FEBS Lett. 2000 Aug 11;479(1-2):72-7.

Involvement of an FtsH homologue in the assembly of functional photosystem I in the cyanobacterium Synechocystis sp. PCC 6803.

Mann NH, Novac N, Mullineaux CW, Newman J, Bailey S, Robinson C.

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Department of Biological Sciences, University of Warwick, Coventry, UK. nm@dna.bio.warwick.ac.uk

Abstract

The Synechocystis sp. PCC 6803 genome encodes four putative homologues of the AAA protease FtsH, two of which (slr0228 and sll1463) have been subjected to insertional mutagenesis in this study. Disruption of sll1463 had no discernible effect but disruption of slr0228 caused a 60% reduction in the abundance of functional photosystem I, without affecting the cellular content of photosystem II or phycobilisomes. Fluorescence and immunoblotting analyses show reductions in PS I polypeptides and possible structural alterations in the residual PS I, indicating an important role for slr0228 in PS I biogenesis.

PMID:: 10940391; [PubMed - indexed for MEDLINE]

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