8c0g

X-ray diffraction
1.88Å resolution

SARS-CoV nsp16-nsp10 complexed with N7-GTP

Released:
Entry authors: Ferron F, Debarnot C, Coutard B, Canard B, Marseilles Structural Genomics Program @ AFMB (MSGP)

Function and Biology Details

Reactions catalysed:
S-adenosyl-L-methionine + a 5'-(5'-triphosphoguanosine)-[mRNA] = S-adenosyl-L-homocysteine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)-[mRNA]
S-adenosyl-L-methionine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)-(ribonucleotide)-[mRNA] = S-adenosyl-L-homocysteine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)-(2'-O-methyl-ribonucleotide)-[mRNA]
Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1)
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.
ATP + H(2)O = ADP + phosphate
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
PDBe Complex ID:
PDB-CPX-533576 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
2'-O-methyltransferase nsp16 Chain: A
Molecule details ›
Chain: A
Length: 292 amino acids
Theoretical weight: 32.87 KDa
Source organism: Severe acute respiratory syndrome-related coronavirus
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0C6X7 (Residues: 6776-7067; Coverage: 4%)
Gene names: 1a-1b, rep
Sequence domains: Coronavirus 2'-O-methyltransferase
Non-structural protein 10 Chain: B
Molecule details ›
Chain: B
Length: 122 amino acids
Theoretical weight: 13.05 KDa
Source organism: Severe acute respiratory syndrome-related coronavirus
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0C6X7 (Residues: 4240-4361; Coverage: 2%)
Gene names: 1a-1b, rep
Sequence domains: Coronavirus RNA synthesis protein NSP10

Ligands and Environments

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE ID23-1
Spacegroup: C2221
Unit cell:
a: 67.232Å b: 185.042Å c: 128.577Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.246 0.245 0.262
Expression system: Escherichia coli BL21(DE3)