Coordination between replication, segregation and cell division in multi-chromosomal bacteria: lessons from Vibrio cholerae

被引:13
作者
Espinosa, Elena [1 ]
Barre, Francois-Xavier [1 ]
Galli, Elisa [1 ]
机构
[1] Univ Paris Saclay, Univ Paris Sud, I2BC, CEA,CNRS, 1 Ave Terrasse, F-91198 Gif Sur Yvette, France
基金
欧洲研究理事会;
关键词
Vibrio cholerae; DNA replication; chromosome segregation; cell division; ESCHERICHIA-COLI CHROMOSOME; BACILLUS-SUBTILIS; DNA-REPLICATION; PROTEIN; SYSTEM; CYCLE; RING; SITE; ORGANIZATION; MECHANISMS;
D O I
10.2436/20.1501.01.293
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Bacteria display a highly flexible cell cycle in which cell division can be temporally disconnected from the replication/segregation cycle of their genome. The accuracy of genetic transmission is enforced by restricting the assembly of the cell division apparatus to the low DNA-density zones that develop between the regularly spaced nucleoids originating from the concurrent replication and segregation of genomic DNA. In most bacteria, the process is simplified because the genome is encoded on a single chromosome. This is notably the case in Escherichia coli, the most well studied bacterial model organism. However, similar to 10% of bacteria have domesticated horizontally acquired mega-plasmids into extra-numerous chromosomes. Most of our current knowledge on the cell cycle regulation of multi-chromosomal species derives from the study of replication, segregation and cell division in Vibrio cholerae, the agent of the deadly epidemic human diarrheal disease cholera. A nicety of this model is that it is closely related to E. coli in the phylogenetic tree of bacteria. Here, we review recent findings on the V. cholerae cell cycle in the context of what was previously known on the E. coli cell cycle.
引用
收藏
页码:121 / 129
页数:9
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