ISSN:
1365-2958
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
,
Medicine
Notes:
The chromosomes of enteric bacteria are divided into about 50 independently supercoiled domains. It is not known whether the net level of DNA supercoiling is similar in each domain, or whether the domains are differentially supercoiled. We have addressed this question genetically, using a supercoiling-sensitive promoter to probe the relative levels of supercoiling at defined points around the Salmonella typhimurium chromosome. We conclude that, within the limits of resolution of this approach, the level of supercoiling does not differ significantly between chromosomal domains, and that each domain responds in a similar fashion to factors that perturb supercoiling. These findings have implications for the organization of the bacterial genome.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2958.1993.tb00940.x
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