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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Evidence of a transcriptional co-activator function of cohesin STAG/SA/Scc3.

Cohesins hold sister chromatids together from DNA replication until they are segregated. Although cohesins Smc1, Smc3, and Scc1/Rad21 are involved in chromatid cohesion and other cellular processes, little is known about the other mitotic cohesin subunit, Scc3/STAG. Here we describe STAG/Scc3, which may act as a transcriptional co-activator. STAG2 is able to enhance the activity of the tumor necrosis factor alpha, the CD69, and the human immunodeficiency virus long terminal repeat promoters in a NF-kappaB-dependent manner. In addition, STAG2 interacts with the viral transactivator Tat and enhances the Tat-mediated activation of the human immunodeficiency virus long terminal repeat promoter. Moreover, STAG2 co- activates a multimeric NF-kappaB reporter construct and enhances the activity of the transactivation domain of p65/RelA in a Gal4 system. This function is dependent on one of the LXXLL co-activation motives present in this cohesin and is substantiated by the interaction of STAG2 with the p65 subunit of NF-kappaB. These results describe a novel activity for cohesins, suggesting a role for STAG/Scc3 in transcriptional regulation.[1]

References

  1. Evidence of a transcriptional co-activator function of cohesin STAG/SA/Scc3. Lara-Pezzi, E., Pezzi, N., Prieto, I., Barthelemy, I., Carreiro, C., Martínez, A., Maldonado-Rodríguez, A., López-Cabrera, M., Barbero, J.L. J. Biol. Chem. (2004) [Pubmed]
 
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