Supramolecular organization of phycobiliproteins in the chlorophyll  d ‐containing cyanobacterium  Acaryochloris marina | Zendy

Chen Min | Zendy; Floetenmeyer Matthias | Zendy; Bibby Thomas S. | Zendy

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Supramolecular organization of phycobiliproteins in the chlorophyll d ‐containing cyanobacterium Acaryochloris marina

Author(s) -

Chen Min,

Floetenmeyer Matthias,

Bibby Thomas S.

Publication year - 2009

Publication title -

febs letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.593

H-Index - 257

eISSN - 1873-3468

pISSN - 0014-5793

DOI - 10.1016/j.febslet.2009.07.012

Subject(s) - phycobiliprotein , photosystem i , chemistry , photosystem ii , photosystem , photosynthesis , phycobilisome , light harvesting complexes of green plants , biophysics , biology , cyanobacteria , biochemistry , genetics , bacteria

Here we report the high‐resolution detail of the organization of phycobiliprotein structures associated with photosynthetic membranes of the chlorophyll d ‐containing cyanobacterium Acaryochloris marina . Cryo‐electron transmission‐microscopy on native cell sections show extensive patches of near‐crystalline phycobiliprotein rods that are associated with the stromal side of photosynthetic membranes. This supramolecular photosynthetic structure represents a novel mechanism of organizing the photosynthetic light‐harvesting machinery. In addition, the specific location of phycobiliprotein patches suggests a physical separation of photosystem I and photosystem II reaction centres. Based on this finding and the known photosystem's structure in Acaryochloris , we discuss possible membrane arrangements of photosynthetic membrane complexes in this species.

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