3vp8

Structural highlights

Function

TUP1_YEAST Acts as component of the CYC8-TUP1 corepressor complex which is involved in the repression of many genes in a wide variety of physiological processes including heme-regulated and catabolite repressed genes. May also be involved in the derepression of at least some target genes. The complex is recruited to target genes by interaction with DNA-bound transcriptional repressors, like MATALPHA2, MIG1, RFX1 and SKO1. The complex recruits histone deacetylases to produce a repressive chromatin structure, interacts with hypoacetylated N-terminal tails of histones H3 and H4 that have been programmed for repression by the action of histone deacetylases and interferes directly with the transcriptional machinery by associating with the RNA polymerase II mediator complex.^{[1] [2] [3] [4] [5] [6] [7]}

References

1. ↑ Williams FE, Trumbly RJ. Characterization of TUP1, a mediator of glucose repression in Saccharomyces cerevisiae. Mol Cell Biol. 1990 Dec;10(12):6500-11. PMID:2247069
2. ↑ Watson AD, Edmondson DG, Bone JR, Mukai Y, Yu Y, Du W, Stillman DJ, Roth SY. Ssn6-Tup1 interacts with class I histone deacetylases required for repression. Genes Dev. 2000 Nov 1;14(21):2737-44. PMID:11069890
3. ↑ Papamichos-Chronakis M, Conlan RS, Gounalaki N, Copf T, Tzamarias D. Hrs1/Med3 is a Cyc8-Tup1 corepressor target in the RNA polymerase II holoenzyme. J Biol Chem. 2000 Mar 24;275(12):8397-403. PMID:10722672
4. ↑ Proft M, Pascual-Ahuir A, de Nadal E, Arino J, Serrano R, Posas F. Regulation of the Sko1 transcriptional repressor by the Hog1 MAP kinase in response to osmotic stress. EMBO J. 2001 Mar 1;20(5):1123-33. PMID:11230135 doi:10.1093/emboj/20.5.1123
5. ↑ Wu J, Suka N, Carlson M, Grunstein M. TUP1 utilizes histone H3/H2B-specific HDA1 deacetylase to repress gene activity in yeast. Mol Cell. 2001 Jan;7(1):117-26. PMID:11172717
6. ↑ Davie JK, Trumbly RJ, Dent SY. Histone-dependent association of Tup1-Ssn6 with repressed genes in vivo. Mol Cell Biol. 2002 Feb;22(3):693-703. PMID:11784848
7. ↑ Mennella TA, Klinkenberg LG, Zitomer RS. Recruitment of Tup1-Ssn6 by yeast hypoxic genes and chromatin-independent exclusion of TATA binding protein. Eukaryot Cell. 2003 Dec;2(6):1288-303. PMID:14665463