Authors
Krzysztof Treder, Elizabeth L Pettit Kneller, Edwards M Allen, Zhaohui Wang, Karen S Browning, W Allen Miller
Publication date
2008/1/1
Journal
Rna
Volume
14
Issue
1
Pages
134-147
Publisher
Cold Spring Harbor Lab
Description
The 3′ cap-independent translation element (BTE) of Barley yellow dwarf virus RNA confers efficient translation initiation at the 5′ end via long-distance base pairing with the 5′-untranslated region (UTR). Here we provide evidence that the BTE functions by recruiting translation initiation factor eIF4F. We show that the BTE interacts specifically with the cap-binding initiation factor complexes eIF4F and eIFiso4F in a wheat germ extract (wge). In wge depleted of cap-interacting factors, addition of eIF4F (and to a lesser extent, eIFiso4F) allowed efficient translation of an uncapped reporter construct (BLucB) containing the BTE in its 3′ UTR. Translation of BLucB required much lower levels of eIF4F or eIFiso4F than did a capped, nonviral mRNA. Both full-length eIF4G and the carboxy-terminal half of eIF4G lacking the eIF4E binding site stimulated translation to 70% of the level obtained with eIF4F, indicating a minor …
Total citations
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