Chromosome structure and DNA replication dynamics during the life cycle of the predatory bacterium Bdellovibrio bacteriovorus

被引:7
|
作者
Plaskowska, Karolina [1 ]
Zakrzewska-Czerwinska, Jolanta [1 ]
机构
[1] Univ Wroclaw, Fac Biotechnol, Dept Mol Microbiol, Ul Joliot Curie 14A, PL-50383 Wroclaw, Poland
关键词
bacterial life cycle; binary and nonbinary division; chromosome organization; initiation of chromosome replication; oriC; choreography of chromosome replication; NUCLEOID-ASSOCIATED PROTEINS; CELL-CYCLE; GENOME SEQUENCE; DIVISION; PREY; STREPTOMYCES; ORGANIZATION; SEGREGATION; RECOGNITION; SPORULATION;
D O I
10.1093/femsre/fuad057
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Bdellovibrio bacteriovorus, an obligate predatory Gram-negative bacterium that proliferates inside and kills other Gram-negative bacteria, was discovered more than 60 years ago. However, we have only recently begun to understand the detailed cell biology of this proficient bacterial killer. Bdellovibrio bacteriovorus exhibits a peculiar life cycle and bimodal proliferation, and thus represents an attractive model for studying novel aspects of bacterial cell biology. The life cycle of B. bacteriovorus consists of two phases: a free-living nonreplicative attack phase and an intracellular reproductive phase. During the reproductive phase, B. bacteriovorus grows as an elongated cell and undergoes binary or nonbinary fission, depending on the prey size. In this review, we discuss: (1) how the chromosome structure of B. bacteriovorus is remodeled during its life cycle; (2) how its chromosome replication dynamics depends on the proliferation mode; (3) how the initiation of chromosome replication is controlled during the life cycle, and (4) how chromosome replication is spatiotemporally coordinated with the proliferation program. A predatory bacterium, Bdellovibrio bacteriovorus possesses a tightly packed chromosome and exhibits a unique "asynchronous mode" of replication (re)initiation.
引用
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页数:10
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