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6XB0

Room temperature X-ray crystallography reveals catalytic cysteine in the SARS-CoV-2 3CL Mpro is highly reactive: Insights for enzyme mechanism and drug design

Functional Information from GO Data
ChainGOidnamespacecontents
A0008233molecular_functionpeptidase activity
A0019082biological_processviral protein processing
Functional Information from PDB Data
site_idAC1
Number of Residues7
Detailsbinding site for residue DMS A 401
ChainResidue
AMET6
AALA7
APHE8
ASER123
AGLN127
AARG298
AHOH539

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsACT_SITE: For 3CL-PRO activity => ECO:0000255|PROSITE-ProRule:PRU00772, ECO:0000305|PubMed:32198291
ChainResidueDetails
AHIS41

site_idSWS_FT_FI2
Number of Residues1
DetailsACT_SITE: Nucleophile; for 3CL-PRO activity => ECO:0000255|PROSITE-ProRule:PRU00772, ECO:0000269|PubMed:32198291
ChainResidueDetails
A2CO145

site_idSWS_FT_FI3
Number of Residues1
DetailsSITE: Cleavage; by 3CL-PRO => ECO:0000250|UniProtKB:P0C6V3
ChainResidueDetails
AGLN306

site_idSWS_FT_FI4
Number of Residues3
DetailsCROSSLNK: Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) => ECO:0000269|PubMed:39223933
ChainResidueDetails
ALYS5
ALYS90

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PDB entries from 2025-06-11

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