Reference: Ashley C, et al. (2002) Roles of mouse UBC13 in DNA postreplication repair and Lys63-linked ubiquitination. Gene 285(1-2):183-91

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Abstract


The E2 enzyme, Ubc13, and the E2 enzyme variants, Uevs, form stable, high affinity complexes for the assembly of Lys63-linked ubiquitin chains. This process is involved in error-free DNA postreplication repair, the activation of kinases in the NF-kappaB signaling pathway and possibly other cellular processes. To further investigate the roles played by Ubc13 in a whole animal model, we report here the molecular cloning of mouse UBC13 and show for the first time that a mammalian UBC13 gene is able to complement the yeast ubc13 null mutant. Furthermore, in vitro analyses and a yeast two-hybrid assay show that mUbc13 is able to form stable complexes with various Uevs. In the presence of E1 and ATP, mUbc13 forms thiolesters with ubiquitin; however, the formation of Lys63-linked di-ubiquitin and multi-ubiquitin chains is dependent on Uevs. These results suggest that the roles of UBC13 are conserved throughout eukaryotes and that the mouse is an appropriate model for the study of Ubc13-mediated Lys63-linked ubiquitin signaling pathways in humans.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Ashley C, Pastushok L, McKenna S, Ellison MJ, Xiao W
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