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Reference: Gravel S, et al. (1998) Yeast Ku as a regulator of chromosomal DNA end structure. Science 280(5364):741-4

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Abstract

During telomere replication in yeast, chromosome ends acquire an S-phase-specific overhang of the guanosine-rich strand. Here it is shown that in cells lacking Ku, a heterodimeric protein involved in nonhomologous DNA end joining, these overhangs are present throughout the cell cycle. In vivo cross-linking experiments demonstrated that Ku is bound to telomeric DNA. These results show that Ku plays a direct role in establishing a normal DNA end structure on yeast chromosomes, conceivably by functioning as a terminus-binding factor. Because Ku-mediated DNA end joining involving telomeres would result in chromosome instability, our data also suggest that Ku has a distinct function when bound to telomeres.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Gravel S, Larrivee M, Labrecque P, Wellinger RJ
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