Exception to the exception rule: synthetic and naturally occurring single chromosome Vibrio cholerae

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Abstract

The genome of Vibrio cholerae, the etiological agent of cholera, is an exception to the single chromosome rule found in the vast majority of bacteria and has its genome partitioned between two unequally sized chromosomes. This unusual two-chromosome arrangement in V. cholerae has sparked considerable research interest since its discovery. It was demonstrated that the two chromosomes could be fused by deliberate genome engineering or forced to fuse spontaneously by blocking the replication of Chr2, the secondary chromosome. Recently, natural isolates of V. cholerae with chromosomal fusion have been found. Here, we summarize the pertinent findings on this exception to the exception rule and discuss the potential utility of single-chromosome V. cholerae to address fundamental questions on chromosome biology in general and DNA replication in particular.

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Sozhamannan, S., & Waldminghaus, T. (2020, October 1). Exception to the exception rule: synthetic and naturally occurring single chromosome Vibrio cholerae. Environmental Microbiology. Blackwell Publishing Ltd. https://doi.org/10.1111/1462-2920.15002

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