Structure of cyanobacterial photosystem I.
Photosystem I is one of the most fascinating membrane protein complexes for which a structure has been determined. It functions as a bio-solar energy converter, catalyzing one of the first steps of oxygenic photosynthesis. It captures the light of the sun by means of a large antenna system, consisting of chlorophylls and carotenoids, and transfers the energy to the center of the complex, driving the transmembrane electron transfer from plastoquinone to ferredoxin. Cyanobacterial Photosystem I is a trimer consisting of 36 proteins to which 381 cofactors are non-covalently attached. This review discusses the complex function of Photosystem I based on the structure of the complex at 2.5 A resolution as well as spectroscopic and biochemical data.
Arizona State University, Tempe, AZ, 85287-1604, USA.
Ingo
I
Grotjohann
Petra
P
Fromme
D001426:Bacterial Proteins / Q000737:chemistry* / Q000378:metabolism*; D000458:Cyanobacteria / Q000737:chemistry*; D004579:Electron Transport; D045331:Photosystem I Protein Complex / Q000737:chemistry* / Q000378:metabolism*; D011487:Protein Conformation; D021122:Protein Subunits
D001426:Bacterial Proteins; D045331:Photosystem I Protein Complex; D021122:Protein Subunits