Abstract
Distinct chromatin remodeling complexes can share a common ATPase subunit. The functional characteristics of each remodeling complex are determined by the respective ATPase-associated subunits. The Mi-2 nucleosome remodeling ATPase has so far only been shown to reside within Nucleosome Remodeling and Deacetylase (NuRD) complexes. Here we will review the recent discovery of two Mi-2 related remodelers that function independently of NuRD and that act as SUMO (small ubiquitin-related modifier)-dependent corepressors: First, Mi-2 exists in a novel chromatin remodeling complex, dMec, that does not rely on histone deacetylation to effect transcriptional repression of proneural genes. Second, the Mi-2 related factor dCHD3 acts as a monomer and does not associate with additional subunits in vivo. These recent results have uncovered an unanticipated complexity in the composition and function of CHD (Chromodomain-Helicase-DNA-binding) complexes.
Publication types
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Research Support, Non-U.S. Gov't
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Review
MeSH terms
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Adenosine Triphosphatases / metabolism
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Adenosine Triphosphatases / physiology*
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Adenosine Triphosphate / metabolism*
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Animals
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Autoantigens / metabolism
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Autoantigens / physiology*
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Caenorhabditis elegans / genetics
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Chromatin Assembly and Disassembly*
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DNA Helicases / metabolism
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DNA Helicases / physiology
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Drosophila / genetics
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Drosophila Proteins / metabolism
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Drosophila Proteins / physiology*
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Epigenesis, Genetic*
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Histone Deacetylases / metabolism
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Histone Deacetylases / physiology
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Mi-2 Nucleosome Remodeling and Deacetylase Complex
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Repressor Proteins / metabolism
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Repressor Proteins / physiology
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Small Ubiquitin-Related Modifier Proteins / metabolism
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Small Ubiquitin-Related Modifier Proteins / physiology
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Transcription Factors / metabolism
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Transcription Factors / physiology
Substances
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Autoantigens
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Drosophila Proteins
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Mi-2 protein, Drosophila
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Repressor Proteins
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Small Ubiquitin-Related Modifier Proteins
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Transcription Factors
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Adenosine Triphosphate
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Histone Deacetylases
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Mi-2 Nucleosome Remodeling and Deacetylase Complex
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Adenosine Triphosphatases
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CHD3 protein, Drosophila
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DNA Helicases