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Structure of a large photosystem II supercomplex from Acaryochloris marina

Chen, M., Bibby, T.S., Nield, J., Larkum, A.W. and Barber, J. (2005) Structure of a large photosystem II supercomplex from Acaryochloris marina FEBS Letters, 579, (5), pp. 1306-1310. (doi:10.1016/j.febslet.2005.01.023).

Record type: Article

Abstract

Acaryochloris marina is a prochlorophyte-like cyanobacterium containing both phycobilins and chlorophyll d as light harvesting pigments. We show that the chlorophyll d light harvesting system, composed of Pcb proteins, functionally associates with the photosystem II (PSII) reaction center (RC) core to form a giant supercomplex. This supercomplex has a molecular mass of about 2300 kDa and dimensions of 385 A x 240 A. It is composed of two PSII-RC core dimers arranged end-to-end, flanked by eight symmetrically related Pcb proteins on each side. Thus each PSII-RC monomer has four Pcb subunits acting as a light harvesting system which increases the absorption cross section of the PSII-RC core by almost 200%.

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Published date: 14 February 2005
Keywords: Photosynthesis, Photosystem II, Electron microscopy, PBB proteins, Acaryochloris marina

Identifiers

Local EPrints ID: 37558
URI: http://eprints.soton.ac.uk/id/eprint/37558
ISSN: 0014-5793
PURE UUID: d4bd9323-f825-40db-b528-794827ae55b0

Catalogue record

Date deposited: 23 May 2006
Last modified: 17 Jul 2017 15:42

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Contributors

Author: M. Chen
Author: T.S. Bibby
Author: J. Nield
Author: A.W. Larkum
Author: J. Barber

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