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Title: Antisense oligonucleotide inhibition of encephalomyocarditis virus RNA translation
Authors: Sankar, S. 
Cheah, K.-C.
Porter, A.G. 
Issue Date: 1989
Citation: Sankar, S.,Cheah, K.-C.,Porter, A.G. (1989). Antisense oligonucleotide inhibition of encephalomyocarditis virus RNA translation. European Journal of Biochemistry 184 (1) : 39-45. ScholarBank@NUS Repository.
Abstract: We report the inhibition of encephalomyocarditis virus (EMCV) RNA translation in cell-free rabbit reticulocyte lysates by antisense oligonucleotides (13-17-base oligomers) complementary to (a) the viral 5' non-translated region, (b) the AUG start codon and (c) the coding sequence. Our results demonstrate that the extent of translation inhibition is dependent on the region where the complementary oligonucleotides bind. Noncomplementary and 3'-non-translated-region-specific oligonucleotides had no effect on translation. A significant degree of translation inhibition was obtained with oligonucleotides complementary to the viral 5' non-translated region and AUG initiation codon. Digestion of the oligonucleotide:RNA hybrid by RNase H did not significantly increase translation inhibition in the case of 5'-non-translated-region-specific and initiator-AUG-specific oligonucleotides; in contrast, RNase H digestion was necessary for inhibition by the coding-region-specific oligonucleotide. We propose that (a) 5'-non-translated-region-specific oligonucleotides inhibit translation by affecting the 40S ribosome binding and/or passage to the AUG start codon, (b) AUG-specific oligonucleotides inhibit translation initiation by inhibiting the formation of an active 80S ribosome and (c) the coding-region-specific oligonucleotide does not prevent protein synthesis because the translating 80S ribosome can dislodge the oligonucleotide from the EMCV RNA template.
Source Title: European Journal of Biochemistry
ISSN: 00142956
Appears in Collections:Staff Publications

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