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Information on EC 1.1.1.86 - ketol-acid reductoisomerase (NADP+)

for references in articles please use BRENDA:EC1.1.1.86

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IUBMB Comments

Also catalyses the reduction of 2-ethyl-2-hydroxy-3-oxobutanoate to 2,3-dihydroxy-3-methylpentanoate. The enzyme, found in many bacteria and archaea, is specific for NADPH (cf. EC 1.1.1.382, ketol-acid reductoisomerase (NAD+) and EC 1.1.1.383, ketol-acid reductoisomerase [NAD(P)+]).

The enzyme appears in viruses and cellular organisms

Synonyms
reductoisomerase, ketol-acid reductoisomerase, acetohydroxy acid isomeroreductase, ilv5p, isomeroreductase, acetohydroxyacid isomeroreductase, ahair, acetohydroxy acid reductoisomerase, ilvc1, acetolactate reductoisomerase, more

REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
(2R)-2,3-dihydroxy-3-methylbutanoate + NADP+ = (2S)-2-hydroxy-2-methyl-3-oxobutanoate + NADPH + H+
show the reaction diagram
PATHWAY SOURCE
PATHWAYS
MetaCyc
L-isoleucine biosynthesis I (from threonine), L-isoleucine biosynthesis III, L-valine biosynthesis, pyruvate fermentation to isobutanol (engineered)