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Conserved domains on  [gi|1720380328|ref|XP_030103778|]
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epimerase family protein SDR39U1 isoform X1 [Mus musculus]

Protein Classification

Rossmann-fold NAD(P)-binding domain-containing protein( domain architecture ID 229380)

Rossmann-fold NAD(P)-binding domain-containing protein may function as an oxidoreductase

Graphical summary

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List of domain hits

Name Accession Description Interval E-value
NADB_Rossmann super family cl21454
Rossmann-fold NAD(P)(+)-binding proteins; A large family of proteins that share a ...
2-185 1.71e-83

Rossmann-fold NAD(P)(+)-binding proteins; A large family of proteins that share a Rossmann-fold NAD(P)H/NAD(P)(+) binding (NADB) domain. The NADB domain is found in numerous dehydrogenases of metabolic pathways such as glycolysis, and many other redox enzymes. NAD binding involves numerous hydrogen-bonds and van der Waals contacts, in particular H-bonding of residues in a turn between the first strand and the subsequent helix of the Rossmann-fold topology. Characteristically, this turn exhibits a consensus binding pattern similar to GXGXXG, in which the first 2 glycines participate in NAD(P)-binding, and the third facilitates close packing of the helix to the beta-strand. Typically, proteins in this family contain a second domain in addition to the NADB domain, which is responsible for specifically binding a substrate and catalyzing a particular enzymatic reaction.


The actual alignment was detected with superfamily member cd05242:

Pssm-ID: 473865 [Multi-domain]  Cd Length: 296  Bit Score: 248.68  E-value: 1.71e-83
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328   2 TAYYQPSLTKEYDEDSPGGnFDFFSNLVTKWEAAARLPGE-STRQVVVRSGVVLGRGGGAISHMLLPFRLGLGGPIGSGR 80
Cdd:cd05242   113 VGYYGHSGDEVLTENSPSG-KDFLAEVCKAWEKAAQPASElGTRVVILRTGVVLGPDGGALPKMLLPFRLGLGGPLGSGR 191
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  81 QFFPWIHIGDLAGILNYALEANHVQGVLNGVAPAStTTNAEFAQALGAALGRPAFIPVPSTVVRAVFGE-RAIMLLEGQK 159
Cdd:cd05242   192 QWMSWIHIDDLVRLIEFAIENPDLSGPVNAVAPNP-VTNAEFTKALGRALHRPAGLPVPAFALKLGFGEmRAELLLKGQR 270
                         170       180
                  ....*....|....*....|....*.
gi 1720380328 160 VVPRRTLATGYQYSFPELRAALKDVV 185
Cdd:cd05242   271 VLPERLLDAGFQFRYPDLEEALEELL 296
 
Name Accession Description Interval E-value
SDR_a8 cd05242
atypical (a) SDRs, subgroup 8; This subgroup contains atypical SDRs of unknown function. ...
2-185 1.71e-83

atypical (a) SDRs, subgroup 8; This subgroup contains atypical SDRs of unknown function. Proteins in this subgroup have a glycine-rich NAD(P)-binding motif consensus that resembles that of the extended SDRs, (GXXGXXG or GGXGXXG), but lacks the characteristic active site residues of the SDRs. A Cys often replaces the usual Lys of the YXXXK active site motif, while the upstream Ser is generally present and Arg replaces the usual Asn. Atypical SDRs generally lack the catalytic residues characteristic of the SDRs, and their glycine-rich NAD(P)-binding motif is often different from the forms normally seen in classical or extended SDRs. Atypical SDRs include biliverdin IX beta reductase (BVR-B,aka flavin reductase), NMRa (a negative transcriptional regulator of various fungi), progesterone 5-beta-reductase like proteins, phenylcoumaran benzylic ether and pinoresinol-lariciresinol reductases, phenylpropene synthases, eugenol synthase, triphenylmethane reductase, isoflavone reductases, and others. SDRs are a functionally diverse family of oxidoreductases that have a single domain with a structurally conserved Rossmann fold, an NAD(P)(H)-binding region, and a structurally diverse C-terminal region. Sequence identity between different SDR enzymes is typically in the 15-30% range; they catalyze a wide range of activities including the metabolism of steroids, cofactors, carbohydrates, lipids, aromatic compounds, and amino acids, and act in redox sensing. Classical SDRs have an TGXXX[AG]XG cofactor binding motif and a YXXXK active site motif, with the Tyr residue of the active site motif serving as a critical catalytic residue (Tyr-151, human 15-hydroxyprostaglandin dehydrogenase numbering). In addition to the Tyr and Lys, there is often an upstream Ser and/or an Asn, contributing to the active site; while substrate binding is in the C-terminal region, which determines specificity. The standard reaction mechanism is a 4-pro-S hydride transfer and proton relay involving the conserved Tyr and Lys, a water molecule stabilized by Asn, and nicotinamide. In addition to the Rossmann fold core region typical of all SDRs, extended SDRs have a less conserved C-terminal extension of approximately 100 amino acids, and typically have a TGXXGXXG cofactor binding motif. Complex (multidomain) SDRs such as ketoreductase domains of fatty acid synthase have a GGXGXXG NAD(P)-binding motif and an altered active site motif (YXXXN). Fungal type ketoacyl reductases have a TGXXXGX(1-2)G NAD(P)-binding motif.


Pssm-ID: 187553 [Multi-domain]  Cd Length: 296  Bit Score: 248.68  E-value: 1.71e-83
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328   2 TAYYQPSLTKEYDEDSPGGnFDFFSNLVTKWEAAARLPGE-STRQVVVRSGVVLGRGGGAISHMLLPFRLGLGGPIGSGR 80
Cdd:cd05242   113 VGYYGHSGDEVLTENSPSG-KDFLAEVCKAWEKAAQPASElGTRVVILRTGVVLGPDGGALPKMLLPFRLGLGGPLGSGR 191
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  81 QFFPWIHIGDLAGILNYALEANHVQGVLNGVAPAStTTNAEFAQALGAALGRPAFIPVPSTVVRAVFGE-RAIMLLEGQK 159
Cdd:cd05242   192 QWMSWIHIDDLVRLIEFAIENPDLSGPVNAVAPNP-VTNAEFTKALGRALHRPAGLPVPAFALKLGFGEmRAELLLKGQR 270
                         170       180
                  ....*....|....*....|....*.
gi 1720380328 160 VVPRRTLATGYQYSFPELRAALKDVV 185
Cdd:cd05242   271 VLPERLLDAGFQFRYPDLEEALEELL 296
yfcH TIGR01777
TIGR01777 family protein; This model represents a clade of proteins of unknown function ...
2-181 3.08e-83

TIGR01777 family protein; This model represents a clade of proteins of unknown function including the E. coli yfcH protein. [Hypothetical proteins, Conserved]


Pssm-ID: 273800 [Multi-domain]  Cd Length: 291  Bit Score: 247.55  E-value: 3.08e-83
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328   2 TAYYQPSLTKEYDEDSPGGNFDFFSNLVTKWEAAARLPGES-TRQVVVRSGVVLGRGGGAISHMLLPFRLGLGGPIGSGR 80
Cdd:TIGR01777 112 VGYYGPSEDREYTEEDSPAGDDFLAELCRDWEEAAQAAEDLgTRVVLLRTGIVLGPKGGALAKMLLPFRLGLGGPLGSGR 191
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  81 QFFPWIHIGDLAGILNYALEANHVQGVLNGVAPAStTTNAEFAQALGAALGRPAFIPVPSTVVRAVFGERAIMLLEGQKV 160
Cdd:TIGR01777 192 QWFSWIHIEDLVQLILFALENASVSGPVNATAPEP-VRNKEFAKALARALHRPAFFPVPAFVLRALLGEMAALLLKGQRV 270
                         170       180
                  ....*....|....*....|.
gi 1720380328 161 VPRRTLATGYQYSFPELRAAL 181
Cdd:TIGR01777 271 LPEKLLEAGFQFQYPDLDEAL 291
YfcH COG1090
NAD dependent epimerase/dehydratase family enzyme [General function prediction only];
4-186 1.21e-79

NAD dependent epimerase/dehydratase family enzyme [General function prediction only];


Pssm-ID: 440707 [Multi-domain]  Cd Length: 298  Bit Score: 238.81  E-value: 1.21e-79
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328   4 YYQPSLTKEYDEDSPGGNfDFFSNLVTKWEAAA-RLPGESTRQVVVRSGVVLGRGGGAISHMLLPFRLGLGGPIGSGRQF 82
Cdd:COG1090   117 YYGDRGDEVLTEDSPPGD-GFLAEVCRAWEAAAaPAEEAGTRVVLLRTGIVLGPDGGALPKLLPPFRLGLGGPLGSGRQW 195
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  83 FPWIHIGDLAGILNYALEANHVQGVLNGVAPAStTTNAEFAQALGAALGRPAFIPVPSTVVRAVFGERAIMLLEGQKVVP 162
Cdd:COG1090   196 MSWIHIDDLVRAILFLLENPDLSGPVNAVAPNP-VTNAEFTRALARVLHRPAFLPVPAFALRLLLGEMAELLLASQRVLP 274
                         170       180
                  ....*....|....*....|....
gi 1720380328 163 RRTLATGYQYSFPELRAALKDVVA 186
Cdd:COG1090   275 KRLLEAGFTFRYPTLEEALRDLLG 298
DUF1731 pfam08338
Domain of unknown function (DUF1731); This domain of unknown function appears towards the ...
138-183 1.92e-16

Domain of unknown function (DUF1731); This domain of unknown function appears towards the C-terminus of proteins of the NAD dependent epimerase/dehydratase family (pfam01370) in bacteria, eukaryotes and archaea. Many of the proteins in which it is found are involved in cell-division inhibition.


Pssm-ID: 462435 [Multi-domain]  Cd Length: 46  Bit Score: 69.33  E-value: 1.92e-16
                          10        20        30        40
                  ....*....|....*....|....*....|....*....|....*.
gi 1720380328 138 VPSTVVRAVFGERAIMLLEGQKVVPRRTLATGYQYSFPELRAALKD 183
Cdd:pfam08338   1 VPAFALRLLLGEMAELLLEGQRVLPKRLLEAGFQFRYPDLEEALRD 46
 
Name Accession Description Interval E-value
SDR_a8 cd05242
atypical (a) SDRs, subgroup 8; This subgroup contains atypical SDRs of unknown function. ...
2-185 1.71e-83

atypical (a) SDRs, subgroup 8; This subgroup contains atypical SDRs of unknown function. Proteins in this subgroup have a glycine-rich NAD(P)-binding motif consensus that resembles that of the extended SDRs, (GXXGXXG or GGXGXXG), but lacks the characteristic active site residues of the SDRs. A Cys often replaces the usual Lys of the YXXXK active site motif, while the upstream Ser is generally present and Arg replaces the usual Asn. Atypical SDRs generally lack the catalytic residues characteristic of the SDRs, and their glycine-rich NAD(P)-binding motif is often different from the forms normally seen in classical or extended SDRs. Atypical SDRs include biliverdin IX beta reductase (BVR-B,aka flavin reductase), NMRa (a negative transcriptional regulator of various fungi), progesterone 5-beta-reductase like proteins, phenylcoumaran benzylic ether and pinoresinol-lariciresinol reductases, phenylpropene synthases, eugenol synthase, triphenylmethane reductase, isoflavone reductases, and others. SDRs are a functionally diverse family of oxidoreductases that have a single domain with a structurally conserved Rossmann fold, an NAD(P)(H)-binding region, and a structurally diverse C-terminal region. Sequence identity between different SDR enzymes is typically in the 15-30% range; they catalyze a wide range of activities including the metabolism of steroids, cofactors, carbohydrates, lipids, aromatic compounds, and amino acids, and act in redox sensing. Classical SDRs have an TGXXX[AG]XG cofactor binding motif and a YXXXK active site motif, with the Tyr residue of the active site motif serving as a critical catalytic residue (Tyr-151, human 15-hydroxyprostaglandin dehydrogenase numbering). In addition to the Tyr and Lys, there is often an upstream Ser and/or an Asn, contributing to the active site; while substrate binding is in the C-terminal region, which determines specificity. The standard reaction mechanism is a 4-pro-S hydride transfer and proton relay involving the conserved Tyr and Lys, a water molecule stabilized by Asn, and nicotinamide. In addition to the Rossmann fold core region typical of all SDRs, extended SDRs have a less conserved C-terminal extension of approximately 100 amino acids, and typically have a TGXXGXXG cofactor binding motif. Complex (multidomain) SDRs such as ketoreductase domains of fatty acid synthase have a GGXGXXG NAD(P)-binding motif and an altered active site motif (YXXXN). Fungal type ketoacyl reductases have a TGXXXGX(1-2)G NAD(P)-binding motif.


Pssm-ID: 187553 [Multi-domain]  Cd Length: 296  Bit Score: 248.68  E-value: 1.71e-83
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328   2 TAYYQPSLTKEYDEDSPGGnFDFFSNLVTKWEAAARLPGE-STRQVVVRSGVVLGRGGGAISHMLLPFRLGLGGPIGSGR 80
Cdd:cd05242   113 VGYYGHSGDEVLTENSPSG-KDFLAEVCKAWEKAAQPASElGTRVVILRTGVVLGPDGGALPKMLLPFRLGLGGPLGSGR 191
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  81 QFFPWIHIGDLAGILNYALEANHVQGVLNGVAPAStTTNAEFAQALGAALGRPAFIPVPSTVVRAVFGE-RAIMLLEGQK 159
Cdd:cd05242   192 QWMSWIHIDDLVRLIEFAIENPDLSGPVNAVAPNP-VTNAEFTKALGRALHRPAGLPVPAFALKLGFGEmRAELLLKGQR 270
                         170       180
                  ....*....|....*....|....*.
gi 1720380328 160 VVPRRTLATGYQYSFPELRAALKDVV 185
Cdd:cd05242   271 VLPERLLDAGFQFRYPDLEEALEELL 296
yfcH TIGR01777
TIGR01777 family protein; This model represents a clade of proteins of unknown function ...
2-181 3.08e-83

TIGR01777 family protein; This model represents a clade of proteins of unknown function including the E. coli yfcH protein. [Hypothetical proteins, Conserved]


Pssm-ID: 273800 [Multi-domain]  Cd Length: 291  Bit Score: 247.55  E-value: 3.08e-83
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328   2 TAYYQPSLTKEYDEDSPGGNFDFFSNLVTKWEAAARLPGES-TRQVVVRSGVVLGRGGGAISHMLLPFRLGLGGPIGSGR 80
Cdd:TIGR01777 112 VGYYGPSEDREYTEEDSPAGDDFLAELCRDWEEAAQAAEDLgTRVVLLRTGIVLGPKGGALAKMLLPFRLGLGGPLGSGR 191
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  81 QFFPWIHIGDLAGILNYALEANHVQGVLNGVAPAStTTNAEFAQALGAALGRPAFIPVPSTVVRAVFGERAIMLLEGQKV 160
Cdd:TIGR01777 192 QWFSWIHIEDLVQLILFALENASVSGPVNATAPEP-VRNKEFAKALARALHRPAFFPVPAFVLRALLGEMAALLLKGQRV 270
                         170       180
                  ....*....|....*....|.
gi 1720380328 161 VPRRTLATGYQYSFPELRAAL 181
Cdd:TIGR01777 271 LPEKLLEAGFQFQYPDLDEAL 291
YfcH COG1090
NAD dependent epimerase/dehydratase family enzyme [General function prediction only];
4-186 1.21e-79

NAD dependent epimerase/dehydratase family enzyme [General function prediction only];


Pssm-ID: 440707 [Multi-domain]  Cd Length: 298  Bit Score: 238.81  E-value: 1.21e-79
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328   4 YYQPSLTKEYDEDSPGGNfDFFSNLVTKWEAAA-RLPGESTRQVVVRSGVVLGRGGGAISHMLLPFRLGLGGPIGSGRQF 82
Cdd:COG1090   117 YYGDRGDEVLTEDSPPGD-GFLAEVCRAWEAAAaPAEEAGTRVVLLRTGIVLGPDGGALPKLLPPFRLGLGGPLGSGRQW 195
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  83 FPWIHIGDLAGILNYALEANHVQGVLNGVAPAStTTNAEFAQALGAALGRPAFIPVPSTVVRAVFGERAIMLLEGQKVVP 162
Cdd:COG1090   196 MSWIHIDDLVRAILFLLENPDLSGPVNAVAPNP-VTNAEFTRALARVLHRPAFLPVPAFALRLLLGEMAELLLASQRVLP 274
                         170       180
                  ....*....|....*....|....
gi 1720380328 163 RRTLATGYQYSFPELRAALKDVVA 186
Cdd:COG1090   275 KRLLEAGFTFRYPTLEEALRDLLG 298
DUF1731 pfam08338
Domain of unknown function (DUF1731); This domain of unknown function appears towards the ...
138-183 1.92e-16

Domain of unknown function (DUF1731); This domain of unknown function appears towards the C-terminus of proteins of the NAD dependent epimerase/dehydratase family (pfam01370) in bacteria, eukaryotes and archaea. Many of the proteins in which it is found are involved in cell-division inhibition.


Pssm-ID: 462435 [Multi-domain]  Cd Length: 46  Bit Score: 69.33  E-value: 1.92e-16
                          10        20        30        40
                  ....*....|....*....|....*....|....*....|....*.
gi 1720380328 138 VPSTVVRAVFGERAIMLLEGQKVVPRRTLATGYQYSFPELRAALKD 183
Cdd:pfam08338   1 VPAFALRLLLGEMAELLLEGQRVLPKRLLEAGFQFRYPDLEEALRD 46
WcaG COG0451
Nucleoside-diphosphate-sugar epimerase [Cell wall/membrane/envelope biogenesis];
13-169 5.79e-10

Nucleoside-diphosphate-sugar epimerase [Cell wall/membrane/envelope biogenesis];


Pssm-ID: 440220 [Multi-domain]  Cd Length: 295  Bit Score: 56.91  E-value: 5.79e-10
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  13 YDEDSPGGNFDFFSnlVTKWEA------AARLPGesTRQVVVRSGVVLGRGG-GAISHMLLPFRLGLGGPI-GSGRQFFP 84
Cdd:COG0451   124 IDEDTPLRPVSPYG--ASKLAAellaraYARRYG--LPVTILRPGNVYGPGDrGVLPRLIRRALAGEPVPVfGDGDQRRD 199
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  85 WIHIGDLAGILNYALEANHVQG-VLNGVAPASTTTNaEFAQALGAALGRPAFI--PVPSTVVRAVF--GERAIMLLEGQk 159
Cdd:COG0451   200 FIHVDDVARAIVLALEAPAAPGgVYNVGGGEPVTLR-ELAEAIAEALGRPPEIvyPARPGDVRPRRadNSKARRELGWR- 277
                         170
                  ....*....|
gi 1720380328 160 vvPRRTLATG 169
Cdd:COG0451   278 --PRTSLEEG 285
SDR_a4 cd05266
atypical (a) SDRs, subgroup 4; Atypical SDRs in this subgroup are poorly defined, one member ...
66-169 3.28e-07

atypical (a) SDRs, subgroup 4; Atypical SDRs in this subgroup are poorly defined, one member is identified as a putative NAD-dependent epimerase/dehydratase. Atypical SDRs are distinct from classical SDRs. Members of this subgroup have a glycine-rich NAD(P)-binding motif that is related to, but is different from, the archetypical SDRs, GXGXXG. This subgroup also lacks most of the characteristic active site residues of the SDRs; however, the upstream Ser is present at the usual place, and some potential catalytic residues are present in place of the usual YXXXK active site motif. Atypical SDRs generally lack the catalytic residues characteristic of the SDRs, and their glycine-rich NAD(P)-binding motif is often different from the forms normally seen in classical or extended SDRs. Atypical SDRs include biliverdin IX beta reductase (BVR-B,aka flavin reductase), NMRa (a negative transcriptional regulator of various fungi), progesterone 5-beta-reductase like proteins, phenylcoumaran benzylic ether and pinoresinol-lariciresinol reductases, phenylpropene synthases, eugenol synthase, triphenylmethane reductase, isoflavone reductases, and others. SDRs are a functionally diverse family of oxidoreductases that have a single domain with a structurally conserved Rossmann fold, an NAD(P)(H)-binding region, and a structurally diverse C-terminal region. Sequence identity between different SDR enzymes is typically in the 15-30% range; they catalyze a wide range of activities including the metabolism of steroids, cofactors, carbohydrates, lipids, aromatic compounds, and amino acids, and act in redox sensing. Classical SDRs have an TGXXX[AG]XG cofactor binding motif and a YXXXK active site motif, with the Tyr residue of the active site motif serving as a critical catalytic residue (Tyr-151, human 15-hydroxyprostaglandin dehydrogenase numbering). In addition to the Tyr and Lys, there is often an upstream Ser and/or an Asn, contributing to the active site; while substrate binding is in the C-terminal region, which determines specificity. The standard reaction mechanism is a 4-pro-S hydride transfer and proton relay involving the conserved Tyr and Lys, a water molecule stabilized by Asn, and nicotinamide. In addition to the Rossmann fold core region typical of all SDRs, extended SDRs have a less conserved C-terminal extension of approximately 100 amino acids, and typically have a TGXXGXXG cofactor binding motif. Complex (multidomain) SDRs such as ketoreductase domains of fatty acid synthase have a GGXGXXG NAD(P)-binding motif and an altered active site motif (YXXXN). Fungal type ketoacyl reductases have a TGXXXGX(1-2)G NAD(P)-binding motif.


Pssm-ID: 187576 [Multi-domain]  Cd Length: 251  Bit Score: 48.86  E-value: 3.28e-07
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  66 LPFRLGLGGPIGSGRQFFPWIHIGDLAGILNYALEANHVQGVLNGVAPASTTTnAEFAQALGAALGRPAFIPVPSTVVRa 145
Cdd:cd05266   160 LRRLAQGTGRPPAGNAPTNRIHVDDLVGALAFALQRPAPGPVYNVVDDLPVTR-GEFYQAAAELLGLPPPPFIPFAFLR- 237
                          90       100
                  ....*....|....*....|....
gi 1720380328 146 vfgeraimllEGQKVVPRRTLATG 169
Cdd:cd05266   238 ----------EGKRVSNDRLKAEL 251
UDP_G4E_3_SDR_e cd05240
UDP-glucose 4 epimerase (G4E), subgroup 3, extended (e) SDRs; Members of this bacterial ...
33-140 1.07e-04

UDP-glucose 4 epimerase (G4E), subgroup 3, extended (e) SDRs; Members of this bacterial subgroup are identified as possible sugar epimerases, such as UDP-glucose 4 epimerase. However, while the NAD(P)-binding motif is fairly well conserved, not all members retain the canonical active site tetrad of the extended SDRs. UDP-glucose 4 epimerase (aka UDP-galactose-4-epimerase), is a homodimeric extended SDR. It catalyzes the NAD-dependent conversion of UDP-galactose to UDP-glucose, the final step in Leloir galactose synthesis. Extended SDRs are distinct from classical SDRs. In addition to the Rossmann fold (alpha/beta folding pattern with a central beta-sheet) core region typical of all SDRs, extended SDRs have a less conserved C-terminal extension of approximately 100 amino acids. Extended SDRs are a diverse collection of proteins, and include isomerases, epimerases, oxidoreductases, and lyases; they typically have a TGXXGXXG cofactor binding motif. SDRs are a functionally diverse family of oxidoreductases that have a single domain with a structurally conserved Rossmann fold, an NAD(P)(H)-binding region, and a structurally diverse C-terminal region. Sequence identity between different SDR enzymes is typically in the 15-30% range; they catalyze a wide range of activities including the metabolism of steroids, cofactors, carbohydrates, lipids, aromatic compounds, and amino acids, and act in redox sensing. Classical SDRs have an TGXXX[AG]XG cofactor binding motif and a YXXXK active site motif, with the Tyr residue of the active site motif serving as a critical catalytic residue (Tyr-151, human 15-hydroxyprostaglandin dehydrogenase numbering). In addition to the Tyr and Lys, there is often an upstream Ser and/or an Asn, contributing to the active site; while substrate binding is in the C-terminal region, which determines specificity. The standard reaction mechanism is a 4-pro-S hydride transfer and proton relay involving the conserved Tyr and Lys, a water molecule stabilized by Asn, and nicotinamide. Atypical SDRs generally lack the catalytic residues characteristic of the SDRs, and their glycine-rich NAD(P)-binding motif is often different from the forms normally seen in classical or extended SDRs. Complex (multidomain) SDRs such as ketoreductase domains of fatty acid synthase have a GGXGXXG NAD(P)-binding motif and an altered active site motif (YXXXN). Fungal type ketoacyl reductases have a TGXXXGX(1-2)G NAD(P)-binding motif.


Pssm-ID: 187551 [Multi-domain]  Cd Length: 306  Bit Score: 41.58  E-value: 1.07e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  33 EAAARLPGesTRQVVVRSGVVLGRGGGAISHMLLPFRLgLGGPIGSGR--QFfpwIHIGDLAGILNYALEANhVQGVLNG 110
Cdd:cd05240   151 EFRRRHPE--LNVTVLRPATILGPGTRNTTRDFLSPRR-LPVPGGFDPpfQF---LHEDDVARALVLAVRAG-ATGIFNV 223
                          90       100       110
                  ....*....|....*....|....*....|
gi 1720380328 111 VAPASTTtnaeFAQALGAALGRPAFIPVPS 140
Cdd:cd05240   224 AGDGPVP----LSLVLALLGRRPVPLPSPL 249
NDUFA9_like_SDR_a cd05271
NADH dehydrogenase (ubiquinone) 1 alpha subcomplex, subunit 9, 39 kDa, (NDUFA9) -like, ...
46-146 3.37e-04

NADH dehydrogenase (ubiquinone) 1 alpha subcomplex, subunit 9, 39 kDa, (NDUFA9) -like, atypical (a) SDRs; This subgroup of extended SDR-like proteins are atypical SDRs. They have a glycine-rich NAD(P)-binding motif similar to the typical SDRs, GXXGXXG, and have the YXXXK active site motif (though not the other residues of the SDR tetrad). Members identified include NDUFA9 (mitochondrial) and putative nucleoside-diphosphate-sugar epimerase. Atypical SDRs generally lack the catalytic residues characteristic of the SDRs, and their glycine-rich NAD(P)-binding motif is often different from the forms normally seen in classical or extended SDRs. Atypical SDRs include biliverdin IX beta reductase (BVR-B,aka flavin reductase), NMRa (a negative transcriptional regulator of various fungi), progesterone 5-beta-reductase like proteins, phenylcoumaran benzylic ether and pinoresinol-lariciresinol reductases, phenylpropene synthases, eugenol synthase, triphenylmethane reductase, isoflavone reductases, and others. SDRs are a functionally diverse family of oxidoreductases that have a single domain with a structurally conserved Rossmann fold, an NAD(P)(H)-binding region, and a structurally diverse C-terminal region. Sequence identity between different SDR enzymes is typically in the 15-30% range; they catalyze a wide range of activities including the metabolism of steroids, cofactors, carbohydrates, lipids, aromatic compounds, and amino acids, and act in redox sensing. Classical SDRs have an TGXXX[AG]XG cofactor binding motif and a YXXXK active site motif, with the Tyr residue of the active site motif serving as a critical catalytic residue (Tyr-151, human 15-hydroxyprostaglandin dehydrogenase numbering). In addition to the Tyr and Lys, there is often an upstream Ser and/or an Asn, contributing to the active site; while substrate binding is in the C-terminal region, which determines specificity. The standard reaction mechanism is a 4-pro-S hydride transfer and proton relay involving the conserved Tyr and Lys, a water molecule stabilized by Asn, and nicotinamide. In addition to the Rossmann fold core region typical of all SDRs, extended SDRs have a less conserved C-terminal extension of approximately 100 amino acids, and typically have a TGXXGXXG cofactor binding motif. Complex (multidomain) SDRs such as ketoreductase domains of fatty acid synthase have a GGXGXXG NAD(P)-binding motif and an altered active site motif (YXXXN). Fungal type ketoacyl reductases have a TGXXXGX(1-2)G NAD(P)-binding motif.


Pssm-ID: 187579 [Multi-domain]  Cd Length: 273  Bit Score: 39.92  E-value: 3.37e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  46 VVVRSGVVLGRGGGAISHML-LPFRLGLGGPIGSGRQFFPWIHIGDLA-GILNYALEANHVQGVLNGVAPASTTTnAEFA 123
Cdd:cd05271   145 TIVRPSVVFGREDRFLNRFAkLLAFLPFPPLIGGGQTKFQPVYVGDVAeAIARALKDPETEGKTYELVGPKVYTL-AELV 223
                          90       100
                  ....*....|....*....|....
gi 1720380328 124 QALGAALGRPA-FIPVPSTVVRAV 146
Cdd:cd05271   224 ELLRRLGGRKRrVLPLPLWLARLI 247
SDR_a7 cd05262
atypical (a) SDRs, subgroup 7; This subgroup contains atypical SDRs of unknown function. ...
46-177 8.43e-04

atypical (a) SDRs, subgroup 7; This subgroup contains atypical SDRs of unknown function. Members of this subgroup have a glycine-rich NAD(P)-binding motif consensus that matches the extended SDRs, TGXXGXXG, but lacks the characteristic active site residues of the SDRs. This subgroup has basic residues (HXXXR) in place of the active site motif YXXXK, these may have a catalytic role. Atypical SDRs generally lack the catalytic residues characteristic of the SDRs, and their glycine-rich NAD(P)-binding motif is often different from the forms normally seen in classical or extended SDRs. Atypical SDRs include biliverdin IX beta reductase (BVR-B,aka flavin reductase), NMRa (a negative transcriptional regulator of various fungi), progesterone 5-beta-reductase like proteins, phenylcoumaran benzylic ether and pinoresinol-lariciresinol reductases, phenylpropene synthases, eugenol synthase, triphenylmethane reductase, isoflavone reductases, and others. SDRs are a functionally diverse family of oxidoreductases that have a single domain with a structurally conserved Rossmann fold, an NAD(P)(H)-binding region, and a structurally diverse C-terminal region. Sequence identity between different SDR enzymes is typically in the 15-30% range; they catalyze a wide range of activities including the metabolism of steroids, cofactors, carbohydrates, lipids, aromatic compounds, and amino acids, and act in redox sensing. Classical SDRs have an TGXXX[AG]XG cofactor binding motif and a YXXXK active site motif, with the Tyr residue of the active site motif serving as a critical catalytic residue (Tyr-151, human 15-hydroxyprostaglandin dehydrogenase numbering). In addition to the Tyr and Lys, there is often an upstream Ser and/or an Asn, contributing to the active site; while substrate binding is in the C-terminal region, which determines specificity. The standard reaction mechanism is a 4-pro-S hydride transfer and proton relay involving the conserved Tyr and Lys, a water molecule stabilized by Asn, and nicotinamide. In addition to the Rossmann fold core region typical of all SDRs, extended SDRs have a less conserved C-terminal extension of approximately 100 amino acids, and typically have a TGXXGXXG cofactor binding motif. Complex (multidomain) SDRs such as ketoreductase domains of fatty acid synthase have a GGXGXXG NAD(P)-binding motif and an altered active site motif (YXXXN). Fungal type ketoacyl reductases have a TGXXXGX(1-2)G NAD(P)-binding motif.


Pssm-ID: 187572 [Multi-domain]  Cd Length: 291  Bit Score: 38.87  E-value: 8.43e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1720380328  46 VVVRSGVVLGRG-GGAISHMLL-PFRLGLGGPIGSGRQFFPWIHIGDLAGILNYALEANHVQGVLNGVAPASTTTnAEFA 123
Cdd:cd05262   155 VVRLPPVVHGRGdHGFVPMLIAiAREKGVSAYVGDGKNRWPAVHRDDAARLYRLALEKGKAGSVYHAVAEEGIPV-KDIA 233
                          90       100       110       120       130
                  ....*....|....*....|....*....|....*....|....*....|....*
gi 1720380328 124 QALGAALGRPAfIPVPSTVVRAVFGERAIMLLEGQKVVPRRTL-ATGYQYSFPEL 177
Cdd:cd05262   234 EAIGRRLGVPV-VSIPAEEAAAHFGWLAMFVALDQPVSSQKTRrRLGWKPQQPSL 287
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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