DNA loop repair by human cell extracts
- PMID: 7973637
- DOI: 10.1126/science.7973637
DNA loop repair by human cell extracts
Abstract
An activity in human cell extracts is described that repairs DNA with loops of five or more unpaired bases. Repair is strand-specific and is directed by a nick located 5' or 3' to the loop. This repair is observed in a colorectal cancer cell line that is devoid of a wild-type hMLH1 gene and is deficient in repair of mismatches. However, a cell line with deletions in both hMSH2 alleles is deficient in repair of both loops and mismatches. Defects in loop repair may be relevant to the repetitive-sequence instability observed in cancers and other hereditary diseases.
Comment in
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DNA repair comes into its own.Science. 1994 Nov 4;266(5186):728-30. doi: 10.1126/science.7973626. Science. 1994. PMID: 7973626 No abstract available.
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