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doi:10.1534/genetics.105.053512
A more recent version of this article appeared on April 1, 2006.
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Mismatch Tolerance by DNA Polymerase Pol4 in the course of Nonhomologous End Joining in Saccharomyces cerevisiae
Benjamin Pardo 1, Emilie Ma 2 and Stéphane Marcand 1*
1 CEA/Fontenay
2 CEA/Saclay
* To whom correspondence should be addressed. E-mail: stephane.marcand{at}cea.fr.
Submitted on November 15, 2005
Revised on December 21, 2005
Accepted on 31 January 2006
In yeast, the nonhomologous end joining pathway (NHEJ) mobilizes the DNA polymerase Pol4 to repair DNA double-strand breaks when gap filling is required prior to ligation. Using telomere-telomere fusions caused by loss of the telomeric protein Rap1 and double-strand break repair on transformed DNA as assays for NHEJ between fully uncohesive ends, we show that Pol4 is able to extend a 3' end whose last bases are mismatched, i.e. mispaired or unpaired, to the template strand.
Key Words: NHEJ, PolX DNA polymerase, Rap1, telomeres
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