ 138

dual specificity phosphatase domain of dual specificity protein phosphatase 4; Dual specificity protein phosphatase 4 (DUSP4), also called mitogen-activated protein kinase (MAPK) phosphatase 2 (MKP-2), functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). Like other MKPs, it deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. It belongs to the class I subfamily and is a mitogen- and stress-inducible nuclear MKP. DUSP4 regulates either ERK or c-JUN N-terminal kinase (JNK), depending on the cell type. It dephosphorylates nuclear JNK and induces apoptosis in diffuse large B cell lymphoma (DLBCL) cells. It acts as a negative regulator of macrophage M1 activation and inhibits inflammation during macrophage-adipocyte interaction. It has been linked to different aspects of cancer: it may have a role in the development of ovarian cancers, oesophagogastric rib metastasis, and pancreatic tumours; it may also be a candidate tumor suppressor gene, with its deletion implicated in breast cancer, prostate cancer, and gliomas. DUSP4/MKP-2 contains an N-terminal Cdc25/rhodanese-like domain, which is responsible for MAPK-binding, and a C-terminal catalytic dual specificity phosphatase domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 678012440   4 FRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFEKH 78
Cdd:cd14640   64 FMEAIEYIDSVKDCNGRVLVHCQAGISRSATICLAYLMMKKRVRLEEAFEFVKQRRSIISPNFSFMGQLLQFESQ 138

dual specificity protein phosphatase 26; Dual specificity protein phosphatase 26 (DUSP26), also called mitogen-activated protein kinase (MAPK) phosphatase 8 (MKP-8) or low-molecular-mass dual-specificity phosphatase 4 (LDP-4), functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). It deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. DUSP26 is an atypical DUSP; it contains the catalytic dual specificity phosphatase domain but lacks the N-terminal Cdc25/rhodanese-like domain that is present in typical DUSPs or MKPs. It is a brain phosphatase highly overexpressed in neuroblastoma and has also been identified as a p53 phosphatase, dephosphorylating phospho-Ser20 and phospho-Ser37 in the p53 transactivation domain.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 678012440   3 HFRESIKFIHEC-RLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCAnPNMGFQRQLQEFEK 77
Cdd:cd14578   68 HFYPAADFIHRAlSQPGGKILVHCAVGVSRSATLVLAYLMIHHHMTLVEAIKTVKDHRGII-PNRGFLRQLLALDR 142

dual specificity protein phosphatase 13 isoform A; Dual specificity protein phosphatase 13 isoform A (DUSP13A), also called branching-enzyme interacting DSP or muscle-restricted DSP (MDSP), functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). It deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. DUSP13A is an atypical DUSP; it contains the catalytic dual specificity phosphatase domain but lacks the N-terminal Cdc25/rhodanese-like domain that is present in typical DUSPs or MKPs. DUSP13A also functions as a regulator of apoptosis signal-regulating kinase 1 (ASK1), a MAPK kinase kinase, by interacting with its N-terminal domain and inducing ASK1-mediated apoptosis through the activation of caspase-3. This function is independent of phosphatase activity.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 678012440   1 ARHFRESIKFIHEC-RLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCAnPNMGFQRQL 72
Cdd:cd14580   67 SPYFYSAAEFIHRAlNTPGAKVLVHCAVGVSRSATLVLAYLMIYHQLSLVQAIKTVKERRWIF-PNRGFLKQL 138

dual specificity protein phosphatases 18 and 21; This subfamily contains dual specificity protein phosphatase 18 (DUSP18), dual specificity protein phosphatase 21 (DUSP21), and similar proteins. They function as protein-serine/threonine phosphatases (EC 3.1.3.16) and protein-tyrosine-phosphatases (EC 3.1.3.48), and are atypical DUSPs. They contain the catalytic dual specificity phosphatase domain but lack the N-terminal Cdc25/rhodanese-like domain that is present in typical DUSPs or MKPs. DUSP18, also called low molecular weight dual specificity phosphatase 20 (LMW-DSP20), is a catalytically active phosphatase with a preference for phosphotyrosine over phosphoserine/threonine oligopeptides in vitro. In vivo, it has been shown to interact and dephosphorylate SAPK/JNK, and may play a role in regulating the SAPK/JNK pathway. DUSP21 is also called low molecular weight dual specificity phosphatase 21 (LMW-DSP21). Its gene has been identified as a potential therapeutic target in human hepatocellular carcinoma. DUSP18 and DUSP21 target to opposing sides of the mitochondrial inner membrane.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 678012440  11 IHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCANPNMGFQRQLQEFE 76
Cdd:cd14573   72 IHTVEARGGRTLLHCVAGVSRSATLCLAYLMKYHAMSLLDAHTWVKSCRPIIRPNNGFWEQLIHYE 137

dual specificity protein phosphatase 13 isoform B; Dual specificity protein phosphatase 13 isoform B (DUSP13B), also called testis- and skeletal-muscle-specific DSP (TMDP) or dual specificity phosphatase SKRP4, functions as a protein-serine/threonine phosphatase (EC 3.1.3.16) and a protein-tyrosine-phosphatase (EC 3.1.3.48). It deactivates its MAPK substrates by dephosphorylating the threonine and tyrosine residues in the conserved Thr-Xaa-Tyr motif residing in their activation sites. DUSP13B is an atypical DUSP; it contains the catalytic dual specificity phosphatase domain but lacks the N-terminal Cdc25/rhodanese-like domain that is present in typical DUSPs or MKPs. DUSP13B inactivates MAPK activation in the order of selectivity, JNK = p38 > ERK in cells. It may play a role in protection from external stress during spermatogenesis.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 678012440  22 LVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCAnPNMGFQRQLQEFEK 77
Cdd:cd14577  107 LVHCAMGISRSATLVLAFLMICEDLTLVDAIQTVRAHRDIC-PNSGFLRQLRELDN 161

dual specificity phosphatase-like domain of inactive dual specificity protein phosphatase 27; Inactive dual specificity protein phosphatase 27 (DUSP27) may play a role in myofiber maturation. It is a pseudophosphatase containing a substitution of the active site cysteine into a serine. It is a large protein of more than 1000 amino acids in length with an N-terminal dual specificity phosphatase-like domain.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 678012440   1 ARHFRESIKFIHECRLTGEG-CLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSCAnPNMGFQRQLQEFEKHD 79
Cdd:cd14576   77 SKHFRKGAEFLDEALLTYRGkVLVSSEMGISRSAVLVAAYLMIFHNMTIMEALMTLRKKRAIY-PNEGFLKQLRELNEKL 155

                 ...
gi 678012440  80 VDQ 82
Cdd:cd14576  156 LEE 158

unknown subfamily of bacterial and plant dual specificity protein phosphatases; This subfamily is composed of uncharacterized bacterial and plant dual-specificity protein phosphatases. DUSPs function as a protein-serine/threonine phosphatases (EC 3.1.3.16) and a protein-tyrosine-phosphatases (EC 3.1.3.48).

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....
gi 678012440   5 RESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDF-GWEDALSVVRAARSCANPNMGFQRQLQEFEK 77
Cdd:cd14527   63 ERAVAWIEELRAQGGPVLVHCALGYGRSATVVAAWLLAYGRAkSVAEAEALIRAARPQVVLNPAQRKALEAWSG 136

cys-based protein tyrosine phosphatase and dual-specificity phosphatase superfamily; This superfamily is composed of cys-based phosphatases, which includes classical protein tyrosine phosphatases (PTPs) as well as dual-specificity phosphatases (DUSPs or DSPs). They are characterized by a CxxxxxR conserved catalytic loop (where C is the catalytic cysteine, x is any amino acid, and R is an arginine). PTPs are part of the tyrosine phosphorylation/dephosphorylation regulatory mechanism, and are important in the response of the cells to physiologic and pathologic changes in their environment. DUSPs show more substrate diversity (including RNA and lipids) and include pTyr, pSer, and pThr phosphatases.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 678012440   4 FRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAAR-SCANPNMGFQRQLQE 74
Cdd:cd14494   42 VDRFLEVLDQAEKPGEPVLVHCKAGVGRTGTLVACYLVLLGGMSAEEAVRIVRLIRpGGIPQTIEQLDFLIK 113

dual specificity phosphatase domain of laforin and similar domains; This family is composed of glucan phosphatases including vertebrate dual specificity protein phosphatase laforin, also called lafora PTPase (LAFPTPase), and plant starch excess4 (SEX4). Laforin is a glycogen phosphatase; its gene is mutated in Lafora progressive myoclonus epilepsy or Lafora disease (LD), a fatal autosomal recessive neurodegenerative disorder characterized by the presence of progressive neurological deterioration, myoclonus, and epilepsy. One characteristic of LD is the accumulation of insoluble glucans. Laforin prevents LD by at least two mechanisms: by preventing hyperphosphorylation of glycogen by dephosphorylating it, allowing proper glycogen formation, and by promoting the ubiquitination of proteins involved in glycogen metabolism via its interaction with malin. Laforin contains an N-terminal CBM20 (carbohydrate-binding module, family 20) domain and a C-terminal catalytic dual specificity phosphatase (DSP) domain. Plant SEX4 regulate starch metabolism by selectively dephosphorylating glucose moieties within starch glucan chains. It contains an N-terminal catalytic DSP domain and a C-terminal Early (E) set domain.

                         10        20        30
                 ....*....|....*....|....*....|....*....
gi 678012440  23 VHCLAGVSRSVTLVVAYIMTITDFGWEDALSVVRAARSC 61
Cdd:cd14526   99 VHCTAGLGRAPATVIAYLYWVLGYSLDEAYYLLTSKRPC 137

Protein tyrosine phosphatase, catalytic domain, undefined specificity; Protein tyrosine phosphatases. Homologues detected by this profile and not by those of "PTPc" or "DSPc" are predicted to be protein phosphatases with a similar fold to DSPs and PTPs, yet with unpredicted specificities.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|
gi 678012440     2 RHFRESIKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIM 41
Cdd:smart00012  23 LELLRAVKKNLNQSESSGPVVVHCSAGVGRTGTFVAIDIL 62

cyclin-dependent kinase inhibitor 3 and similar proteins; This family is composed of eukaryotic cyclin-dependent kinase inhibitor 3 (CDKN3) and related archaeal and bacterial proteins. CDKN3 is also known as kinase-associated phosphatase (KAP), CDK2-associated dual-specificity phosphatase, cyclin-dependent kinase interactor 1 (CDI1), or cyclin-dependent kinase-interacting protein 2 (CIP2). It has been characterized as dual-specificity phosphatase, which function as a protein-serine/threonine phosphatase (EC 3.1.3.16) and protein-tyrosine-phosphatase (EC 3.1.3.48). It dephosphorylates CDK2 at a threonine residue in a cyclin-dependent manner, resulting in the inhibition of G1/S cell cycle progression. It also interacts with CDK1 and controls progression through mitosis by dephosphorylating CDC2. CDKN3 may also function as a tumor suppressor; its loss of function was found in a variety of cancers including glioblastoma and hepatocellular carcinoma. However, it has also been found over-expressed in many cancers such as breast, cervical, lung and prostate cancers, and may also have an oncogenic function.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 678012440   8 IKFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIMTITDF-GWEDALSVVRAAR 59
Cdd:cd14505   96 LEELLSALENGKKVLIHCKGGLGRTGLIAACLLLELGDTlDPEQAIAAVRALR 148

catalytic domain of protein tyrosine phosphatases; Protein tyrosine phosphatases (PTP, EC 3.1.3.48) catalyze the dephosphorylation of phosphotyrosine peptides; they regulate phosphotyrosine levels in signal transduction pathways. The depth of the active site cleft renders the enzyme specific for phosphorylated Tyr (pTyr) residues, instead of pSer or pThr. This family has a distinctive active site signature motif, HCSAGxGRxG, and are characterized as either transmembrane, receptor-like or non-transmembrane (soluble) PTPs. Receptor-like PTP domains tend to occur in two copies in the cytoplasmic region of the transmembrane proteins, only one copy may be active.

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 678012440   8 IKFIHECRLTGEGC----LVHCLAGVSRSVTLVVAYIM--TITDFGWEDALSVVRAARSCAnPNMgFQRQLQ 73
Cdd:cd00047  125 LALVRRVRKEARKPngpiVVHCSAGVGRTGTFIAIDILleRLEAEGEVDVFEIVKALRKQR-PGM-VQTLEQ 194

C-terminal dual-specificity phosphatase domain of CDC14 family proteins; The cell division control protein 14 (CDC14) family is highly conserved in all eukaryotes, although the roles of its members seem to have diverged during evolution. Yeast Cdc14, the best characterized member of this family, is a dual-specificity phosphatase that plays key roles in cell cycle control. It preferentially dephosphorylates cyclin-dependent kinase (CDK) targets, which makes it the main antagonist of CDK in the cell. Cdc14 functions at the end of mitosis and it triggers the events that completely eliminates the activity of CDK and other mitotic kinases. It is also involved in coordinating the nuclear division cycle with cytokinesis through the cytokinesis checkpoint, and in chromosome segregation. Cdc14 phosphatases also function in DNA replication, DNA damage checkpoint, and DNA repair. Vertebrates may contain more than one Cdc14 homolog; humans have three (CDC14A, CDC14B, and CDC14C). CDC14 family proteins contain a highly conserved N-terminal pseudophosphatase domain that contributes to substrate specificity and a C-terminal catalytic dual-specificity phosphatase domain with the PTP signature motif.

                         10        20        30
                 ....*....|....*....|....*....|...
gi 678012440   9 KFIHECRLTGEGCLVHCLAGVSRSVTLVVAYIM 41
Cdd:cd14499  100 KFLDICENEKGAIAVHCKAGLGRTGTLIACYLM 132