Beta-carotene to zeaxanthin conversion in the rapid turnover of the D1 protein of photosystem II

FEBS Letters
B DepkaA Trebst

Abstract

The carotenoid composition was investigated during enhanced D1 protein turnover in Chlamydomonas reinhardtii exposed to high light. After 2 h of high light there was no loss of the D1 protein yet. However, the beta-carotene content was significantly reduced. In parallel, an increase of the zeaxanthin content was found, which was higher than can be accounted for by the light-induced de-epoxidation of violaxanthin in the xanthophyll cycle reactions. We therefore assume that beta-carotene of photosystem II (PS II) is hydroxylated to zeaxanthin under high light stress. Inhibitors of carotene biosynthesis led to the loss of both PS II activity and D1 protein, indicating the requirement of beta-carotene synthesis for the reassembly of PS II in high light. Diuron blocked D1 protein as well as beta-carotene turnover. In the presence of chloramphenicol -- which allows just one turnover of the D1 protein -- 15% of the total beta-carotene was lost, calculated to be two beta-carotene.

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Citations

Oct 14, 2006·Planta·Nicoletta La RoccaWolfhart Rüdiger
Sep 10, 2008·Photosynthesis Research·Anja Krieger-LiszkayAchim Trebst
Jun 3, 2011·Plant & Cell Physiology·Kim Gabriele BeiselShizue Matsubara
Nov 13, 2002·Plant Physiology·Jan Bart RosselBarry J Pogson
Feb 16, 2016·Nanoscale Research Letters·Nataliya TaranAlexander Okanenko
Nov 1, 2011·Functional Plant Biology : FPB·Christopher I Cazzonelli
Aug 25, 2005·Doklady. Biochemistry and Biophysics·V S Saakov
Mar 28, 2003·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Karen BöhmeReimund Goss
Jun 22, 2021·Journal of Agricultural and Food Chemistry·Hengzhi WangJinxin Wang

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