Characterization of a UV endonuclease gene from the fisson yeast Schizosaccharomyces pombe and its bacterial homolog

Masashi Takao, Rie Yonemasu, Kazuo Yamamoto, Akira Yasui

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

From the fission yeast Schizosaccharomyces pombe, a cDNA fragment was isolated, which confers UV resistance on repair deficient Escherichia coli host cells. The cloned cDNA encodes a protein of 68 815 Da, which has a 36.6% identity of amino acid sequence with the previously identified 74 kDa UV endonuclease of the filamentous fungus Neurospora crassa. Analysis of several truncated gene constructs shows that only the C-terminal two thirds region, which has 54% identity of amino acid sequence with the C-terminal region of the Neurospora homolog, is necessary for complementing activity of UV-sensitivity in the E.coli host cells. Purified recombinant protein from E.coli host cells incises both UV-induced cyclobutane pyrimidine dimers and (6-4) photoproducts at the sites immediately 5' to the DNA damage in the same fashion as the Neurospora protein. Furthermore, a bacterial homologous sequence was isolated from Bacillus subtilis and shows a similar complementing activity of UV sensitivity in E.coli host cells, indicating a wide distribution of this alternative excision repair mechanism in life.

Original languageEnglish
Pages (from-to)1267-1271
Number of pages5
JournalNucleic acids research
Volume24
Issue number7
DOIs
Publication statusPublished - 1996

ASJC Scopus subject areas

  • Genetics

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