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3NBR

Crystal Structure of Ketosteroid Isomerase D38NP39GD99N from Pseudomonas Testosteroni (tKSI) with 4-Androstene-3,17-dione Bound

Functional Information from GO Data
ChainGOidnamespacecontents
A0004769molecular_functionsteroid Delta-isomerase activity
A0006629biological_processlipid metabolic process
A0008202biological_processsteroid metabolic process
A0016853molecular_functionisomerase activity
Functional Information from PDB Data
site_idAC1
Number of Residues2
DetailsBINDING SITE FOR RESIDUE SO4 A 126
ChainResidue
AHIS122
AALA123

site_idAC2
Number of Residues4
DetailsBINDING SITE FOR RESIDUE SO4 A 127
ChainResidue
AHIS100
AHIS100
AARG113
ALEU115

site_idAC3
Number of Residues5
DetailsBINDING SITE FOR RESIDUE SO4 A 128
ChainResidue
AASN57
AGLY105
AARG45
AGLU53
APHE54

site_idAC4
Number of Residues11
DetailsBINDING SITE FOR RESIDUE ASD A 129
ChainResidue
AASN2
ATYR14
AASN38
ASER58
APHE86
AVAL95
AASN99
AMET112
APHE116
AHOH191
AHOH192

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsActive site: {"description":"Proton donor"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues1
DetailsActive site: {"description":"Proton acceptor","evidences":[{"source":"PubMed","id":"3480517","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsBinding site: {}
ChainResidueDetails

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PDB entries from 2025-11-05

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