The Role of Plant CCTα in Salt- and Osmotic-Stress Tolerance | Zendy

Akiyo Yamada | Zendy; Mikiko Sekiguchi | Zendy; Tetsuro Mimura | Zendy; Yoshihiro Ozeki | Zendy

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The Role of Plant CCTα in Salt- and Osmotic-Stress Tolerance

Author(s) -

Akiyo Yamada,

Mikiko Sekiguchi,

Tetsuro Mimura,

Yoshihiro Ozeki

Publication year - 2002

Publication title -

plant and cell physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.975

H-Index - 152

eISSN - 1471-9053

pISSN - 0032-0781

DOI - 10.1093/pcp/pcf120

Subject(s) - escherichia coli , biology , biochemistry , osmoprotectant , osmotic shock , gene , microbiology and biotechnology , chemistry , amino acid , proline

To find key genes essential for salt tolerance in the mangrove plant, Bruguiera sexangula, functional screening was performed using Escherichia coli as the host organism. A transformant expressing a cytosolic chaperonin-containing TCP-1alpha (CCTalpha) homologue displayed enhanced salt tolerance. Analysis in E. coli of the functional region revealed that a sequence of only 218 amino acids, containing the apical domain, is necessary for osmotolerance. Furthermore, this domain shows chaperone activity in vitro. Therefore, CCTalpha facilitates the folding of proteins without ATP or the cage-like structure, and may play an important role in stress tolerance, at least in B. sexangula.

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