Tombusvirus recruitment of host translational machinery via the 3' UTR.

ABSTRACT: RNA viruses recruit the host translational machinery by different mechanisms that depend partly on the structure of their genomes. In this regard, the plus-strand RNA genomes of several different pathogenic plant viruses do not contain traditional translation-stimulating elements, i.e., a 5'-cap structure and a 3'-poly(A) tail, and instead rely on a 3'-cap-independent translational enhancer (3'CITE) located in their 3' untranslated regions (UTRs) for efficient synthesis of viral proteins. We investigated the structure and function of the I-shaped class of 3'CITE in tombusviruses--also present in aureusviruses and carmoviruses--using biochemical and molecular approaches and we determined that it adopts a complex higher-order RNA structure that facilitates translation by binding simultaneous

SUBMITTER: Nicholson BL 

PROVIDER: S-EPMC2885689 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature