XRCC4:DNA ligase IV can ligate incompatible DNA ends and can ligate across gaps

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XRCC4:DNA ligase IV can ligate incompatible DNA ends and can ligate across gaps.

XRCC4 and DNA ligase IV form a complex that is essential for the repair of all double-strand DNA breaks by the nonhomologous DNA end joining pathway in eukaryotes. We find here that human XRCC4:DNA ligase IV can ligate two double-strand DNA ends that have fully incompatible short 3' overhang configurations with no potential for base pairing. Moreover, at DNA ends that share 1-4 annealed base pa...

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Single-stranded DNA ligation and XLF-stimulated incompatible DNA end ligation by the XRCC4-DNA ligase IV complex: influence of terminal DNA sequence

The double-strand DNA break repair pathway, non-homologous DNA end joining (NHEJ), is distinctive for the flexibility of its nuclease, polymerase and ligase activities. Here we find that the joining of ends by XRCC4-ligase IV is markedly influenced by the terminal sequence, and a steric hindrance model can account for this. XLF (Cernunnos) stimulates the joining of both incompatible DNA ends an...

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ژورنال

عنوان ژورنال: The EMBO Journal

سال: 2007

ISSN: 0261-4189,1460-2075

DOI: 10.1038/sj.emboj.7601559