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Repair of ultraviolet-light-induced DNA damage in a highly pathogenic Gram-negative bacterium, Vibrio cholerae, has been examined. All three strains of V. cholerae belonging to two serotypes, Inaba and Ogawa, are very sensitive to ultraviolet irradiation, having inactivation cross-sections ranging from 0.18 to 0.24 m2/J. Although these cells are proficient in repairing the DNA damage by a photoreactivation mechanism, they do not possess efficient dark repair systems. The mild toxinogenic strain 154 of classical Vibrios presumably lacks any excision repair mechanism and studies of irradiated cell DNA indicate that the ultraviolet-induced pyrimidine dimers may not be excised. Ultraviolet-irradiated cells after saturation of dark repair can be further photoreactivated.
G Das, and
K Sil, and
J Das
August 1983,
The Journal of general virology,
G Das, and
K Sil, and
J Das
December 1990,
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G Das, and
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J Das
June 1971,
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G Das, and
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July 1995,
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G Das, and
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March 1990,
Mutation research,
G Das, and
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G Das, and
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G Das, and
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G Das, and
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June 1981,
Proceedings of the National Academy of Sciences of the United States of America,
G Das, and
K Sil, and
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January 1982,
Basic life sciences,
