CATH Classification

Domain Context

CATH Clusters

Superfamily N-(1-d-carboxylethyl)-l-norvaline Dehydrogenase; domain 2
Functional Family Ketol-acid reductoisomerase

Enzyme Information

1.1.1.86
Ketol-acid reductoisomerase (NADP(+)).
based on mapping to UniProt Q01292
(1) (2R)-2,3-dihydroxy-3-methylbutanoate + NADP(+) = (2S)-2-hydroxy-2- methyl-3-oxobutanoate + NADPH. (2) (2R,3R)-2,3-dihydroxy-3-methylpentanoate + NADP(+) = (S)-2-hydroxy-2- ethyl-3-oxobutanoate + NADPH.
-!- The enzyme, found in many bacteria and archaea, is specific for NADPH (cf. EC 1.1.1.382 and EC 1.1.1.383). -!- Formerly EC 1.1.1.89.

UniProtKB Entries (1)

Q01292
ILV5_SPIOL
Spinacia oleracea
Ketol-acid reductoisomerase, chloroplastic

PDB Structure

PDB 1QMG
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Structure of Spinach Acetohydroxyacid Isomeroreductase Complexed with its Product of Reaction Dihydroxy-Methylvalerate, Manganese and Adp-Ribose
Thomazeau, K., Dumas, R., Halgand, F., Forest, E., Douce, R., Biou, V.
Acta Crystallogr.,Sect.D