Structural and Mutational Analysis of Band 7 Proteins in the Cyanobacterium Synechocystis sp. Strain PCC 6803

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Structural and mutational analysis of band 7 proteins in the cyanobacterium Synechocystis sp. strain PCC 6803.

Band 7 proteins, which encompass members of the stomatin, prohibitin, flotillin, and HflK/C protein families, are integral membrane proteins that play important physiological roles in eukaryotes but are poorly characterized in bacteria. We have studied the band 7 proteins encoded by the cyanobacterium Synechocystis sp. strain PCC 6803, with emphasis on their structure and proposed role in the a...

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Motile cyanobacterium Synechocystis sp. PCC 6803 cells show photomovement with respect to the light stimulus. Under lateral irradiation, Synechocystis displays a phototactic gliding movement toward the light source by a twodimensional random biased walk. Under vertical irradiation, Synechocystis decreased the frequency of mean vectorial gliding speed dependent on the applied fluence rate, where...

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Mutational analysis of the PsbL protein of photosystem II in the cyanobacterium Synechocystis sp. PCC 6803.

The psbL gene is a member of the psbEFLJ gene cluster in the cyanobacterium Synechocystis sp. PCC 6803 and higher plants. psbL, a 4.5 kDa protein encoded by this gene, is a component of the photosystem II complex. The amino acid sequence of this protein indicates that it has a single membrane-spanning alpha-helical domain. We have used a targeted mutagenesis technique to delete the coding regio...

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Thioredoxin peroxidase in the Cyanobacterium Synechocystis sp. PCC 6803.

The amino acid sequence deduced from the open reading frame designated sll0755 in Synechocystis sp. PCC 6803 is similar to the amino acid sequences of thioredoxin peroxidases from other organisms. In the present study, we found that a recombinant SLL0755 protein that was expressed in Escherichia coli was able to reduce H2O2 and tertiary butyl hydroperoxide with thioredoxin from E. coli as the e...

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Global analysis of circadian expression in the cyanobacterium Synechocystis sp. strain PCC 6803.

Cyanobacteria are the only bacterial species found to have a circadian clock. We used DNA microarrays to examine circadian expression patterns in the cyanobacterium Synechocystis sp. strain PCC 6803. Our analysis identified 54 (2%) and 237 (9%) genes that exhibited circadian rhythms under stringent and relaxed filtering conditions, respectively. The expression of most cycling genes peaked aroun...

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ژورنال

عنوان ژورنال: Journal of Bacteriology

سال: 2009

ISSN: 0021-9193,1098-5530

DOI: 10.1128/jb.00644-09