The structure of plant photosystem i super-complex at 2.8 Å resolution

Yuval Mazor; Anna Borovikova; Nathan Nelson

doi:10.7554/eLife.07433

The structure of plant photosystem i super-complex at 2.8 Å resolution

Yuval Mazor, Anna Borovikova, Nathan Nelson

CLAS-NS: Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article

104 Scopus citations

Abstract

Most life forms on Earth are supported by solar energy harnessed by oxygenic photosynthesis. In eukaryotes, photosynthesis is achieved by large membrane-embedded supercomplexes, containing reaction centers and connected antennae. Here, we report the structure of the higher plant PSI-LHCI super-complex determined at 2.8 Å resolution. The structure includes 16 subunits and more than 200 prosthetic groups, which are mostly light harvesting pigments. The complete structures of the four LhcA subunits of LHCI include 52 chlorophyll a and 9 chlorophyll b molecules, as well as 10 carotenoids and 4 lipids. The structure of PSI-LHCI includes detailed protein pigments and pigment-pigment interactions, essential for the mechanism of excitation energy transfer and its modulation in one of nature’s most efficient photochemical machines.

Original language	English (US)
Article number	e07433
Journal	eLife
Volume	4
Issue number	JUNE2015
DOIs	https://doi.org/10.7554/eLife.07433
State	Published - Jun 15 2015

ASJC Scopus subject areas

Neuroscience(all)
Immunology and Microbiology(all)
Biochemistry, Genetics and Molecular Biology(all)

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Mazor, Y., Borovikova, A., & Nelson, N. (2015). The structure of plant photosystem i super-complex at 2.8 Å resolution. eLife, 4(JUNE2015), [e07433]. https://doi.org/10.7554/eLife.07433

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abstract = "Most life forms on Earth are supported by solar energy harnessed by oxygenic photosynthesis. In eukaryotes, photosynthesis is achieved by large membrane-embedded supercomplexes, containing reaction centers and connected antennae. Here, we report the structure of the higher plant PSI-LHCI super-complex determined at 2.8 {\AA} resolution. The structure includes 16 subunits and more than 200 prosthetic groups, which are mostly light harvesting pigments. The complete structures of the four LhcA subunits of LHCI include 52 chlorophyll a and 9 chlorophyll b molecules, as well as 10 carotenoids and 4 lipids. The structure of PSI-LHCI includes detailed protein pigments and pigment-pigment interactions, essential for the mechanism of excitation energy transfer and its modulation in one of nature{\textquoteright}s most efficient photochemical machines.",

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