Characterization of the Nuclear- and Plastid-EncodedsecA-Homologous Genes in the Unicellular Red AlgaCyanidioschyzon merolae | Zendy

Yosuke Koyama | Zendy; Koji Takimoto | Zendy; Asuka Kojima | Zendy; Kei Asai | Zendy; Satoshi Matsuoka | Zendy; Toshiaki Mitsui | Zendy; Kouji Matsumoto | Zendy; Hiroshi Hara | Zendy; Niji Ohta | Zendy

Open Access

Characterization of the Nuclear- and Plastid-EncodedsecA-Homologous Genes in the Unicellular Red AlgaCyanidioschyzon merolae

Author(s) -

Yosuke Koyama,

Koji Takimoto,

Asuka Kojima,

Kei Asai,

Satoshi Matsuoka,

Toshiaki Mitsui,

Kouji Matsumoto,

Hiroshi Hara,

Niji Ohta

Publication year - 2011

Publication title -

bioscience biotechnology and biochemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.509

H-Index - 116

eISSN - 1347-6947

pISSN - 0916-8451

DOI - 10.1271/bbb.110338

Subject(s) - plastid , biology , gene , chromosomal translocation , genome , nuclear gene , homologous chromosome , atpase , genetics , chloroplast , microbiology and biotechnology , biochemistry , enzyme

SecA is an ATP-driven motor for protein translocation in bacteria and plants. Mycobacteria and listeria were recently found to possess two functionally distinct secA genes. In this study, we found that Cyanidioschyzon merolae, a unicellular red alga, possessed two distinct secA-homologous genes; one encoded in the cell nucleus and the other in the plastid genome. We found that the plastid-encoded SecA homolog showed significant ATPase activity at low temperature, and that the ATPase activity of the nuclear-encoded SecA homolog showed significant activity at high temperature. We propose that the two SecA homologs play different roles in protein translocation.

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