Nucleic Acids Research, Vol 25, Issue 5 1002-1008, Copyright © 1997 by Oxford University Press
S Davey, ML Nass, JV Ferrer, K Sidik, A Eisenberger, DL Mitchell and GA Freyer
In addition to nucleotide excision repair (NER), the fission yeast
Schizosaccharomyces pombe possesses a UV damage endonuclease (UVDE) for the
excision of cyclobutane pyrimidine dimers and 6-4 pyrimidine pyrimidones.
We have previously described UVDE as part of an alternative excision repair
pathway, UVDR, for UV damage repair. The existence of two excision repair
processes has long been postulated to exist in S.pombe, as NER-deficient
mutants are still proficient in the excision of UV photoproducts. UVDE
recognizes the phosphodiester bond immediately 5'of the UV photoproducts as
the initiating event in this process. We show here that UVDE activity is
inducible at both the level of uve1+ mRNA and UVDE enzyme activity.
Further, we show that UVDE activity is regulated by the product of the
rad12 gene.
ARTICLES
The fission yeast UVDR DNA repair pathway is inducible
Cancer Research Laboratories, Queen's University, Kingston, Canada K7L 3N6.
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