Published 2010 | Version v1
Journal article

Delineation of the Xrcc4-interacting region in the globular head domain of Cernunnos/XLF

Contributors

Others:

Description

In mammals, the majority of DNA double-strand breaks are processed by the Non Homologous End-Joining pathway (NHEJ), composed of seven factors: Ku70, Ku80, DNA-PKcs, Artemis, Xrcc4 (X4), DNA Ligase IV (L4) and Cernunnos/XLF. Cernunnos is part of the ligation complex, constituted by X4 and L4. In order to improve our knowledge on the structure and function of Cernunnos, we performed a systematic mutagenesis study on positions selected from an analysis of the recent 3D structures of this factor. Ten out of 27 screened mutants were non functional in several DNA repair assays. Outside amino acids critical for the expression and stability of Cernunnos, we identified three amino acids (Arg$^{64}$, Leu$^{65}$, and Leu$^{115}$) essential for the interaction with X4 and the proper function of Cernunnos. Docking the crystal structures of the two factors further validated this probable interaction surface of Cernunnos with X4.

Abstract

International audience

Additional details

Identifiers

URL
https://hal.archives-ouvertes.fr/hal-00493716
URN
urn:oai:HAL:hal-00493716v1

Origin repository

Origin repository
UNICA