Journal
CURRENT OPINION IN STRUCTURAL BIOLOGY
Volume 39, Issue -, Pages 46-53Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.sbi.2016.04.004
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Funding
- program for promoting the enhancement of research universities at Okayama University
- JSPS KAKENHI Grant from MEXT, Japan [24000018, 26840023, 15H01642]
- National Basic Research Program of China [2011CBA00901, 2015CB150101]
- Youth Innovation Promotion Association of CAS, China
- Grants-in-Aid for Scientific Research [26840023, 24000018, 15H01642] Funding Source: KAKEN
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Photosystem I (PSI) is one of the two photosystems in oxygenic photosynthesis, and absorbs light energy to generate reducing power for the reduction of NADP+ to NADPH with a quantum efficiency close to 100%. The plant PSI core forms a supercomplex with light-harvesting complex I (LHCI) with a total molecular weight of over 600 kDa. Recent X-ray structure analysis of the PSI-LHCI membrane-protein supercomplex has revealed detailed arrangement of the light-harvesting pigments and other cofactors especially within LHCI. Here we introduce the overall structure of the PSI-LHCI supercomplex, and then focus on the excited energy transfer (EET) pathways from LHCI to the PSI core and photoprotection mechanisms based on the structure obtained.
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