Characterization of four rice UEV1 genes required for Lys63-linked polyubiquitination and distinct functions

BackgroundThe error-free branch of the DNA-damage tolerance (DDT) pathway is orchestrated by Lys63-linked polyubiquitination of proliferating cell nuclear antigen (PCNA), and this polyubiquitination is mediated by a Ubc13-Uev complex in yeast. We have previously cloned OsUBC13 from rice, whose product functions as an E2 to promote Lys63-linked ubiquitin chain assembly in the presence of yeast or human Uev.ResultsHere we identify four highly conserved UEV1 genes in rice whose products are able to form stable heterodimers with OsUbc13 and mediate Lys63-linked ubiquitin chain assembly. Expression of OsUEV1s is able to rescue the yeast mms2 mutant from death caused by DNA-damaging agents. Interestingly, OsUev1A contains a unique C-terminal tail with a conserved prenylation site not found in the other three OsUev1s, and this post-translational modification appears to be required for its unique subcellular distribution and association with the membrane. The analysis of OsUEV1 expression profiles obtained from the Genevestigator database indicates that these genes are differentially regulated.ConclusionsWe speculate that different OsUev1s play distinct roles by serving as a regulatory subunit of the Ubc13-Uev1 complex to respond to diverse cellular, developmental and environmental signals.

• Publication year

  2017

• Venue

  BMC Plant Biology

• Publication date

  2017-07-17

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.1186/s12870-017-1073-8PMID 28716105PMCID 5513143
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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