细菌细胞周期的空间复杂性与调控
Spatial complexity and control of a bacterial cell cycle.
作者信息
Collier Justine, Shapiro Lucy
机构信息
Department of Developmental Biology, School of Medicine, Beckman Center, Stanford University, Stanford, CA 94305, USA.
出版信息
Curr Opin Biotechnol. 2007 Aug;18(4):333-40. doi: 10.1016/j.copbio.2007.07.007. Epub 2007 Aug 20.
Abstract
A major breakthrough in understanding the bacterial cell cycle is the discovery that bacteria exhibit a high degree of intracellular organization. Chromosomal loci and many protein complexes are positioned at particular subcellular sites. In this review, we examine recently discovered control mechanisms that make use of dynamically localized protein complexes to orchestrate the Caulobacter crescentus cell cycle. Protein localization, notably of signal transduction proteins, chromosome partition proteins, and proteases, serves to coordinate cell division with chromosome replication and cell differentiation. The developmental fate of daughter cells is decided before completion of cytokinesis, via the early establishment of cell polarity by the distribution of activated signaling proteins, bacterial cytoskeleton, and landmark proteins.
摘要
在理解细菌细胞周期方面的一个重大突破是发现细菌呈现出高度的细胞内组织性。染色体位点和许多蛋白质复合物定位于特定的亚细胞位点。在本综述中，我们研究了最近发现的利用动态定位的蛋白质复合物来协调新月柄杆菌细胞周期的控制机制。蛋白质定位，特别是信号转导蛋白、染色体分配蛋白和蛋白酶的定位，有助于协调细胞分裂与染色体复制以及细胞分化。子细胞的发育命运在胞质分裂完成之前就已决定，这是通过激活的信号蛋白、细菌细胞骨架和标志性蛋白的分布来早期建立细胞极性实现的。
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