Delineating the Structural Blueprint of the Pre-mRNA 3′-End Processing Machinery
Author(s) -
Kehui Xiang,
Liang Tong,
James L. Manley
Publication year - 2014
Publication title -
molecular and cellular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.14
H-Index - 327
eISSN - 1067-8824
pISSN - 0270-7306
DOI - 10.1128/mcb.00084-14
Subject(s) - polyadenylation , biology , cleavage and polyadenylation specificity factor , blueprint , messenger rna , cleavage factor , cleavage stimulation factor , directionality , computational biology , microbiology and biotechnology , precursor mrna , post transcriptional modification , cleavage (geology) , genetics , gene , rna splicing , rna , rna binding protein , engineering , paleontology , fracture (geology) , mechanical engineering
Processing of mRNA precursors (pre-mRNAs) by polyadenylation is an essential step in gene expression. Polyadenylation consists of two steps, cleavage and poly(A) synthesis, and requires multiple cis elements in the pre-mRNA and a megadalton protein complex bearing the two essential enzymatic activities. While genetic and biochemical studies remain the major approaches in characterizing these factors, structural biology has emerged during the past decade to help understand the molecular assembly and mechanistic details of the process. With structural information about more proteins and higher-order complexes becoming available, we are coming closer to obtaining a structural blueprint of the polyadenylation machinery that explains both how this complex functions and how it is regulated and connected to other cellular processes.
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