X-ray diffraction
1.65Å resolution

1.65A resolution structure of Norwalk Virus Protease Containing a covalently bound dipeptidyl inhibitor


Function and Biology Details

Reactions catalysed:
Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1)
Endopeptidase with a preference for cleavage when the P1 position is occupied by Glu-|- and the P1' position is occupied by Gly-|-
NTP + H(2)O = NDP + phosphate
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assemblies composition:
monomeric (preferred)
homo dimer
Entry contents:
1 distinct polypeptide molecule
3C-like protease Chains: A, B
Molecule details ›
Chains: A, B
Length: 188 amino acids
Theoretical weight: 20.13 KDa
Source organism: Norovirus Hu/1968/US
Expression system: Escherichia coli BL21
  • Canonical: Q83883 (Residues: 1101-1281; Coverage: 10%)
Gene name: ORF1
Structure domains: Trypsin-like serine proteases

Ligands and Environments

2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 17-ID
Spacegroup: P212121
Unit cell:
a: 37.649Å b: 66.865Å c: 125.109Å
α: 90° β: 90° γ: 90°
R R work R free
0.179 0.178 0.212
Expression system: Escherichia coli BL21