Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 384, Issue 3, Pages 334-340Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2009.04.123
Keywords
elF4AIII; Y14; Exon junction complex; Nonsense-mediated mRNA decay; Splicing; Internal ribosome entry site
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Funding
- Korea Health 21 RD Project
- Ministry of Health Welfare
- Republic of Korea [A062356]
- Korea government [2009-0078061, KRF-2008-314-C00247]
- National Research Foundation of Korea [2009-0078061] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Translation of spliced mRNAs is enhanced by exon junction complex (EJC), which is deposited on mRNAs as a result of splicing. Although this phenomenon itself is well known, the underlying molecular mechanism remains Poorly understood. Here we show, using siRNAs against Y14 and eIF4AIII and spliced or intronless Constructs that contain different types of internal ribosome entry sites (IRESes), that Y14 and eIF4AIII increase translation of spliced mRNAs before and after formation of the 80S ribosome complex, respectively. These results suggest that EJC modulates translation of spliced mRNA at multiple steps. (C) 2009 Elsevier Inc. All rights reserved.
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