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http://dx.doi.org/10.1007/s002940050313

has been cited by the following article:

• TITLE: Global Genome Nucleotide Excision Repair Proteins Rhp7p and Rhp41p Are Involved in Abasic Site Repair of Schizosaccharomyces pombe

  AUTHORS: Eiji Sakurai, Miyuki Susuki, Kyoichiro Kanamitsu, Shinji Kawano, Shogo Ikeda

  KEYWORDS: AP Site, Base Excision Repair, Global Genome Repair, Nucleotide Excision Repair, Schizosaccharomyces pombe

  JOURNAL NAME: Advances in Bioscience and Biotechnology, Vol.6 No.4, April 10, 2015

  ABSTRACT: The roles of nucleotide excision repair (NER) proteins in removing UV-induced lesions are well defined. There are two distinct NER pathways: global genome NER (GG-NER) and transcription-coupled NER. In human GG-NER, two heteromeric protein complexes, DDB1-DDB2 and XPC-RAD23, are responsible for initial lesion recognition. Here, we examined the genetic interactions between GG-NER and base excision repair (BER) genes during abasic (AP) site repair of Schizosaccharomyces pombe. Mutants of rhp7 (rhp7-rhp16 are functional homologs of DDB1-DDB2) and rhp41 (XPC homolog) were moderately sensitive to methyl methanesulfonate and slightly to sodium bisulfite. Nth1p most actively cleaves the AP site in S. pombe. Deletion of rhp7 or rhp41 from nth1Δ cells greatly increased their sensitivity to alkylation and deamination, indicating that Rhp7p and Rhp41p are involved in repair of the AP sites generated by the action of DNA glycosylase. Induction of rhp7 and rhp16 genes by different types of DNA damage supports the ability of GG-NER to remove non-bulky lesions. Therefore, GG-NER activity not only targets bulky DNA helix-distorting lesions, but can also efficiently remove AP sites synergistically with BER.