doi: 10.1007/s11120-004-7762-9.
Distinct roles of CpcG1 and CpcG2 in phycobilisome assembly in the cyanobacterium Synechocystis sp. PCC 6803
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- PMID: 16049785
- DOI: 10.1007/s11120-004-7762-9
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Distinct roles of CpcG1 and CpcG2 in phycobilisome assembly in the cyanobacterium Synechocystis sp. PCC 6803
Photosynth Res.
2005 Jun.
Abstract
Structural role of the second copy of the rod-core linker CpcG, which was found by genome analysis, was studied in Synechocystis sp. PCC 6803 by gene disruption and fractionation of phycobilisome (sub)complexes. Disruption of cpcG2 (sll1471) resulted in a marked decrease in phycocyanin content both in the background of wild-type and cpcG1 (slr2051)-disruptant. The unique phycocyanin rod-CpcG2 complex without the major allophycocyanin components was isolated from the cpcG1-disruptant. By fluorescence analysis, it was proposed that CpcG2 protein connects the rods with a minor allophycocyanin component, to support energy transfer to Photosystem I.
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