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PMID:15710430
| Citation |
Chen, M, Bibby, TS, Nield, J, Larkum, AW and Barber, J (2005) Structure of a large photosystem II supercomplex from Acaryochloris marina. FEBS Lett. 579:1306-10 |
|---|---|
| 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%. |
| Links |
PubMed Online version:10.1016/j.febslet.2005.01.023 |
| Keywords |
Cyanobacteria/chemistry; Cyanobacteria/ultrastructure; Microscopy, Electron; Photosystem II Protein Complex/chemistry; Photosystem II Protein Complex/ultrastructure; Spectrum Analysis; Thylakoids/chemistry |
| edit table |
Significance
Annotations
| Gene product | Qualifier | GO Term | Evidence Code | with/from | Aspect | Extension | Notes | Status |
|---|---|---|---|---|---|---|---|---|
|
part_of |
GO:0042651: thylakoid membrane |
ECO:0000314: direct assay evidence used in manual assertion |
C |
Seeded From UniProt |
complete | |||
| GO:0042651: thylakoid membrane |
ECO:0000314: |
C |
The proteins comprising the thylakoid membrane were separated out and tagged with photosystem-specific antibodies on the gel shown in figure 1. The F5 fraction was analyzed by mass spectroscopy and was shown to contain pcaA and pcbC gene products. |
complete | ||||
See also
References
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