DNA glycosylase activities for thymine residues damaged by ring saturation, fragmentation, or ring contraction are functions of endonuclease III in Escherichia coli.
Year: 1984
Type: article
Abstract: A DNA glycosylase activity that excises oxidized, fragmented thymine residues from a polydeoxyribonucleotide has been purified 9,500-fold to apparent homogeneity from Escherichia coli. The purified enzyme also excises thymine glycol and cleaves DNA at apurinic sites, and appears to be identical with E. coli DNA endonuclease III. The enzyme catalyzes the release of several different forms of oxidized thymine, including urea, methyltartronylurea and 5-hydroxy-5-methylhydantoin. The molecular weight of the native protein is 25,000, and the same value is obtained for the denatured homogeneous protein by sodium dodecyl sulfate-polyacrylamide gel electrophoresis.
Source: Journal of Biological Chemistry
Authors: L H Breimer, T Lindahl
Language: English
Topic: DNA Repair Mechanisms
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $3,430
OpenAlex ID: W1570917001