The Dharma of Nonsense-mediated MRNA Decay in Mammalian Cells

Overview

Journal Mol Cells

Publisher Elsevier

Specialties Cell Biology
Molecular Biology

Date 2014 Feb 21

PMID 24552703

Citations 40

Authors

Maximilian Wei-Lin Popp

Lynne E Maquat

Affiliations

Soon will be listed here.

Abstract

Mammalian-cell messenger RNAs (mRNAs) are generated in the nucleus from precursor RNAs (pre-mRNAs, which often contain one or more introns) that are complexed with an array of incompletely inventoried proteins. During their biogenesis, pre-mRNAs and their derivative mRNAs are subject to extensive cis-modifications. These modifications promote the binding of distinct polypeptides that mediate a diverse array of functions needed for mRNA metabolism, including nuclear export, inspection by the nonsense-mediated mRNA decay (NMD) quality-control machinery, and synthesis of the encoded protein product. Ribonucleoprotein complex (RNP) remodeling through the loss and gain of protein constituents before and after pre-mRNA splicing, during mRNA export, and within the cytoplasm facilitates NMD, ensuring integrity of the transcriptome. Here we review the mRNP rearrangements that culminate in detection and elimination of faulty transcripts by mammalian-cell NMD.

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