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1NW9

STRUCTURE OF CASPASE-9 IN AN INHIBITORY COMPLEX WITH XIAP-BIR3

Functional Information from GO Data
ChainGOidnamespacecontents
B0004197molecular_functioncysteine-type endopeptidase activity
B0006508biological_processproteolysis
B0008234molecular_functioncysteine-type peptidase activity
Functional Information from PDB Data
site_idAC1
Number of Residues4
DetailsBINDING SITE FOR RESIDUE ZN A 501
ChainResidue
ACYS300
ACYS303
AHIS320
ACYS327

Functional Information from PROSITE/UniProt
site_idPS01121
Number of Residues15
DetailsCASPASE_HIS Caspase family histidine active site. HgaldCcvVvILSHG
ChainResidueDetails
BHIS224-GLY238

site_idPS01122
Number of Residues12
DetailsCASPASE_CYS Caspase family cysteine active site. KPKLFFIQACGG
ChainResidueDetails
BLYS278-GLY289

site_idPS01282
Number of Residues66
DetailsBIR_REPEAT_1 BIR repeat. YeaRiftfgt.Wiysvnkeqlar...AGFyAlgegDkvkCfhCgggltdWkpsedpweqHakwyPgCkyL
ChainResidueDetails
ATYR265-LEU330

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues65
DetailsRepeat: {"description":"BIR 3"}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues15
DetailsRegion: {"description":"Required for interaction with SEPTIN4 isoform ARTS","evidences":[{"source":"PubMed","id":"21695558","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues4
DetailsBinding site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU00029","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues3
DetailsCross-link: {"description":"Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)","evidences":[{"source":"PubMed","id":"12747801","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues2
DetailsActive site: {"evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues1
DetailsModified residue: {"description":"Phosphotyrosine; by ABL1","evidences":[{"source":"PubMed","id":"15657060","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues1
DetailsModified residue: {"description":"(Microbial infection) ADP-riboxanated arginine","evidences":[{"source":"PubMed","id":"35338844","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"35446120","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues5
Detailsa catalytic site defined by CSA, PubMed 10745077, 10578173
ChainResidueDetails
BCYS287
BCYS287
BGLY238
BHIS237
BARG178

site_idMCSA1
Number of Residues4
DetailsM-CSA 816
ChainResidueDetails
BARG178electrostatic stabiliser
BHIS237proton acceptor, proton donor
BGLY238electrostatic stabiliser
BCYS287nucleofuge, nucleophile, proton acceptor, proton donor

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PDB entries from 2025-12-10

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