Cdk1 Restrains NHEJ through Phosphorylation of XRCC4-like Factor Xlf1
نویسندگان
چکیده
منابع مشابه
Cdk1 Restrains NHEJ through Phosphorylation of XRCC4-like Factor Xlf1
Eukaryotic cells use two principal mechanisms for repairing DNA double-strand breaks (DSBs): homologous recombination (HR) and nonhomologous end-joining (NHEJ). DSB repair pathway choice is strongly regulated during the cell cycle. Cyclin-dependent kinase 1 (Cdk1) activates HR by phosphorylation of key recombination factors. However, a mechanism for regulating the NHEJ pathway has not been esta...
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Non-homologous end joining (NHEJ) is a key cellular process ensuring genome integrity. Mutations in several components of the NHEJ pathway have been identified, often associated with severe combined immunodeficiency (SCID), consistent with the requirement for NHEJ during V(D)J recombination to ensure diversity of the adaptive immune system. In contrast, we have recently found that biallelic mut...
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XRCC4-like factor (XLF) is involved in non-homologous end joining-mediated repair of DNA double-strand breaks (DSBs). Mutations in the WRN gene results in the development of Werner syndrome (WS), a rare autosomal recessive disorder characterized by premature ageing and genome instability. In the present study, it was identified that XLF protein levels were lower in WRN-deficient fibroblasts, co...
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Non-Homologous End Joining (NHEJ) is an efficient mechanism to repair DNA double-strand breaks. XRCC4 and XLF are two structurally-similar core NHEJ proteins. They can directly interact at the protein-protein level and engage DNA by an unknown mechanism. Here, we use optical tweezers and fluorescence microscopy to visualize XRCC4XLF complexes on DNA in real time. We find that the behavior of XR...
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In eukaryotes, mRNA translation is dependent on the cap-binding protein eIF4E. Through its simultaneous interaction with the mRNA cap structure and with the ribosome-associated eIF4G adaptor protein, eIF4E physically posits the ribosome at the 5' extremity of capped mRNA. eIF4E activity is regulated by phosphorylation on a unique site by the eIF4G-associated kinase MNK. eIF4E assembly with the ...
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ژورنال
عنوان ژورنال: Cell Reports
سال: 2014
ISSN: 2211-1247
DOI: 10.1016/j.celrep.2014.11.044