X-ray diffraction
1.79Å resolution

Crystal structure of Streptomyces tokunonesis TokK with hydroxycobalamin, 5'-deoxyadenosine, and methionine

Source organism: Streptomyces tokunonensis
Entry authors: Knox HL, Booker SJ, Boal AK

Function and Biology Details

Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Methyltransferase TokK Chains: A, B
Molecule details ›
Chains: A, B
Length: 681 amino acids
Theoretical weight: 77.46 KDa
Source organism: Streptomyces tokunonensis
Expression system: Escherichia coli
  • Canonical: A0A6B9HEI0 (Residues: 1-681; Coverage: 100%)
Gene name: tokK
Sequence domains: B12 binding domain

Ligands and Environments

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 23-ID-B
Spacegroup: P21
Unit cell:
a: 68.644Å b: 137.739Å c: 77.914Å
α: 90° β: 90.47° γ: 90°
R R work R free
0.165 0.165 0.193
Expression system: Escherichia coli