Xanthoxin dehydrogenase explained

Xanthoxin dehydrogenase
Ec Number:	1.1.1.288

In enzymology, a xanthoxin dehydrogenase is an enzyme that catalyzes the chemical reaction

xanthoxin + NAD⁺

\rightleftharpoons abscisic aldehyde + NADH + H⁺

Thus, the two substrates of this enzyme are xanthoxin and NAD⁺, whereas its 3 products are abscisic aldehyde, NADH, and H⁺.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD⁺ or NADP⁺ as acceptor. The systematic name of this enzyme class is xanthoxin:NAD⁺ oxidoreductase. Other names in common use include xanthoxin oxidase, and ABA2. This enzyme participates in carotenoid biosynthesis.

References

• Sindhu RK . Walton DC . 1988 . Xanthoxin metabolism in cell-free preparations from wild type and wilty mutants of tomato . Plant Physiol. . 88 . 178 - 182 . 10.1104/pp.88.1.178 . 16666262 . 1 . 1055545.
• Schwartz SH, Leon-Kloosterziel KM, Koornneef M, Zeevaart JA . 1997 . Biochemical characterization of the aba2 and aba3 mutants in Arabidopsis thaliana . Plant Physiol. . 114 . 161 - 6 . 9159947 . 10.1104/pp.114.1.161 . 1 . 158290 .
• Ponce MR, Micol JL, Serrano R, Rodriguez PL . 2002 . The short-chain alcohol dehydrogenase ABA2 catalyzes the conversion of xanthoxin to abscisic aldehyde . Plant Cell . 14 . 1833 - 46 . 12172025 . 10.1105/tpc.002477 . 8 . 151468 .