Journal
RNA
Volume 8, Issue 7, Pages 913-923Publisher
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1017/S1355838202022057
Keywords
eukaryotic translation initiation protein-RNA complexes
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Funding
- PHS HHS [A147365] Funding Source: Medline
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Translation of the hepatitis C virus genomic RNA is mediated by an internal ribosome entry site (IRES). The 330-nt IRES RNA forms a binary complex with the small 40S ribosomal subunit as a first step in translation initiation. Here chemical probing and 4-thiouridine-mediated crosslinking are used to characterize the interaction of the HCV IRES with the HeLa 40S subunit. No IRES-18S rRNA contacts were detected, but several specific crosslinks to 40S ribosomal proteins were observed. The identity of the crosslinked proteins agrees well with available structural information and provides new insights into HCV IRES function. The protein-rich surface of the 40S subunit thus mediates the IRES-ribosome interaction.
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