Regulatory System for Light-Responsive Gene Expression in Photosynthesizing Bacteria:Cis-Elements andTrans-Acting Factors in Transcription and Post-Transcription | Zendy

Munehiko Asayama | Zendy

Open Access

Regulatory System for Light-Responsive Gene Expression in Photosynthesizing Bacteria:Cis-Elements andTrans-Acting Factors in Transcription and Post-Transcription

Author(s) -

Munehiko Asayama

Publication year - 2006

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.70.565

Subject(s) - transcription (linguistics) , biology , gene , promoter , gene expression , rna polymerase , darkness , genetics , regulation of gene expression , rna polymerase ii , dna , transcriptional regulation , rna polymerase ii holoenzyme , rna , botany , philosophy , linguistics

Cyanobacteria (blue-green algae) are photosynthesizing organisms that can be used as a model for analyzing light-responsive gene expression. The regulatory system of the light-responsive psbA gene with cis-elements and trans-acting factors was studied at both transcriptional and post-transcriptional levels. Positive regulation comprises DNA curvatures (CIT and RIB), upstream elements (UPE and promoter), and a light-induced sigma factor (SigD) of RNA polymerase in transcription. On the other hand, negative regulation involves mRNA instability through an AU-box under darkness. This two-step process is a candidate for a novel mechanism regulating light-responsive gene expression.

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