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2HAL

An episulfide cation (thiiranium ring) trapped in the active site of HAV 3C proteinase inactivated by peptide-based ketone inhibitors

Functional Information from GO Data
ChainGOidnamespacecontents
A0004197molecular_functioncysteine-type endopeptidase activity
A0006508biological_processproteolysis
Functional Information from PDB Data
site_idAC1
Number of Residues12
DetailsBINDING SITE FOR RESIDUE BBL A 901
ChainResidue
AALA6
AHOH1035
AHOH1108
AHOH1291
ALEU8
AARG10
AARG97
AHIS102
APRO127
AMET128
ALEU129
AHOH1017

site_idAC2
Number of Residues20
DetailsBINDING SITE FOR CHAIN I OF N-ACETYL-LEUCYL-PHENYLALANYL-PHENYLALANYL-GLUTAMATE-FLUOROMETHYLKETONE INHIBITOR
ChainResidue
AGLU139
AVAL144
AHIS145
ALYS146
AARG162
AGLY167
ALEU168
APRO169
AGLY170
AMET171
ACYS172
AALA193
AGLY194
AGLY195
AASN196
AILE198
AVAL200
AHOH973
IHOH72
IHOH301

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues3
DetailsACT_SITE: For protease 3C activity => ECO:0000255|PROSITE-ProRule:PRU01222
ChainResidueDetails
AHIS44
AASP84
ACYS172

237735

PDB entries from 2025-06-18

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