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In this and other ATP synthase mutants, we show that short-term exposure to moderate light intensities\u2014a few minutes\u2014induces an inhibition of electron transfer after the primary quinone acceptor of photosystem II (PSII), whereas longer exposure\u2014several hours\u2014leads to a progressive loss of PSII cores. An extensive swelling of thylakoids accompanies the initial inhibition of electron flow. Thylakoids deflate as PSII cores are lost. The slow process of PSII degradation involves the participation of ClpP, a chloroplast-encoded peptidase that is part of a major stromal protease Clp. In the light of the above findings, we discuss the photosensitivity of ATP synthase mutants with respect to the regular photoinhibition process that affects photosynthetic competent strains at much higher light intensities.<\/jats:p>","DOI":"10.1104\/pp.126.1.421","type":"journal-article","created":{"date-parts":[[2002,7,27]],"date-time":"2002-07-27T04:59:39Z","timestamp":1027745979000},"page":"421-433","source":"Crossref","is-referenced-by-count":73,"title":["The Light Sensitivity of ATP Synthase Mutants of<i>Chlamydomonas reinhardtii<\/i>\u00a0"],"prefix":"10.1093","volume":"126","author":[{"given":"Wojciech","family":"Majeran","sequence":"first","affiliation":[{"name":"Unite\u0301 Propre de Recherche-Centre National de la Recherche Scientifique 1261, Institut de Biologie Physico-Chimique, 13 rue Pierre et Marie Curie, 75005 Paris, France (W.M., D.D., O.V., F.-A.W.); and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jacqueline","family":"Olive","sequence":"additional","affiliation":[{"name":"Institut Jacques Monod, 2 Place Jussieu, 75251 Paris cedex 05, France (J.O.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dominique","family":"Drapier","sequence":"additional","affiliation":[{"name":"Unite\u0301 Propre de Recherche-Centre National de la Recherche Scientifique 1261, Institut de Biologie Physico-Chimique, 13 rue Pierre et Marie Curie, 75005 Paris, France (W.M., D.D., O.V., F.-A.W.); and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olivier","family":"Vallon","sequence":"additional","affiliation":[{"name":"Unite\u0301 Propre de Recherche-Centre National de la Recherche Scientifique 1261, Institut de Biologie Physico-Chimique, 13 rue Pierre et Marie Curie, 75005 Paris, France (W.M., D.D., O.V., F.-A.W.); 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