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Role of a novel photosystem II-associated carbonic anhydrase in photosynthetic carbon assimilation in Chlamydomonas reinhardtii
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).ORCID iD: 0000-0002-6002-929X
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1999 (English)In: FEBS Letters, ISSN 0014-5793, E-ISSN 1873-3468, Vol. 444, no 1, 102-105 p.Article in journal (Refereed) Published
Abstract [en]

Intracellular carbonic anhydrases (CA) in aquatic photosynthetic organisms are involved in the CO2-concentrating mechanism (CCM), which helps to overcome CO2 limitation in the environment. In the green alga Chlamydomonas reinhardtii, this CCM is initiated and maintained by the pH gradient created across the chloroplast thylakoid membranes by photosystem (PS) II-mediated electron transport. We show here that photosynthesis is stimulated by a novel, intracellular alpha-CA bound to the chloroplast thylakoids. It is associated with PSII on the lumenal side of the thylakoid membranes. We demonstrate that PSII in association with this lumenal CA operates to provide an ample flux of CO2 for carboxylation. (C) 1999 Federation of European Biochemical Societies.

Place, publisher, year, edition, pages
1999. Vol. 444, no 1, 102-105 p.
Keyword [en]
carbonic anhydrase, photosystem II, Chlamydomonas reinhardtii, carbon concentration mechanism
Identifiers
URN: urn:nbn:se:umu:diva-44628ISI: 000078616200020OAI: oai:DiVA.org:umu-44628DiVA: diva2:434816
Available from: 2011-08-16 Created: 2011-06-09 Last updated: 2017-12-08

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Karlsson, JanOquist, GunnarSamuelsson, Göran

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