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• W2152974876 abstract "The 3' end region of foot-and-mouth disease virus (FMDV) consists of two distinct elements, a 90 nt untranslated region (3'-NCR) and a poly(A) tract. Removal of either the poly(A) tract or both the 3'-NCR and the poly(A) tract abrogated infectivity in susceptible cells in the context of a full-length cDNA clone. We have addressed the question of whether the impairment of RNA infectivity is related to defects at the translation level using a double approach. First, compared to the full-length viral RNA, removal of the 3' sequences reduced the efficiency of translation in vitro. Secondly, a stimulatory effect of the 3' end sequences on IRES-dependent translation was found in vivo using bicistronic constructs. RNAs carrying the FMDV 3' end sequences linked to the second cistron showed a significant stimulation of IRES-dependent translation, whereas cap-dependent translation was not affected. Remarkably, IRES-dependent stimulation exerted by the poly(A) tract or the 3'-NCR seems to be the result of two separate events, as the 3'-NCR alone enhanced IRES activity on its own. Under conditions of FMDV Lb protease-induced translation shut-off, the stimulation of IRES activity reached values above 6-fold in living cells. A northern blot analysis indicated that IRES stimulation was not the consequence of a change in the stability of the bicistronic RNA produced in transfected cells. Analysis of the RNA-binding proteins interacting with a mixture of 3' end and IRES probes showed an additive pattern. Altogether, our results strongly suggest that individual signals in the viral 3' end ensure stimulation of FMDV translation." @default.
• W2152974876 created "2016-06-24" @default.
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• W2152974876 date "2002-10-15" @default.
• W2152974876 modified "2023-10-18" @default.
• W2152974876 title "IRES-driven translation is stimulated separately by the FMDV 3'-NCR and poly(A) sequences" @default.
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• W2152974876 doi "https://doi.org/10.1093/nar/gkf569" @default.
• W2152974876 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/137133" @default.
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