Functional Consequences of the Organization of the Photosynthetic Apparatus in Rhodobacter sphaeroides
نویسندگان
چکیده
منابع مشابه
Supramolecular organization of the photosynthetic apparatus of Rhodobacter sphaeroides.
Native tubular membranes were purified from the purple non-sulfur bacterium Rhodobacter sphaeroides. These tubular structures contain all the membrane components of the photosynthetic apparatus, in the relative ratio of one cytochrome bc1 complex to two reaction centers, and approximately 24 bacteriochlorophyll molecules per reaction center. Electron micrographs of negative-stained membranes di...
متن کاملThe photosynthetic apparatus of Rhodobacter sphaeroides.
Functional and ultrastructural studies have indicated that the components of the photosynthetic apparatus of Rhodobacter sphaeroides are highly organized. This organization favors rapid electron transfer that is unimpeded by reactant diffusion. The light-harvesting complexes only partially surround the photochemical reaction center, which ensures an efficient shuttling of quinones between the p...
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In the bacterium R. sphaeroides, the polypeptide PufX is indispensable for photosynthetic growth. Its deletion is known to have important consequences on the organization of the photosynthetic apparatus. In the wild-type strain, complexes between the reaction center (RC) and the antenna (light-harvesting complex 1 (LH1)) are associated in dimers, and LH1 does not fully encircle the RC. In the a...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 2005
ISSN: 0021-9258
DOI: 10.1074/jbc.m412088200