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1QJG

Crystal structure of delta5-3-ketosteroid isomerase from Pseudomonas testosteroni in complex with equilenin

Functional Information from GO Data
ChainGOidnamespacecontents
A0004769molecular_functionsteroid Delta-isomerase activity
A0006629biological_processlipid metabolic process
A0008202biological_processsteroid metabolic process
A0016853molecular_functionisomerase activity
B0004769molecular_functionsteroid Delta-isomerase activity
B0006629biological_processlipid metabolic process
B0008202biological_processsteroid metabolic process
B0016853molecular_functionisomerase activity
C0004769molecular_functionsteroid Delta-isomerase activity
C0006629biological_processlipid metabolic process
C0008202biological_processsteroid metabolic process
C0016853molecular_functionisomerase activity
D0004769molecular_functionsteroid Delta-isomerase activity
D0006629biological_processlipid metabolic process
D0008202biological_processsteroid metabolic process
D0016853molecular_functionisomerase activity
E0004769molecular_functionsteroid Delta-isomerase activity
E0006629biological_processlipid metabolic process
E0008202biological_processsteroid metabolic process
E0016853molecular_functionisomerase activity
F0004769molecular_functionsteroid Delta-isomerase activity
F0006629biological_processlipid metabolic process
F0008202biological_processsteroid metabolic process
F0016853molecular_functionisomerase activity
Functional Information from PDB Data
site_idAC1
Number of Residues2
DetailsBINDING SITE FOR RESIDUE SO4 B 1140
ChainResidue
BHIS6
BARG13

site_idAC2
Number of Residues7
DetailsBINDING SITE FOR RESIDUE EQU A 130
ChainResidue
ATYR14
AASN38
APHE82
APHE86
AASP99
AMET112
APHE116

site_idAC3
Number of Residues12
DetailsBINDING SITE FOR RESIDUE EQU B 130
ChainResidue
BTYR14
BASN38
BSER58
BPHE82
BVAL84
BVAL95
BASP99
BMET112
BPHE116
BHOH2044
DARG13
DALA20

site_idAC4
Number of Residues6
DetailsBINDING SITE FOR RESIDUE EQU C 130
ChainResidue
CTYR14
CASN38
CPHE82
CPRO97
CASP99
CMET112

site_idAC5
Number of Residues6
DetailsBINDING SITE FOR RESIDUE EQU D 130
ChainResidue
DTYR14
DASN38
DPHE86
DASP99
DMET112
DPHE116

site_idAC6
Number of Residues8
DetailsBINDING SITE FOR RESIDUE EQU E 130
ChainResidue
CALA20
CHOH2006
ETYR14
EASN38
ELEU61
EASP99
EMET112
EPHE116

site_idAC7
Number of Residues6
DetailsBINDING SITE FOR RESIDUE EQU F 130
ChainResidue
FTYR14
FASN38
FPHE86
FASP99
FMET112
FPHE116

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues6
DetailsActive site: {"description":"Proton donor"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues6
DetailsActive site: {"description":"Proton acceptor","evidences":[{"source":"PubMed","id":"3480517","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues6
DetailsBinding site: {}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues5
DetailsAnnotated By Reference To The Literature 1e3v
ChainResidueDetails
AASN38
APHE30
ATYR14
AASP99
ATYR55

site_idCSA2
Number of Residues5
DetailsAnnotated By Reference To The Literature 1e3v
ChainResidueDetails
BASN38
BPHE30
BTYR14
BASP99
BTYR55

site_idCSA3
Number of Residues5
DetailsAnnotated By Reference To The Literature 1e3v
ChainResidueDetails
CASN38
CPHE30
CTYR14
CASP99
CTYR55

site_idCSA4
Number of Residues5
DetailsAnnotated By Reference To The Literature 1e3v
ChainResidueDetails
DASN38
DPHE30
DTYR14
DASP99
DTYR55

site_idCSA5
Number of Residues5
DetailsAnnotated By Reference To The Literature 1e3v
ChainResidueDetails
EASN38
EPHE30
ETYR14
EASP99
ETYR55

site_idCSA6
Number of Residues5
DetailsAnnotated By Reference To The Literature 1e3v
ChainResidueDetails
FASN38
FPHE30
FTYR14
FASP99
FTYR55

249697

PDB entries from 2026-02-25

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