Yeast Sgf73/Ataxin-7 serves to anchor the deubiquitination module into both SAGA and Slik(SALSA) HAT complexes.
Spinocerebellar ataxia (SCA) is a physically devastating, genetically inherited disorder characterized by abnormal brain function that results in the progressive loss of the ability to coordinate movements. There are many types of SCAs as there are various gene mutations that can cause this disease. SCA types 1-3, 6-10, 12, and ... 17 result from a trinucleotide repeat expansion in the DNA-coding sequence. Intriguingly, recent work has demonstrated that increased trinucleotde expansions in the SCA7 gene result in defect in the function of the SAGA histone acetyltransferase complex. The SCA7 gene encodes a subunit of the SAGA complex. This subunit is conserved in yeast as the SGF73 gene. We demonstrate that Sgf73 is required to recruit the histone deubiquitination module into both SAGA and the related SliK(SALSA) complex, and to maintain levels of histone ubiquitination, which is necessary for regulation of transcription at a number of genes.
Mesh Terms:
Algorithms, Amino Acid Sequence, Computer Simulation, Humans, Ligands, Models, Molecular, Molecular Sequence Data, Peptides, Protein Binding, Protein Conformation, Reproducibility of Results, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins, Sequence Alignment, src Homology Domains
Algorithms, Amino Acid Sequence, Computer Simulation, Humans, Ligands, Models, Molecular, Molecular Sequence Data, Peptides, Protein Binding, Protein Conformation, Reproducibility of Results, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins, Sequence Alignment, src Homology Domains
Epigenetics Chromatin
Date: Feb. 20, 2009
PubMed ID: 19226466
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