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1QTN

CRYSTAL STRUCTURE OF THE COMPLEX OF CASPASE-8 WITH THE TETRAPEPTIDE INHIBITOR ACE-IETD-ALDEHYDE

Functional Information from GO Data
ChainGOidnamespacecontents
A0004197molecular_functioncysteine-type endopeptidase activity
A0006508biological_processproteolysis
A0008234molecular_functioncysteine-type peptidase activity
B0004197molecular_functioncysteine-type endopeptidase activity
B0006508biological_processproteolysis
B0008234molecular_functioncysteine-type peptidase activity
Functional Information from PDB Data
site_idAC1
Number of Residues9
DetailsBINDING SITE FOR RESIDUE DTD B 505
ChainResidue
ATYR334
ATHR337
BGLU396
BPHE399
BLEU401
BTHR469
BHOH657
BHOH681
BHOH690

site_idAC2
Number of Residues6
DetailsBINDING SITE FOR RESIDUE DTD A 506
ChainResidue
ALYS231
APRO232
AHIS278
AGLU290
AGLU294
AHOH714

site_idAC3
Number of Residues21
DetailsBINDING SITE FOR CHAIN C OF ACETYL-ILE-GLU-THR-ASP-ALDEHYDE
ChainResidue
AARG260
AHIS317
AGLY318
AGLN358
ACYS360
AHOH694
BSER411
BTYR412
BARG413
BPRO415
BTRP420
BHOH665
CHOH632
CHOH675
CHOH677
CHOH759
CHOH797
CHOH878
CHOH890
CHOH909
CHOH914

Functional Information from PROSITE/UniProt
site_idPS01121
Number of Residues15
DetailsCASPASE_HIS Caspase family histidine active site. HsnmdCfiCcILSHG
ChainResidueDetails
AHIS304-GLY318

site_idPS01122
Number of Residues12
DetailsCASPASE_CYS Caspase family cysteine active site. KPKVFFIQACQG
ChainResidueDetails
ALYS351-GLY362

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues2
DetailsActive site: {"evidences":[{"source":"PubMed","id":"10508785","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues1
DetailsModified residue: {"description":"N6-acetyllysine","evidences":[{"source":"UniProtKB","id":"O89110","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsModified residue: {"description":"Phosphotyrosine","evidences":[{"source":"PubMed","id":"15592455","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI4
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 Residues4
Detailsa catalytic site defined by CSA, PubMed 10508785
ChainResidueDetails
AGLY350
AHIS317
ACYS360
AARG258

site_idMCSA1
Number of Residues
DetailsM-CSA 818
ChainResidueDetails
AARG258electrostatic stabiliser
AHIS317proton acceptor, proton donor
AGLY318electrostatic stabiliser
ACYS360nucleofuge, nucleophile, proton acceptor, proton donor

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PDB entries from 2026-03-04

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