Term Name: ketol-acid reductoisomerase activity
Synonyms: (R)-2,3-dihydroxy-3-methylbutanoate:NADP+ oxidoreductase (isomerizing), 2-hydroxy-3-keto acid reductoisomerase activity, acetohydroxy acid isomeroreductase activity, acetohydroxy acid reductoisomerase activity, acetolactate reductoisomerase activity, alpha-keto-beta-hydroxylacyl reductoisomerase activity, dihydroxyisovalerate (isomerizing) dehydrogenase activity, dihydroxyisovalerate dehydrogenase (isomerizing) activity, isomeroreductase activity, ketol acid reductoisomerase activity, reductoisomerase activity
Definition: Catalysis of the reaction: (R)-2,3-dihydroxy-3-methylbutanoate + NADP+ = (S)-2-hydroxy-2-methyl-3-oxobutanoate + NADPH + H+.
Ontology: GO: Molecular Function [GO:0004455]    QuickGO    AmiGO

Relationships
is a type of: oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor
inverse has_part: L-valine biosynthetic process