ID 1.1.1.383 DE ketol-acid reductoisomerase [NAD(P)(+)]. CA (1) (2R)-2,3-dihydroxy-3-methylbutanoate + NAD(+) = (2S)-2-acetolactate + CA H(+) + NADH. CA (2) (2R)-2,3-dihydroxy-3-methylbutanoate + NADP(+) = (2S)-2-acetolactate CA + H(+) + NADPH. CC -!- The enzyme, characterized from the bacteria Hydrogenobaculum sp. and CC Syntrophomonas wolfei subsp. wolfei and from the archaea CC Metallosphaera sedula and Ignisphaera aggregans, can use both NADH CC and NADPH with similar efficiency (cf. EC 1.1.1.86 and EC 1.1.1.382). DR O28294, ILVC_ARCFU ; B4U6I9, ILVC_HYDS0 ; E0SRA9, ILVC_IGNAA ; DR A4YI15, ILVC_METS5 ; Q0AV19, ILVC_SYNWW ; //