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Cited by 354

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Molecular cloning and functional expression of a human cDNA encoding the antimutator enzyme 8-hydroxyguanine-DNA glycosylase

Open access
Roldán-Arjona, Teresa, Wei, Ying-Fei, Carter, Kenneth C., Klungland, Arne, Anselmino, Catherine, Wang, Rui-Ping, Augustus, Meena, Lindahl, Tomas·1997·Proceedings of the National Academy of Sciences

Abstract

The major mutagenic base lesion in DNA caused by exposure to reactive oxygen species is 8-hydroxyguanine (8-oxo-7,8-dihydroguanine). In bacteria and Saccharomyces cerevisiae , this damaged base is excised by a DNA glycosylase with an associated lyase activity for chain cleavage. We have cloned, sequenced, and expressed a human cDNA with partial sequence homology to the relevant yeast gene. The encoded 47-kDa human enzyme releases free 8-hydroxyguanine from oxidized DNA and introduces a chain break in a double-stranded oligonucleotide specifically at an 8-hydroxyguanine residue base paired with cytosine. Expression of the human protein in a DNA repair-deficient E. coli mutM mutY strain partly suppresses its spontaneous mutator phenotype. The gene encoding the human enzyme maps to chromosome 3p25. These results show that human cells have an enzyme that can initiate base excision repair at mutagenic DNA lesions caused by active oxygen.

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Metadata

Authors
Roldán-Arjona, T., Wei, Y.-F., Carter, K. C., Klungland, A., Anselmino, C., Wang, R.-P., Augustus, M., & Lindahl, T.
Venue
Proceedings of the National Academy of Sciences
Published
1997-07-22
Volume
94
Issue
15
Pages
8016-8020
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2085877659
Cited by
354
References
1
FWCI
11.36
Type
journal article
Language
en
Open access
green

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Roldán-Arjona, T., Wei, Y.-F., Carter, K. C., Klungland, A., Anselmino, C., Wang, R.-P., Augustus, M., & Lindahl, T. (1997). Molecular cloning and functional expression of a human cDNA encoding the antimutator enzyme 8-hydroxyguanine-DNA glycosylase. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.94.15.8016

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