2g9t

X-ray diffraction
2.1Å resolution

Crystal structure of the SARS coronavirus nsp10 at 2.1A

Released:

Function and Biology Details

Reactions catalysed:
GTP + a 5'-diphospho-[mRNA] = diphosphate + a 5'-(5'-triphosphoguanosine)-[mRNA]
Thiol-dependent hydrolysis of ester, thioester, amide, peptide and isopeptide bonds formed by the C-terminal Gly of ubiquitin (a 76-residue protein attached to proteins as an intracellular targeting signal).
TSAVLQ-|-SGFRK-NH(2) and SGVTFQ-|-GKFKK the two peptides corresponding to the two self-cleavage sites of the SARS 3C-like proteinase are the two most reactive peptide substrates. The enzyme exhibits a strong preference for substrates containing Gln at P1 position and Leu at P2 position.
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo dodecamer (preferred)
PDBe Complex ID:
PDB-CPX-143076 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Non-structural protein 10 Chains: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X
Molecule details ›
Chains: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X
Length: 152 amino acids
Theoretical weight: 16.14 KDa
Source organism: Severe acute respiratory syndrome-related coronavirus
Expression system: Escherichia coli
UniProt:
  • Canonical: P0C6U8 (Residues: 4231-4382; Coverage: 4%)
Gene name: 1a
Sequence domains: Coronavirus RNA synthesis protein NSP10

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 19-ID
Spacegroup: C2221
Unit cell:
a: 159.111Å b: 321.829Å c: 161.957Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.22 0.217 0.247
Expression system: Escherichia coli