Rad8Rad5/Mms2–Ubc13 ubiquitin ligase complex controls translesion synthesis in fission yeast

Coulon, Stéphane, Ramasubramanyan, Sharada, Alies, Carole, Philippin, Gaëlle, Lehmann, Alan and Fuchs, Robert P (2010) Rad8Rad5/Mms2–Ubc13 ubiquitin ligase complex controls translesion synthesis in fission yeast. EMBO Journal, 29 (12). pp. 2048-2058. ISSN 0261-4189

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Many DNA lesions cause pausing of replication forks at lesion sites; thus, generating gaps in the daughter strands that are filled-in by post-replication repair (PRR) pathways. In Saccharomyces cerevisiae, PRR involves translesion synthesis (TLS) mediated by Polη or Polζ, or Rad5-dependent gap filling through a poorly characterized error-free mechanism. We have developed an assay to monitor error-free and mutagenic TLS across single DNA lesions in Schizosaccharomyces pombe. For both main UV photolesions, we have delineated a major error-free pathway mediated by a distinct combination of TLS polymerases. Surprisingly, these TLS pathways require enzymes needed for poly-ubiquitination of proliferating cell nuclear antigen (PCNA) as well as those required for mono-ubiquitination. For pathways that require several TLS polymerases the poly-ubiquitin chains of PCNA may facilitate their recruitment through specific interactions with their multiple ubiquitin-binding motifs. These error-free TLS pathways may at least partially account for the previously described poly-ubiquitination-dependent error-free branch of PRR. This work highlights major differences in the control of lesion tolerance pathways between S. pombe and S. cerevisiae despite the homologous sets of PRR genes these organisms share.

Item Type: Article
Keywords: Post-replicative repair; Translesion synthesis; Ubiquitin ligase Rad6-Rad18; Ubiquitin ligase Rad8Rad5/Ubc13-Mms2; UV photoproducts
Schools and Departments: School of Life Sciences > Biochemistry
Subjects: Q Science > QD Chemistry > QD0241 Organic chemistry > QD0415 Biochemistry
Q Science > QH Natural history > QH0301 Biology > QH0426 Genetics
Depositing User: Gee Wheatley
Date Deposited: 16 Aug 2010
Last Modified: 02 Jul 2019 20:51
URI: http://sro.sussex.ac.uk/id/eprint/2451

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