› 2isk

X-ray diffraction
2.1Å resolution

BluB bound to flavin anion (charge transfer complex)

Released:
DOI: 10.2210/pdb2isk/pdb
PDB entry 2isk coloured by chain, front view.
PDB entry 2isk coloured by chain, side view.
PDB entry 2isk coloured by chain, top view.
Source organism: Sinorhizobium meliloti
Primary publication:
BluB cannibalizes flavin to form the lower ligand of vitamin B12.
Taga ME, Larsen NA, Howard-Jones AR, Walsh CT, Walker GC
Nature 446 449-53 (2007)
PMID: 17377583

Function and Biology Details

Reaction catalysed: 
FMNH(2) + NADH + O(2) = 5,6-dimethylbenzimidazole + D-erythrose 4-phosphate + NAD(+) + other product(s)
Biochemical function:
Biological process:
Cellular component:
  • not assigned
Sequence domains:

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-187904 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
5,6-dimethylbenzimidazole synthase Chains: A, B, C, D, E, F, G, H
Molecule details ›
Chains: A, B, C, D, E, F, G, H
Length: 230 amino acids
Theoretical weight: 25.82 KDa
Source organism: Sinorhizobium meliloti
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: Q92PC8 (Residues: 1-227; Coverage: 100%)
Gene names: R01841, SMc00166, bluB
Sequence domains: Nitroreductase family
Structure domains: NADH Oxidase

Ligands and Environments

1 bound ligand:
Ligand FNR 8 x FNR
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 8.2.2
Spacegroup: P21
Unit cell:
a: 63.449Å b: 169.872Å c: 90.954Å
α: 90° β: 89.99° γ: 90°
R-values:
R R work R free
0.206 0.204 0.25
Expression system: Escherichia coli BL21(DE3)

Quick links

Citations

20 review citations

Molecular determinants of a symbiotic chronic infection.
Gibson et al. (2008)
19 more

3 mentions without citation

BluB cannibalizes flavin to form the lower ligand of vitamin B12.
Taga et al. (2007)
2 more