Arabidopsis CHL27, located in both envelope and thylakoid membranes, is required for the synthesis of protochlorophyllide

Proceedings of the National Academy of Sciences of the United States of America - Tập 100 Số 26 - Trang 16119-16124 - 2003
Stephen Tottey1, Maryse A. Block1, Michael Allen1, Tomas Westergren1, Catherine Albrieux1, Henrik Vibe Scheller1, Sabeeha Merchant1, Poul Erik Jensen1
1Department of Chemistry and Biochemistry, University of California, Box 951569, Los Angeles, CA 90095; Physiologie Cellulaire Végétale, Unité Mixte de Recherche 5168 Centre National de la Recherche Scientifique/Commissariat à l'Energie Atomique/Université J. Fourier/Institut National de la Recherche Agronomique, Commissariat à l'Energie Atomique-Grenoble, Départment Réponse et Dynamique Cellulaires/Physiologie Cellulaire Végétale, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France; and Plant...

Tóm tắt

CHL27, the Arabidopsis homologue to Chlamydomonas Crd1, a plastid-localized putative diiron protein, is required for the synthesis of protochlorophyllide and therefore is a candidate subunit of the aerobic cyclase in chlorophyll biosynthesis. δ-Aminolevulinic acid-fed antisense Arabidopsis plants with reduced amounts of Crd1/CHL27 accumulate Mg-protoporphyrin IX monomethyl ester, the substrate of the cyclase reaction. Mutant plants have chlorotic leaves with reduced abundance of all chlorophyll proteins. Fractionation of Arabidopsis chloroplast membranes shows that Crd1/CHL27 is equally distributed on a membrane-weight basis in the thylakoid and inner-envelope membranes.

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Proceedings of the National Academy of Sciences of the United States of America

Tập 100 Số 26

16119-16124

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