SWI/SNF Family Complex

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** Involved in transcriptional activation of numerous genes, yeast SWI2/SNF2 contains a highly conserved domain among helicases required for transcriptional activity. Mammalian SWI/SNF complexes are ATP-dependent chromatin remodeling enzymes implicated in regulation of gene expression, cell cycle control, and oncogenesis. The SWI/SNF complex is thought to facilitate transcriptional activation of specific genes by antagonizing chromatin-mediated transcriptional repression. The complex contains an ATP-dependent nucleosome disruption activity that can lead to enhanced binding of transcription factors. During mitosis, the human protein is phosphorylated, excluded from condensed chromosomes, and the protein level is strongly reduced. (from OMIM 600014 and NCI)

**Synonyms:** - Mating Type Switching/Sucrose Nonfermenting Protein