茎状杆菌分化过程中细胞极性的表达

Craig Stephens , Urs Jenal , Lucille Shapiro
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引用次数: 6

摘要

月牙根杆菌在每次细胞分裂时产生两个不同的后代细胞,一个是活动的蜂群细胞,一个是无根的蜂群细胞。子代之间的形态和生理差异在分离前的前分裂细胞中表现出来。我们回顾了最近的工作检查机制负责分化的初期簇生和缠扰细胞区室。这些包括新复制染色体的差异转录,以及蛋白质在特定极点的靶向。强调极性鞭毛的生物合成是研究这些过程的一个模型。讨论了关于细胞极在不对称表达中的作用的假设。
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Expression of cell polarity during Caulobacter differentiation

The bacterium Caulobacter crescentus generates two distinct progeny cells, a motile swarmer cell and a sessile stalked cell, at every cell division. The dramatic morphological and physiological differences between the progeny are expressed in the predivisional cell prior to separation. We review recent work examining mechanisms responsible for differentiation of the incipient swarmer and stalked cell compartments. These include differential transcription of the newly replicated chromosomes, and targeting of proteins to specific poles. The biosynthesis of the polar flagellum is emphasized as a model for studying these processes. Hypotheses concerning the role of the cell poles in expression of asymmetry are discussed.

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