› 1a05

X-ray diffraction
2Å resolution

CRYSTAL STRUCTURE OF THE COMPLEX OF 3-ISOPROPYLMALATE DEHYDROGENASE FROM THIOBACILLUS FERROOXIDANS WITH 3-ISOPROPYLMALATE

Released:
DOI: 10.2210/pdb1a05/pdb
PDB entry 1a05 coloured by chain, front view.
PDB entry 1a05 coloured by chain, side view.
PDB entry 1a05 coloured by chain, top view.
Source organism: Acidithiobacillus ferrooxidans
Primary publication:
Structure of 3-isopropylmalate dehydrogenase in complex with 3-isopropylmalate at 2.0 A resolution: the role of Glu88 in the unique substrate-recognition mechanism.
Imada K, Inagaki K, Matsunami H, Kawaguchi H, Tanaka H, Tanaka N, Namba K
Structure 6 971-82 (1998)
PMID: 9739088

Function and Biology Details

Reaction catalysed: 
(1a) (2R,3S)-3-isopropylmalate + NAD(+) = (2S)-2-isopropyl-3-oxosuccinate + NADH
Biochemical function:
Biological process:
Cellular component:
Sequence domains:
Structure domain:

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-176344 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
3-isopropylmalate dehydrogenase Chains: A, B
Molecule details ›
Chains: A, B
Length: 358 amino acids
Theoretical weight: 38.51 KDa
Source organism: Acidithiobacillus ferrooxidans
Expression system: Escherichia coli
UniProt:
  • Canonical: Q56268 (Residues: 1-358; Coverage: 100%)
Gene name: leuB
Sequence domains: Isocitrate/isopropylmalate dehydrogenase
Structure domains: Isopropylmalate Dehydrogenase

Ligands and Environments

2 bound ligands:
Ligand MG 2 x MG
Ligand IPM 2 x IPM
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU FR-C
Spacegroup: P21212
Unit cell:
a: 56.54Å b: 114.24Å c: 130.89Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.198 0.198 0.275
Expression system: Escherichia coli

Quick links

Citations

1 review citation

Bacterial Branched-Chain Amino Acid Biosynthesis: Structures, Mechanisms, and Drugability.
Amorim Franco et al. (2017)
29 other articles

12 mentions without citation

Pervasive cryptic epistasis in molecular evolution.
Lunzer et al. (2010)
11 more