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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1989 Nov;86(22):8693–8697. doi: 10.1073/pnas.86.22.8693

Isolation and characterization of the human uracil DNA glycosylase gene.

T M Vollberg 1, K M Siegler 1, B L Cool 1, M A Sirover 1
PMCID: PMC298354  PMID: 2813420

Abstract

A series of anti-human placental uracil DNA glycosylase monoclonal antibodies was used to screen a human placental cDNA library in phage lambda gt11. Twenty-seven immunopositive plaques were detected and purified. One clone containing a 1.2-kilobase (kb) human cDNA insert was chosen for further study by insertion into pUC8. The resultant recombinant plasmid selected by hybridization a human placental mRNA that encoded a 37-kDa polypeptide. This protein was immunoprecipitated specifically by an anti-human placental uracil DNA glycosylase monoclonal antibody. RNA blot-hybridization (Northern) analysis using placental poly(A)+ RNA or total RNA from four different human fibroblast cell strains revealed a single 1.6-kb transcript. Genomic blots using DNA from each cell strain digested with either EcoRI or Pst I revealed a complex pattern of cDNA-hybridizing restriction fragments. The genomic analysis for each enzyme was highly similar in all four human cell strains. In contrast, a single band was observed when genomic analysis was performed with the identical DNA digests with an actin gene probe. During cell proliferation there was an increase in the level of glycosylase mRNA that paralleled the increase in uracil DNA glycosylase enzyme activity. The isolation of the human uracil DNA glycosylase gene permits an examination of the structure, organization, and expression of a human DNA repair gene.

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Selected References

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