Structure of PDB 3snc Chain A

Receptor sequence

>3sncA (length=306)

SGFRKMAFPSGKVEGCMVQVTCGTTTLNGLWLDDTVYCPRHVICTAEDML
NPNYEDLLIRKSNHSFLVQAGNVQLRVIGHSMQNCLLRLKVDTSNPKTPK
YKFVRIQPGQTFSVLACYNGSPSGVYQCAMRPNHTIKGSFLNGSCGSVGF
NIDYDCVSFCYMHHMELPTGVHAGTDLEGKFYGPFVDRQTAQAAGTDTTI
TLNVLAWLYAAVINGDRWFLNRFTTTLNDFNLVAMKYNYEPLTQDHVDIL
GPLSAQTGIAVLDMCAALKELLQNGMNGRTILGSTILEDEFTPFDVVRQC
SGVTFQ

3D structure

• PDB: 3snc Peptide aldehyde inhibitors challenge the substrate specificity of the SARS-coronavirus main protease.
• Chain: A
• Resolution: 2.58 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): H41 G143 C145
• Catalytic site (residue number reindexed from 1): H41 G143 C145
• Enzyme Commision number: 2.1.1.-
  2.1.1.56: mRNA (guanine-N(7))-methyltransferase.
  2.1.1.57: methyltransferase cap1.
  2.7.7.48: RNA-directed RNA polymerase.
  2.7.7.50: mRNA guanylyltransferase.
  3.1.13.-
  3.4.19.12: ubiquitinyl hydrolase 1.
  3.4.22.-
  3.4.22.69: SARS coronavirus main proteinase.
  3.6.4.12: DNA helicase.
  3.6.4.13: RNA helicase.
  4.6.1.-

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	peptide	A	M49 F140 L141 N142 C145 H163 H164 M165 E166 Q189 T190 A191	M49 F140 L141 N142 C145 H163 H164 M165 E166 Q189 T190 A191

Gene Ontology

Molecular Function

• GO:0008233 peptidase activity

Biological Process

• GO:0019082 viral protein processing

External links

• PDB: RCSB:3snc, PDBe:3snc, PDBj:3snc
• PDBsum: 3snc
• PubMed: 21854807
• UniProt: P0C6X7|R1AB_SARS Replicase polyprotein 1ab (Gene Name=rep)