X-ray diffraction
2.5Å resolution

Ketol-acid reductoisomerase from Alicyclobacillus acidocaldarius

Entry authors: Cahn JKB, Brinkmann-Chen S, Arnold FH

Function and Biology Details

Reaction catalysed:
(2R)-2,3-dihydroxy-3-methylbutanoate + NADP(+) = (2S)-2-hydroxy-2-methyl-3-oxobutanoate + NADPH
Biochemical function:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo tetramer (preferred)
Entry contents:
1 distinct polypeptide molecule
Ketol-acid reductoisomerase (NADP(+)) Chain: A
Molecule details ›
Chain: A
Length: 350 amino acids
Theoretical weight: 38.79 KDa
Source organism: Alicyclobacillus acidocaldarius subsp. acidocaldarius DSM 446
Expression system: Escherichia coli BL21(DE3)
  • Canonical: C8WR67 (Residues: 1-344; Coverage: 100%)
Gene names: Aaci_2227, ilvC
Sequence domains:
Structure domains:

Ligands and Environments

Cofactor: Ligand NDP 1 x NDP
2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL12-2
Spacegroup: P23
Unit cell:
a: 124.099Å b: 124.099Å c: 124.099Å
α: 90° β: 90° γ: 90°
R R work R free
0.156 0.154 0.182
Expression system: Escherichia coli BL21(DE3)