Germacrene A alcohol dehydrogenase () is an enzyme with systematic name germacra-1(10),4,11(13)-trien-12-ol:NADP<sup>+</sup> oxidoreductase. This enzyme catalyses the following chemical reaction
germacra-1(10),4,11(13)-trien-12-ol + 2 NADP<sup>+</sup> + H<sub>2</sub>O germacra-1(10),4,11(13)-trien-12-oate + 2 NADPH + 3 H<sup>+</sup> (overall reaction)
(1a) germacra-1(10),4,11(13)-trien-12-ol + NADP<sup>+</sup> germacra-1(10),4,11(13)-trien-12-al + NADPH + H<sup>+</sup>
(1b) germacra-1(10),4,11(13)-trien-12-al + NADP<sup>+</sup> + H<sub>2</sub>O germacra-1(10),4,11(13)-trien-12-oate + NADPH + 2 H<sup>+</sup>
In Lactuca sativa this enzyme is a multifunctional enzyme with EC 1.14.13.123.
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