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6TZD

Crystal Structure of Ketosteroid Isomerase from Pseudomonas Putida (pKSI) bound to 4-Androstenedione at 280 K

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
Functional Information from PDB Data
site_idAC1
Number of Residues8
Detailsbinding site for residue ASD B 201
ChainResidue
BTYR16
BASP40
BPHE86
BMET90
BLEU99
BASP103
BMET116
BTRP120

site_idAC2
Number of Residues5
Detailsbinding site for residue CL B 202
ChainResidue
AHOH379
BGLY72
BARG75
BHOH341
ATHR71

site_idAC3
Number of Residues4
Detailsbinding site for residue CL A 201
ChainResidue
AGLY72
AARG75
BTHR71
BHOH341

site_idAC4
Number of Residues10
Detailsbinding site for residue ASD A 202
ChainResidue
ATYR16
AASP40
APHE86
AMET90
ALEU99
AASP103
ATRP120
AHOH308
AHOH325
BASN93

site_idAC5
Number of Residues6
Detailsbinding site for residue MG A 203
ChainResidue
AHOH304
AHOH322
AHOH333
AHOH360
AHOH371
AHOH374

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues2
DetailsActive site: {"description":"Proton donor"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsActive site: {"description":"Proton acceptor"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"11007792","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idMCSA1
Number of Residues4
DetailsM-CSA 349
ChainResidueDetails
ATYR16proton acceptor, proton donor
AASP40proton acceptor, proton donor
AASP100electrostatic stabiliser
AASP103electrostatic stabiliser

site_idMCSA2
Number of Residues4
DetailsM-CSA 349
ChainResidueDetails
BTYR16proton acceptor, proton donor
BASP40proton acceptor, proton donor
BASP100electrostatic stabiliser
BASP103electrostatic stabiliser

249697

PDB entries from 2026-02-25

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