Mutagenesis at the ad-3A and ad-3B loci in haploid UV-sensitive strains of Neurospora crassa. II. Comparison of dose-response curves for inactivation and mutation induced by UV.
UV-induced inactivation and induction of mutations at the ad-3A and ad-3B loci of Neurospora crassa have been compared among 7 different UV-sensitive strains and a standard wild-type strain. The 7 strains show varying degrees of sensitivity to UV-induced inactivation, with the relative sensitivity being: uvs-2 greater than uvs-3 greater than uvs-4 greater than uvs-6 greater than upr-1 greater uvs-5 greater than uvs-1. Studies on the induction of ad-3 mutants by UV show that the 2 excision-repair deficient mutants uvs-2 and upr-1 exhibit enhanced ad-3 mutant frequencies, while uvs-4 and uvs-5 exhibit reduced ad-3 mutant frequencies, and uvs-3 completely eliminates UV mutagenesis. The ad-3 mutation-induction curves obtained with uvs-1 or uvs-6 are not significantly different from that found with the wild-type strain.
D000227:Adenine Nucleotides / Q000235:genetics; D004260:DNA Repair; D004307:Dose-Response Relationship, Radiation; D006238:Haploidy; D009154:Mutation; D009491:Neurospora / Q000235:genetics*; D009492:Neurospora crassa / Q000235:genetics* / Q000528:radiation effects; D011836:Radiation Tolerance; D014466:Ultraviolet Rays
D000227:Adenine Nucleotides