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Gene Review

MMS2  -  E2 ubiquitin-conjugating protein MMS2

Saccharomyces cerevisiae S288c

Synonyms: UEV MMS2, Ubiquitin-conjugating enzyme variant MMS2, YGL087C
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High impact information on MMS2

  • RAD5 recruits the UBC13-MMS2 complex to DNA by means of its RING finger domain [1].
  • The mms2 mutant also displayed a REV3-dependent mutator phenotype, strongly suggesting that the MMS2 gene functions in the error-free postreplication repair pathway, parallel to the REV3 mutagenesis pathway [2].
  • MMS2, encoding a ubiquitin-conjugating-enzyme-like protein, is a member of the yeast error-free postreplication repair pathway [2].
  • We cloned the MMS2 gene from a yeast genomic library by functional complementation of the mms2-1 mutant [Prakash, L. & Prakash, S. (1977) Genetics 86, 33-55] [2].
  • MMS2 encodes a 137-amino acid, 15.2-kDa protein with significant sequence homology to a conserved family of ubiquitin-conjugating (Ubc) proteins [2].

Biological context of MMS2

  • Finally, it is shown that MMS2, like UBC13 and many other repair genes, is transcriptionally up-regulated in response to DNA damage [3].
  • Quantitative analysis of the affinity and kinetics of the UBC13-MMS2 interaction suggests a highly dynamic association model in which compromised mutual interactions result in phenotypic effects only under conditions where protein levels become limiting [4].
  • We showed previously that the products of the UBC13 and MMS2 genes function in error-free post-replicative DNA repair in the yeast Saccharomyces cerevisiae and form a complex that assembles Lys-63-linked polyubiquitin chains in vitro [5].

Other interactions of MMS2

  • Requirement of RAD5 and MMS2 for postreplication repair of UV-damaged DNA in Saccharomyces cerevisiae [6].
  • The srs2 suppressor of UV sensitivity acts specifically on the RAD5- and MMS2-dependent branch of the RAD6 pathway [3].


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