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1XEL

UDP-GALACTOSE 4-EPIMERASE FROM ESCHERICHIA COLI

Functional Information from GO Data
ChainGOidnamespacecontents
A0003978molecular_functionUDP-glucose 4-epimerase activity
A0005515molecular_functionprotein binding
A0005737cellular_componentcytoplasm
A0005829cellular_componentcytosol
A0005975biological_processcarbohydrate metabolic process
A0005996biological_processmonosaccharide metabolic process
A0006012biological_processgalactose metabolic process
A0009242biological_processcolanic acid biosynthetic process
A0016853molecular_functionisomerase activity
A0016857molecular_functionracemase and epimerase activity, acting on carbohydrates and derivatives
A0033499biological_processgalactose catabolic process via UDP-galactose, Leloir pathway
A0042802molecular_functionidentical protein binding
A0070403molecular_functionNAD+ binding
Functional Information from PDB Data
site_idAC1
Number of Residues6
DetailsBINDING SITE FOR RESIDUE NA A 352
ChainResidue
AGLN91
AHOH392
AHOH393
AHOH534
AHOH616
AHOH749

site_idAC2
Number of Residues5
DetailsBINDING SITE FOR RESIDUE NA A 353
ChainResidue
AHOH546
AHOH596
AGLN334
AHOH542
AHOH545

site_idAC3
Number of Residues31
DetailsBINDING SITE FOR RESIDUE NAD A 340
ChainResidue
AGLY7
AGLY10
ATYR11
AILE12
AASP31
AASN32
ALEU33
ACYS34
AASN35
ASER36
AGLY57
AASP58
AILE59
APHE80
AALA81
AGLY82
ALYS84
AASN99
ASER122
ASER123
ATYR149
ALYS153
ATYR177
APRO180
AUPG341
AEDO351
AHOH355
AHOH379
AHOH382
AHOH411
AHOH514

site_idAC4
Number of Residues29
DetailsBINDING SITE FOR RESIDUE UPG A 341
ChainResidue
ASER124
ATHR126
ATYR149
APHE178
AASN179
AASN198
AASN199
ALEU200
ALEU215
AALA216
AILE217
APHE218
AGLY229
AARG231
ATYR233
AVAL269
AARG292
AASP295
ATYR299
ANAD340
AHOH414
AHOH428
AHOH499
AHOH501
AHOH527
AHOH549
AHOH570
AHOH597
AHOH724

site_idAC5
Number of Residues7
DetailsBINDING SITE FOR RESIDUE EDO A 351
ChainResidue
ATYR11
AASN35
AGLY190
AASP192
ANAD340
AHOH356
AHOH421

site_idAC6
Number of Residues5
DetailsBINDING SITE FOR RESIDUE PEG A 354
ChainResidue
ALEU250
ALYS253
ATYR259
AGLU309
AHOH614

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsActive site: {"description":"Proton acceptor","evidences":[{"source":"PubMed","id":"8611497","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues14
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"12019271","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"1579570","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"8611497","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"8611559","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"8931134","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"9174344","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"9271498","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"9271499","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"9708982","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues11
DetailsBinding site: {}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues3
DetailsAnnotated By Reference To The Literature 1eq2
ChainResidueDetails
ATYR149
ASER124
ALYS153

site_idCSA2
Number of Residues4
DetailsAnnotated By Reference To The Literature 1eq2
ChainResidueDetails
AASN100
ATHR126
ATYR149
ALYS153

site_idCSA3
Number of Residues2
DetailsAnnotated By Reference To The Literature 1eq2
ChainResidueDetails
AGLN146
ALYS153

site_idCSA4
Number of Residues2
DetailsAnnotated By Reference To The Literature 1eq2
ChainResidueDetails
ATYR149
ALYS153

site_idMCSA1
Number of Residues3
DetailsM-CSA 188
ChainResidueDetails
ASER124activator, electrostatic stabiliser, hydrogen bond acceptor, hydrogen bond donor, proton acceptor, proton donor, proton relay
ATYR149hydrogen bond acceptor, hydrogen bond donor, proton acceptor, proton donor
ALYS153activator, hydrogen bond donor

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PDB entries from 2026-01-28

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