1sg9

X-ray diffraction
2.3Å resolution

Crystal structure of Thermotoga maritima protein HEMK, an N5-glutamine methyltransferase

Released:

Function and Biology Details

Reaction catalysed:
S-adenosyl-L-methionine + [peptide chain release factor 1 or 2]-L-glutamine = S-adenosyl-L-homocysteine + [peptide chain release factor 1 or 2]-N(5)-methyl-L-glutamine
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo dimer (preferred)
PDBe Complex ID:
PDB-CPX-194553 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Release factor glutamine methyltransferase Chains: A, B, C
Molecule details ›
Chains: A, B, C
Length: 282 amino acids
Theoretical weight: 31.65 KDa
Source organism: Thermotoga maritima
Expression system: Escherichia coli
UniProt:
  • Canonical: Q9WYV8 (Residues: 1-282; Coverage: 100%)
Gene names: TM_0488, prmC
Sequence domains:
Structure domains:

Ligands and Environments


Cofactor: Ligand SAM 3 x SAM
1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X6A
Spacegroup: I222
Unit cell:
a: 81.025Å b: 188.332Å c: 207.684Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.235 0.235 0.261
Expression system: Escherichia coli