XB-ART-39978
Chromosome Res.
January 1, 2009;
17
(2):
251-63.
The unnamed complex: what do we know about Smc5-Smc6?
De Piccoli G
,
Torres-Rosell J
,
Aragón L
.
Abstract
The structural maintenance of chromosome (SMC) proteins constitute the cores of three protein complexes involved in chromosome metabolism; cohesin, condensin and the
Smc5-
Smc6 complex. While the roles of cohesin and condensin in sister chromatid cohesion and chromosome condensation respectively have been described, the cellular function of
Smc5-
Smc6 is as yet not understood, consequently the less descriptive name. The complex is involved in a variety of DNA repair pathways. It contains activities reminiscent of those described for cohesin and condensin, as well as several DNA helicases and endonucleases. It is required for sister chromatid recombination, and
smc5-
smc6 mutants suffer from the accumulation of unscheduled recombination intermediates. The complex contains a SUMO-ligase and potentially an ubiquitin-ligase; thus
Smc5-
Smc6 might presently have a dull name, but it seems destined to be recognized as a key player in the maintenance of chromosome stability. In this review we summarize our present understanding of this enigmatic protein complex.
PubMed ID:
19308705
Article link:
Chromosome Res.
Genes referenced:
smc5
smc6
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