Publication Date:
2002-09-14
Description:
The mechanism by which disruption of reading frame can influence pre-messenger RNA (pre-mRNA) processing is poorly understood. We assessed the role of factors essential for nonsense-mediated mRNA decay (NMD) in nonsense-mediated altered splicing (NAS) with the use of RNA interference (RNAi) in mammalian cells. Inhibition of rent1/hUpf1 expression abrogated both NMD and NAS of nonsense T cell receptor beta transcripts. In contrast, inhibition of rent2/hUpf2 expression did not disrupt NAS despite achieving comparable stabilization of nonsense transcripts. We also demonstrate that NAS and NMD are genetically separable functions of rent1/hUpf1. Additionally, rent1/hUpf1 enters the nucleus where it may directly influence early events in mRNA biogenesis. This provides compelling evidence that NAS relies on a component of the nonsense surveillance machinery but is not an indirect consequence of NMD.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mendell, Joshua T -- ap Rhys, Colette M J -- Dietz, Harry C -- GM55239/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2002 Oct 11;298(5592):419-22. Epub 2002 Sep 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Genetic Medicine and Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, 858 Ross Building, 720 Rutland Avenue, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12228722" target="_blank"〉PubMed〈/a〉
Keywords:
Active Transport, Cell Nucleus
;
*Alternative Splicing
;
Amino Acid Substitution
;
Blotting, Northern
;
Cell Nucleus/metabolism
;
*Codon, Nonsense
;
Cytoplasm/metabolism
;
Equilibrative-Nucleoside Transporter 2/genetics/metabolism
;
Fatty Acids, Unsaturated/pharmacology
;
Gene Silencing
;
Genes, T-Cell Receptor beta
;
HeLa Cells
;
Humans
;
Mutation
;
RNA Helicases/genetics/*metabolism
;
RNA, Messenger/genetics/*metabolism
;
RNA, Small Interfering/metabolism
;
Recombinant Fusion Proteins/metabolism
;
Trans-Activators/genetics/*metabolism
;
Transcription Factors/genetics/metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
