Roles of Chloroplast RNA Polymerase Sigma Factors in Chloroplast Development and Stress Response in Higher Plants
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概要
- 論文の詳細を見る
Chloroplast transcription in higher plants is performed by two types of RNA polymerases, plastid-encoded RNA polymerase (PEP) and nuclear-encoded RNA polymerase (NEP). PEP is a eubacteria-type multisubunit enzyme whose catalytic core subunits are encoded by the chloroplast genome, whereas NEP is the nuclear encoded T7 phage-type single subunit enzyme. PEP is critical for the biogenesis and maintenance of chloroplasts, and is finely tuned by the nuclear encoded sigma subunits. Of the six Arabidopsis sigma subunits, SIG2 is involved in the transcription of several chloroplast tRNA genes, including trnE encoding tRNA-Glu. SIG2 possibly couples translation and pigment synthesis in chloroplasts. On the other hand, SIG5 is induced by various stresses and contributes to repair of damaged photosystem II (PSII) through transcription of the psbD and psbC genes. Thus target genes and the physiological role of each sigma subunit are becoming clearer.
- 社団法人 日本農芸化学会の論文
- 2004-11-23
著者
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Tanaka Kan
Institute of Molecular and Cellular Biosciences, The University of Tokyo
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Kanamaru Kengo
Laboratory of Molecular Genetics, Institute of Molecular and Cellular Biosciences, The University of
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Tanaka Kan
Institute Of Molecular And Cellular Biosciences The University Of Tokyo
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Tanaka Kan
Institute Of Applied Microbiology The University Of Tokyo
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Kanamaru Kengo
Laboratory Of Biochemistry Faculty Of Agriculture Kobe University
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