A proteomics analysis of yeast Mot1p protein-protein associations: insights into mechanism.

Arnett DR, Jennings JL, Tabb DL, Link AJ, Weil PA
Mol Cell Proteomics. 2008 7 (11): 2090-106

PMID: 18596064 · PMCID: PMC2577210 · DOI:10.1074/mcp.M800221-MCP200

Yeast Mot1p, a member of the Snf2 ATPase family of proteins, is a transcriptional regulator that has the unusual ability to both repress and activate mRNA gene transcription. To identify interactions with other proteins that may assist Mot1p in its regulatory processes, Mot1p was purified from replicate yeast cell extracts, and Mot1p-associated proteins were identified by coupled multidimensional liquid chromatography and tandem mass spectrometry. Using this approach we generated a catalog of Mot1p-interacting proteins. Mot1p interacts with a range of transcriptional co-regulators as well as proteins involved in chromatin remodeling. We propose that interaction with such a wide range of proteins may be one mechanism through which Mot1p subserves its roles as a transcriptional activator and repressor.

MeSH Terms (16)

Adenosine Triphosphatases Base Sequence Chromatin Assembly and Disassembly DNA, Fungal DNA Helicases Models, Molecular Molecular Weight Multiprotein Complexes Plasmids Protein Interaction Domains and Motifs Protein Interaction Mapping Proteomics Saccharomyces cerevisiae Saccharomyces cerevisiae Proteins Tandem Mass Spectrometry TATA-Binding Protein Associated Factors

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