Differences in Regulation of Photosynthetic Gene Expression Between Different Purple Bacteria

doi:10.13560/j.cnki.biotech.bull.1985.2016.02.005

Abstract

Abstract: The purple bacteria are prokaryotes that can proceed photosynthesis without oxygen release.They use light energy to produce ATP for their own growth and metabolism.The photosystem of a purple bacterium consists of a series of complex of pigments and proteins encoded by photosynthetic genes like puc, puf, puh, bch, crt and so on.The expressions of their photosynthetic genes mainly are influenced by light and external redox signals；however, the expression and regulation mode of photosynthetic genes are greatly different between different kinds of purple bacteria.This review introduces the research advances on several expression and regulation systems of photosynthetic genes, such as PpsR/CrtJ like regulator, two-component phosphorylation regulation system and CRP-FNR like regulator in purple bacteria while focusing on Rhodobacter sphaeroides and Rhodopseudomonas palustris.The results from the functional and characteristic analysis of the regulation mechanism in different purple bacteria suggest that, each regulation system existing in different bacterial strain shows similar functions but with somewhat unique characteristics.This study gives us further insights for understanding the mechanisms of expression and regulation of photosynthetic genes in the purple bacteria, and provides important references for application of these purple bacteria in the future.

Key words: photosynthetic genes, Rhodobacter sphaeroides, Rhodopseudomonas palustris, purple bacteria

DENG Chun-hao, SUN Liang-yu, CHEN Kun-ming. Differences in Regulation of Photosynthetic Gene Expression Between Different Purple Bacteria[J]. Biotechnology Bulletin, 2016, 32(2): 21-29.

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