Structure and light-regulated expression of phycoerythrin genes in wild-type and phycobilisome assembly mutants of Synechocystis sp. strain PCC 6701

Journal of Bacteriology
L K Anderson, A R Grossman

Abstract

Phycoerythrin is a major pigmented component of the phycobilisome, a cyanobacterial light-harvesting complex. It contains bilin-type chromophores that absorb and transfer light energy to chlorophyll protein complexes of the photosynthetic membranes. In many cyanobacteria, phycoerythrin expression is regulated by light wavelength in a response known as chromatic adaptation. Green light-grown cells contain higher levels of this biliprotein than do cells grown in red light. The phycoerythrin gene set from the unicellular cyanobacterium Synechocystis sp. strain PCC 6701 was cloned and sequenced, and the 5' end of the phycoerythrin mRNA was localized. The amino acid sequences of the phycoerythrin subunits from Synechocystis strain 6701 and Fremyella diplosiphon were 90% identical. As observed in F. diplosiphon, the Synechocystis strain 6701 phycoerythrin transcript accumulated to high levels in green light-grown cells and low levels in red light-grown cells. Similar nucleotide sequences, which might control gene expression, occurred upstream of the transcription initiation sites of the phycoerythrin genes in both organisms. While the phycoerythrin structure and light-regulated transcript accumulation were similar in Synechocystis st...Continue Reading

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Citations

Nov 21, 1998·Molecular Microbiology·L K Anderson, C M Toole
Nov 1, 1995·Photosynthesis Research·A N Glazer, G J Wedemayer
Apr 14, 2016·Photosynthesis Research·Vinay KumarDatta Madamwar
Jan 16, 1999·The Journal of Biological Chemistry·J C Thomas, C Passaquet
Mar 1, 1990·Journal of Bacteriology·L K Anderson, A R Grossman
Sep 1, 1993·Microbiological Reviews·A R GrossmanJ L Collier

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