Chromosome organization and segregation in bacteria.

Thanbichler, M.; Shapiro, L.

doi:10.1016/j.jsb.2006.05.007

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Chromosome organization and segregation in bacteria.

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Thanbichler, M.
Max Planck Fellow Bacterial Cell Biology, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Citation

Thanbichler, M., & Shapiro, L. (2006). Chromosome organization and segregation in bacteria. Journal of Structural Biology, 156, 292-303. doi:10.1016/j.jsb.2006.05.007.

Cite as: https://hdl.handle.net/21.11116/0000-0007-C757-7

Abstract

In the recent years, considerable advances have been made towards understanding the structure and function of the bacterial chromosome. A number of different factors appear to cooperate in condensing DNA into a highly dynamic assembly of supercoiled loops. Despite this variability in the lower levels of chromatin structure, the global arrangement of chromosomal DNA within the cell is surprisingly conserved, with loci being arrayed along the cellular long axis in line with their order on the genomic map. This conserved pattern is propagated during the course of DNA segregation. First, after entry into S-phase, the newly synthesized origin regions are segregated in an active and directed process, involving the bacterial actin homolog MreB. Subsequent DNA segments then follow by different mechanisms. They are separated immediately after release from the replisome and move rapidly to their conserved positions in the incipient daughter cell compartments. Partitioning of the bacterial chromosome thus takes place while DNA replication is in progress.