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The rapidly phosphorylated 25 kDa polypeptide of the light-harvesting complex of Photosystem II is encoded by the Type 2 cab-II genes






Biochimica et biophysica acta: International journal of biochemistry and biophysics, 1019(2): 110-114

The rapidly phosphorylated 25 kDa polypeptide of the light-harvesting complex of Photosystem II is encoded by the Type 2 cab-II genes

The main light-harvesting complex of Photosystem II (LHC II) in higher plants consists of two sub-populations. The 'inner' pool consists only of a 27 kDa polypeptide, whereas in the 'outer' pool both the 27 kDa and a 25 kDa polypeptide are found. We purified the 25 and the 27 kDa LHC II polypeptides from Scots pine and 25 kDa LHC II polypeptide from spinach. Protein sequencing after cleavage with endoproteinase Lys-C showed that the 25 kDa polypeptide is encoded by the Type 2 cab-II genes and the 27 kDa polypeptide by the Type I cab-II genes. A fatty acid was not covalently attached to the peptides assembled into the pigment-protein complex. Our results show that the different polypeptides seen on a gel are different gene products, and not the result of different processing.

Accession: 001982686

PMID: 2207110

DOI: 10.1016/0005-2728(90)90130-v

Download PDF Full Text: The rapidly phosphorylated 25 kDa polypeptide of the light-harvesting complex of Photosystem II is encoded by the Type 2 cab-II genes



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