Isolation and characterization of a UV-sensitive mutator (mutB1) mutant of Haemophilus influenzae.
AUTOR(ES)
Walter, R B
RESUMO
The mutB1 mutant of Haemophilus influenzae is very sensitive to UV radiation but only slightly sensitive to methylmethane sulfonate or N-methyl-N'-nitro-N-nitrosoguanidine. Cultures of mutB1 cells contain high numbers of spontaneous mutants and show hypermutability after exposure to the latter mutagen. Normally high-efficiency transforming markers, as well as low-efficiency ones, transform mutB1 recipients at similarly low efficiencies. Significant host cell reactivation was observed when mutB1 cells were exposed to UV-damaged phage; however, these mutants showed a decrease in phage recombination. This mutant did not degrade its DNA following exposure to UV. It is speculated that the mutB1 mutation is similar to the Escherichia coli uvrD mutation.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=211168Documentos Relacionados
- Cloning and characterization of the Haemophilus influenzae mutB gene.
- Isolation of recombination-defective and UV-sensitive mutants of Bacillus megaterium.
- Characterization of Lactococcus lactis UV-sensitive mutants obtained by ISS1 transposition.
- A Meiotic Uv-Sensitive Mutant That Causes Deletion of Duplications in Neurospora
- Postincision steps of photoproduct removal in a mutant of Bacillus cereus 569 that produces UV-sensitive spores.