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Genetic basis for conversion of rough-to-smooth colony morphology in Actinobacillus actinomycetemcomitans.

ABSTRACT: The basis of the rough-to-smooth conversion of Actinobacillus actinomycetemcomitans was examined. Smooth variants often contained mutations at the flp promoter region. Replacing the mutated flp promoter with the wild-type promoter restored the rough phenotype. The expression level of the flp promoter was approximately 100-fold lower in smooth than in rough strains. Mutations of the flp promoter are a cause of the rough-to-smooth conversion.

SUBMITTER: Wang Y 

PROVIDER: S-EPMC1111812 | biostudies-literature | 2005 Jun

REPOSITORIES: biostudies-literature

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Genetic basis for conversion of rough-to-smooth colony morphology in Actinobacillus actinomycetemcomitans.

Wang Ying Y   Liu Amy A   Chen Casey C  

Infection and immunity 20050601 6

The basis of the rough-to-smooth conversion of Actinobacillus actinomycetemcomitans was examined. Smooth variants often contained mutations at the flp promoter region. Replacing the mutated flp promoter with the wild-type promoter restored the rough phenotype. The expression level of the flp promoter was approximately 100-fold lower in smooth than in rough strains. Mutations of the flp promoter are a cause of the rough-to-smooth conversion. ...[more]

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