SpringerProtocols: Abstract: Detection of DNA Deoxyribophosphodiesterase Activity

Detection of DNA Deoxyribophosphodiesterase Activity

By: Margarita Sandigursky², William A. Franklin

Abstract

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The major pathway for the removal of oxidative base damage is the DNA base excision repair pathway, found in prokaryotes and eukaryotes (1). In this pathway, oxidized DNA bases are removed by specific DNA glycosylases, leaving apurinic/apyrimidinic (AP) sites in the DNA (1,2). AP sites can also arise spontaneously in DNA through depurination (3) and, being devoid of genetic information, can be both cytotoxic and mutagenic lesions (4–6). Several DNA glycosylases have been found that convert a variety of damaged nucleotide residues to AP sites by removing deaminated, oxidized, or alkylated bases from DNA. Uracil, either misincorporated in place of thymine or resulting from deamination of cytosine, is removed by a specific glycosylase, uracil-DNA glycosylase, found in prokaryotes and eukaryotes (1,4).

Affiliation(s): (2) Department of Radiology and Radiation Oncology, Albert Einstein College of Medicine, Bronx, NY

Book Title: DNA Repair Protocols: Prokaryotic Systems

Series: Methods in Molecular Biology | Volume: 152 | Pub. Date: Jul-07-2000 | Page Range: 39-48 | DOI: 10.1385/1-59259-068-3:39

Subject: Genetics/Genomics

References

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