Expression profile analysis of the oxygen response in the nitrogen-fixing Pseudomonas stutzeri A1501 by genome-wide DNA microarray
文献类型： 外文期刊
作者： Dou YueTan 1 ; Yan YongLiang 2 ; Ping ShuZhen 2 ; Lu Wei 2 ; Chen Ming 2 ; Zhang Wei 2 ; Wang YiPing 3 ; Jin Qi 4 ; Lin Min 1 ;
作者机构： 1.China Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R China
2.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing 100081, Peoples R China
3.Peking Univ, Coll Life Sci, Beijing 100871, Peoples R China
4.State Key Lab Mol Virol & Genet Engn, Beijing 100176, Peoples R China
期刊名称：CHINESE SCIENCE BULLETIN （ 影响因子：1.649； 五年影响因子：1.738 ）
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收录情况： SCI
摘要： Pseudomonas stutzeri A1501, an associative nitrogen-fixing bacterium, was isolated from the rice paddy rhizosphere. This bacterium fixes nitrogen under microaerobic conditions. In this study, genome-wide DNA microarrays were used to analyze the global transcription profile of A1501 under aerobic and microaerobic conditions. The expression of 135 genes was significantly altered by more than 2-fold in response to oxygen stress. Among these genes, 68 were down-regulated under aerobic conditions; these genes included those responsible for nitrogen fixation and denitrification. Sixty-seven genes were up-regulated under aerobic conditions; these genes included sodC, encoding a copper-zinc superoxide dismutase, PST2179, encoding an NAD(P)-dependent oxidoreductase, PST3584, encoding a 2OG-Fe(II) oxygenase, and PST3602, encoding an NAD(P)H-flavin oxidoreductase. Additionally, seven genes involved in capsular polysaccharide and antigen oligosaccharide biosynthesis together with 17 genes encoding proteins of unknown function were up-regulated under aerobic conditions. The overall analysis suggests that the genes we identified are involved in the protection of the bacterium from oxygen, but the mechanisms of their action remain to be elucidated.
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