Journal
BIOCHIMICA ET BIOPHYSICA ACTA-PROTEIN STRUCTURE AND MOLECULAR ENZYMOLOGY
Volume 1482, Issue 1-2, Pages 84-91Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-4838(00)00141-2
Keywords
violaxanthin de-epoxidase; zeaxanthin epoxidase; plant; lipocalin; carotenoid; xanthophyll cycle
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Violaxanthin de-epoxidase and zeaxanthin epoxidase catalyze the interconversions between the carotenoids violaxanthin, antheraxanthin and zeaxanthin in plants. These interconversions form the violaxanthin or xanthophyll cycle that protects the photosynthetic system of plants against damage by excess light. These enzymes are the first reported lipocalin proteins identified from plants and are only the second examples of lipocalin proteins with enzymatic activity. This review summarizes the discovery and characterization of these two unique lipocalin enzymes and examines the possibility of other potential plant lipocalin proteins. (C) 2000 Elsevier Science B.V. All rights reserved.
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