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. 1991 Aug 11;19(15):4199–4201. doi: 10.1093/nar/19.15.4199

Interaction of ribo- and deoxyriboanalogs of yeast tRNA(Phe) anticodon arm with programmed small ribosomal subunits of Escherichia coli and rabbit liver.

O V Koval'chuke 1, A P Potapov 1, A V El'skaya 1, V K Potapov 1, N F Krinetskaya 1, N G Dolinnaya 1, Z A Shabarova 1
PMCID: PMC328562  PMID: 1870974

Abstract

A synthetic ribooligonucleotide, r(CCAGACUGm-AAGAUCUGG), corresponding to the unmodified yeast tRNA(Phe) anticodon arm is shown to bind to poly(U) programmed small ribosomal subunits of both E. coli and rabbit liver with affinity two order less than that of a natural anticodon arm. Its deoxyriboanalogs d(CCAGACTGAAGATCTGG) and d(CCAGA)r(CUGm-AAGA)d(TCTGG), are used to study the influence of sugar-phosphate modification on the interaction of tRNA with programmed small ribosomal subunits. The deoxyribooligonucleotide is shown to adopt a hairpin structure. Nevertheless, as well as oligonucleotide with deoxyriboses in stem region, it is not able to bind to 30S or 40S ribosomal subunits in the presence of ribo-(poly(U] or deoxyribo-(poly (dT) template. The deoxyribooligonucleotide also has no inhibitory effect on tRNA(Phe) binding to 30S ribosomes at 10-fold excess over tRNA. Neomycin does not influence binding of tRNA anticodon arm analogs used. Complete tRNA molecule and natural modifications of anticodon arm are considered to stabilize the arm structure needed for its interaction with a programmed ribosome.

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Selected References

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