期刊
BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS
卷 1829, 期 6-7, 页码 561-570出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bbagrm.2013.01.003
关键词
mRNA decay; Ribonuclease; CNOT6; CNOT6L; CNOT7; CNOT8
资金
- Deutsche Forschungsgemeinschaft
- Land Sachsen-Anhalt
- Biotechnology and Biological Sciences Research Council (BBSRC)
- Medical Research Council (MRC)
- Association for International Cancer Research (AICR)
Shortening and removal of the 3' poly(A) tail of mature mRNA by poly(A)-specific 3' exonucleases (deadenylases) is the initial and often rate-limiting step in mRNA degradation. The majority of cytoplasmic deadenylase activity is associated with the Ccr4-Not and Pan2-Pan3 complexes. Two distinct catalytic sub-units, Caf1/Pop2 and Ccr4, are associated with the Ccr4-Not complex, whereas the Pan2 enzymatic subunit forms a stable complex with Pan3. In this review, we discuss the composition and activity of these two deadenylases. In addition, we comment on generic and specific mechanisms of recruitment of Ccr4-Not and Pan2-Pan3 to mRNAs. Finally, we discuss specialised and redundant functions of the deadenylases and review the importance of Ccr4-Not subunits in the regulation of physiological processes. This article is part of a Special Issue entitled: RNA Decay mechanisms. (C) 2013 Elsevier B.V. All rights reserved.
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