PMID: 9537367Apr 16, 1998Paper

Mutation of a gene encoding a putative glycoprotease leads to reduced salt tolerance, altered pigmentation, and cyanophycin accumulation in the cyanobacterium Synechocystis sp. strain PCC 6803

Journal of Bacteriology
E ZutherM Hagemann

Abstract

The salt-sensitive mutant 549 of the cyanobacterium Synechocystis sp. strain PCC 6803 was genetically and physiologically characterized. The mutated site and corresponding wild-type site were cloned and partially sequenced. The genetic analysis revealed that during the mutation about 1.8 kb was deleted from the chromosome of mutant 549. This deletion affected four open reading frames: a gcp gene homolog, the psaFJ genes, and an unknown gene. After construction of mutants with single mutations, only the gcp mutant showed a reduction in salt tolerance comparable to that of the initial mutant, indicating that the deletion of this gene was responsible for the salt sensitivity and that the other genes were of minor importance. Besides the reduced salt tolerance, a remarkable change in pigmentation was observed that became more pronounced in salt-stressed cells. The phycobilipigment content decreased, and that of carotenoids increased. Investigations of changes in the ultrastructure revealed an increase in the amount of characteristic inclusion bodies containing the high-molecular-weight nitrogen storage polymer cyanophycin (polyaspartate and arginine). The salt-induced accumulation of cyanophycin was confirmed by chemical estimation...Continue Reading

References

Jul 28, 1995·Science·R D FleischmannJ M Merrick

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Citations

Sep 5, 2015·Molecular Microbiology·Patrick C ThiavilleValérie de Crécy-Lagard
Apr 20, 2005·FEMS Microbiology Letters·Li ZhengYinduo Ji
Jul 29, 2020·Trends in Microbiology·Valérie de Crécy-Lagard, Marshall Jaroch
Jan 24, 2006·Journal of Bacteriology·Nancy H KolodnyMary M Allen
Apr 21, 2009·Journal of Bacteriology·Jennifer I HandfordTracy Palmer

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