Specific Oxidative Cleavage of Carotenoids by VP14 of Maize-Reference-Cited by-同舟云学术

Specific Oxidative Cleavage of Carotenoids by VP14 of Maize

Published:1997-06-20 Issue:5320 Volume:276 Page:1872-1874
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Schwartz Steven H.¹²³,Tan Bao Cai¹²³,Gage Douglas A.¹²³,Zeevaart Jan A. D.¹²³,McCarty Donald R.¹²³

Affiliation:

1. S. H. Schwartz and J. A. D. Zeevaart, Michigan State University–Department of Energy (MSU-DOE) Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA.

2. B. C. Tan and D. R. McCarty, Graduate Program in Plant Molecular and Cellular Biology, Horticultural Sciences, 1143 Fifield Hall, University of Florida, Gainesville, FL 32611, USA.

3. D. A. Gage, Department of Biochemistry, MSU, East Lansing, MI 48824, USA.

Abstract

The plant growth regulator abscisic acid (ABA) is formed by the oxidative cleavage of an epoxy-carotenoid. The synthesis of other apocarotenoids, such as vitamin A in animals, may occur by a similar mechanism. In ABA biosynthesis, oxidative cleavage is the first committed reaction and is believed to be the key regulatory step. A new ABA-deficient mutant of maize has been identified and the corresponding gene, Vp14 , has been cloned. The recombinant VP14 protein catalyzes the cleavage of 9- cis -epoxy-carotenoids to form C 25 apo-aldehydes and xanthoxin, a precursor of ABA in higher plants.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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