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), 1306-1310. (doi:10.1016/j.febslet.2005.01.023).
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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%.
|Keywords:||Photosynthesis; Photosystem II; Electron microscopy; PBB proteins; Acaryochloris marina|
|Subjects:||Q Science > QR Microbiology|
|Divisions:||University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES)
|Date Deposited:||23 May 2006|
|Last Modified:||01 Jun 2011 11:35|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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