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. 1979 Aug 24;6(12):3831–3843. doi: 10.1093/nar/6.12.3831

Reverse transcriptase mediated binding of primer tRNA to the viral genome.

A Araya, L Sarih, S Litvak
PMCID: PMC327981  PMID: 91158

Abstract

A complex between tRNATrp (beef) and 35 S RNA from avian myeloblastosis virus is obtained when the mixture is preincubated in the presence of reverse transcriptase at 35 degrees C. The tRNA-RNA complex is active in initiating DNA synthesis catalyzed by reverse transcriptase. The interaction of tRNA with reverse transcriptase involves the partial unwinding of the acceptor stem of tRNA, as evidenced by nuclease digestion with RNAase T1 and micrococcal nuclease. When tRNA2Glu (coli), having a high degree of similarity with primer tRNA at the level of the acceptor stem, was used as primer for DNA synthesis, a low but significant level of incorporation was obtained, if the reaction was performed at 35 degrees C, while a high incorporation, similar to the one obtained with tRNATrp was obtained when the annealing between tRNA2Glu and 35 S RNA was performed at 80 degrees C. Our evidences point out to an important role of the viral DNA polymerase in positioning the primer on the RNA genome.

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Selected References

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