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The Ccr4-Not complex is a global regulator of transcription that affects genes positively and negatively and is thought to regulate transcription factor TFIID .
The Ccr4-Not complex is a global regulator of gene expression that is conserved from yeast to human. It affects genes positively and negatively and is thought to regulate transcription factor IID function. In Saccharomyces cerevisiae, it exists in two prominent forms and consists of at least nine core subunits: the five Not proteins (Not1p to Not5p), Caf1p, Caf40p, Caf130p and Ccr4p [PUBMED:10637334]. The Ccr4-Not complex regulates many different cellular functions, including RNA degradation and transcription initiation. It may be a regulatory platform that senses nutrient levels and stress [PUBMED:12957374]. Caf1p and Ccr4p, are directly involved in mRNA deadenylation, and Caf1p is associated with Dhh1p, a putative RNA helicase thought to be a component of the decapping complex [PUBMED:11696541]. Pop2, a component of the Ccr4-Not complex, functions as a deadenylase [PUBMED:18430587].