1rwt
Crystal Structure of Spinach Major Light-harvesting complex at 2.72 Angstrom ResolutionCrystal Structure of Spinach Major Light-harvesting complex at 2.72 Angstrom Resolution
Structural highlights
Function[CB2A_SPIOL] The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe major light-harvesting complex of photosystem II (LHC-II) serves as the principal solar energy collector in the photosynthesis of green plants and presumably also functions in photoprotection under high-light conditions. Here we report the first X-ray structure of LHC-II in icosahedral proteoliposome assembly at atomic detail. One asymmetric unit of a large R32 unit cell contains ten LHC-II monomers. The 14 chlorophylls (Chl) in each monomer can be unambiguously distinguished as eight Chla and six Chlb molecules. Assignment of the orientation of the transition dipole moment of each chlorophyll has been achieved. All Chlb are located around the interface between adjacent monomers, and together with Chla they are the basis for efficient light harvesting. Four carotenoid-binding sites per monomer have been observed. The xanthophyll-cycle carotenoid at the monomer-monomer interface may be involved in the non-radiative dissipation of excessive energy, one of the photoprotective strategies that have evolved in plants. Crystal structure of spinach major light-harvesting complex at 2.72 A resolution.,Liu Z, Yan H, Wang K, Kuang T, Zhang J, Gui L, An X, Chang W Nature. 2004 Mar 18;428(6980):287-92. PMID:15029188[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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