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首页> 外文期刊>Journal of bacteriology >Methylation-independent and methylation-dependent chemotaxis in Rhodobacter sphaeroides and Rhodospirillum rubrum.
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Methylation-independent and methylation-dependent chemotaxis in Rhodobacter sphaeroides and Rhodospirillum rubrum.

机译:球形红细菌和红螺旋体中的甲基化非依赖性和甲基化非依赖性。

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In vivo and in vitro methylation, methanol production assays, and the use of specific antibodies raised against the sensory transducing protein Tar in Escherichia coli all failed to demonstrate the presence of methyl-accepting chemotaxis proteins (MCPs) in the photosynthetic bacterium Rhodobacter sphaeroides, although such proteins did exist in another photosynthetic bacterium, Rhodospirillum rubrum. The range of chemicals to which Rhodobacter sphaeroides responds, the lack of an all-or-none response, and the lack of true repellents indicate an alternative chemosensory pathway. The existence of MCPs in Rhodospirillum rubrum means that the lack of MCPs is not the result of a phototrophic metabolism, but may be connected to the unidirectional flagellar motor of Rhodobacter sphaeroides.
机译:尽管在体内和体外甲基化,甲醇生产测定以及在大肠杆菌中使用针对感官转导蛋白Tar的特异性抗体的使用都未能证明光合细菌球形红细菌Rhodobacter sphaeroides中存在接受甲基的趋化蛋白(MCP)。这样的蛋白质确实存在于另一种光合细菌-红螺螺旋藻中。球形红细菌对化学物质的反应范围广,缺乏全无反应以及缺乏真正的驱避剂表明了另一种化学感觉途径。红螺螺旋藻中MCP的存在意味着MCP的缺乏不是光养代谢的结果,而是可能与球形球形红细菌的单向鞭毛运动有关。

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