- A-Z
- Endocytobiosis and ...
- Volume 23 (2012) - ...
- Biogenesis of thyla...
- Autor(in)
- Seitenbereich
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086-090
- Schlagwort(e)
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Synechocystis; photosystem II; assembly factors; PratA-defined membranes; biogenesis center; manganese binding
- Zusammenfsg.
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Oxygenic photosynthesis is responsible for production of earth’s atmospheric oxygen. Photosystem II (PSII) catalyzes the underlying oxidation of water and, thus, the initial reaction of the photosynthetic electron transfer chain. It consists of a number of different protein subunits as well as pigments and co-factors. For proper function, all these constituents have to be assembled in the correct spatiotemporal manner which is mediated by several assembly factors. One of these is represented by the cyanobacterial PratA protein which was shown to be involved in early steps of PSII biogenesis. More recent work provides evidence for a function of PratA in pre-loading of the PSII reaction center core protein D1 with Mn2+ in the periplasm. Furthermore, biochemical and electron-microscopical data revealed a PratA-dependent, specialized membrane structure located between plasma and thylakoid membranes in Synechocystis sp. PCC 6803 where the early steps of PSII biogenesis take place.