Osmotic shrinkage of cells of Synechocystis sp. PCC 6803 by water efflux via aquaporins regulates osmostress-inducible gene expression | Zendy

Alexey Shapiguzov | Zendy; Alexander A. Lyukevich | Zendy; Suleyman I. Allakhverdiev | Zendy; Tatiana V Sergeyenko | Zendy; Iwane Suzuki | Zendy; Norio Murata | Zendy; Dmitry A. Los | Zendy

Open Access

Osmotic shrinkage of cells of Synechocystis sp. PCC 6803 by water efflux via aquaporins regulates osmostress-inducible gene expression

Author(s) -

Alexey Shapiguzov,

Alexander A. Lyukevich,

Suleyman I. Allakhverdiev,

Tatiana V Sergeyenko,

Iwane Suzuki,

Norio Murata,

Dmitry A. Los

Publication year - 2005

Publication title -

microbiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.019

H-Index - 179

eISSN - 1465-2080

pISSN - 1350-0872

DOI - 10.1099/mic.0.27530-0

Subject(s) - aquaporin , efflux , osmotic concentration , synechocystis , osmotic shock , lipid bilayer , osmosis , microbiology and biotechnology , gene expression , chemistry , shrinkage , biology , gene , biochemistry , membrane , mutant , materials science , composite material

Osmotic stress causes water molecules to efflux from cells through the cytoplasmic membrane. This study reveals that targeted mutation of the aqpZ gene, encoding an aquaporin water channel protein, in the cyanobacterium Synechocystis sp. PCC 6803 prevents the osmotic shrinkage of cells, suggesting that it is the water channel rather than the lipid bilayer that is primarily responsible for water transition through the membrane of this organism. The observations suggest that the aquaporin-mediated shrinkage of the Synechocystis cells plays an important role in changes of gene expression in response to hyperosmotic stress.

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