منابع مشابه
Mass spectroscopy locates the extrinsic proteins of photosystem II.
The photosynthetic oxidation of water is catalyzed by photosystem II (PSII), a multisubunit pigment-protein embedded in the thylakoid membranes of cyanobacteria, algae, and plants. This remarkable photoenzyme is capable of generating the highly oxidizing chemical species required to extract four tightly bound electrons of two substrate water-molecules, yielding biosynthetically useful reductant...
متن کاملStructural Coupling of Extrinsic Proteins with the Oxygen-Evolving Center in Photosystem II
Photosystem II (PSII), which catalyzes photosynthetic water oxidation, is composed of more than 20 subunits, including membrane-intrinsic and -extrinsic proteins. The PSII extrinsic proteins shield the catalytic Mn4CaO5 cluster from the outside bulk solution and enhance binding of inorganic cofactors, such as Ca(2+) and Cl(-), in the oxygen-evolving center (OEC) of PSII. Among PSII extrinsic pr...
متن کاملExtrinsic photosystem II carbonic anhydrase in maize mesophyll chloroplasts.
One form of carbonic anhydrase (CA) has been observed in maize (Zea mays) thylakoids and photosystem II (PSII)-enriched membranes. Here, we show that an antibody produced against a thylakoid lumen-targeted CA found in Chlamydomonas reinhardtii reacts with a single 33-kD polypeptide in maize thylakoids. With immunoblot analysis, we found that this single polypeptide could be identified only in m...
متن کاملEnvironmental pH and the Requirement for the Extrinsic Proteins of Photosystem II in the Function of Cyanobacterial Photosynthesis
In one of the final stages of cyanobacterial Photosystem II (PS II) assembly, binding of up to four extrinsic proteins to PS II stabilizes the oxygen-evolving complex (OEC). Growth of cyanobacterial mutants deficient in certain combinations of these thylakoid-lumen-associated polypeptides is sensitive to changes in environmental pH, despite the physical separation of the membrane-embedded PS II...
متن کاملLocalization of the small CAB-like proteins in photosystem II.
The cyanobacterial small CAB-like proteins (SCPs) consist of one-helix proteins that resemble transmembrane regions of the light-harvesting proteins of plants. To determine whether these proteins are associated with protein complexes in the thylakoid membrane, an abundant member of the SCP family, ScpD, was marked with a His tag, and proteins co-isolating with His-tagged ScpD were identified. T...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Bioenergetics
سال: 2012
ISSN: 0005-2728
DOI: 10.1016/j.bbabio.2011.07.006