The Journal of General and Applied Microbiology
Online ISSN : 1349-8037
Print ISSN : 0022-1260
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Involvement of the response regulator CtrA in the extracellular DNA production of the marine bacterium Rhodovulum sulfidophilum
Hiroyuki KomatsuJunya YamamotoHiromichi SuzukiNobuyoshi NagaoYuu HiroseTakashi OhyamaSo UmekageYo Kikuchi
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2018 Volume 64 Issue 3 Pages 103-107

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Abstract

The marine bacterium Rhodovulum sulfidophilum is a nonsulfur phototrophic bacterium, which is known to produce extracellular nucleic acids in soluble form in culture medium. In the present paper, constructing the response regulator ctrA-deficient mutant of R. sulfidophilum, we found that this mutation causes a significant decrease in the extracellular DNA production. However, by the introduction of a plasmid containing the wild type ctrA gene into the mutant, the amount of extracellular DNA produced was recovered. This is the first and clear evidence that the extracellular DNA production is actively controlled by the CtrA in R. sulfidophilum.

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© 2018, Applied Microbiology, Molecular and Cellular Biosciences Research Foundation
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