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禽肿瘤病毒基因组由RNA指导的DNA聚合酶进行体外转录:对在重建酶促反应中合成的DNA转录本的分析

In vitro transcription of theavian oncornavirus genome by the RNA-directed DNA polymerase: analysis of DNA transcripts synthesized in reconstructed enzymatic reactions.

作者信息

Collett M S, Faras A J

出版信息

J Virol. 1977 Apr;22(1):86-96. doi: 10.1128/JVI.22.1.86-96.1977.

Abstract

We have analyzed the DNA products synthesized in vitro in reconstructed reactions containing purified avian oncornavirus genome RNA and RNA-directed DNA polymerase. The results of these studies indicate that: (i) the initial DNA product synthesized on either 70S RNA or reconstituted 35S RNA-tRNAtrp template - primer complexes in the presence of low concentrations of deoxynucleoside triphosphates consists of several discrete size classes, none of which exceed 200 nucleotides in length; (ii) large DNA transcripts (about 2,000 nucleotides) can be synthesized on both 70S RNA and the 35S RNA - tRNAtrp complex by increasing the deoxynucleoside triphosphate concentration; and (iii) DNA synthesized by detergent-disrupted virus is considerably longer than DNA synthesized in reconstructed reactions.

摘要

我们分析了在含有纯化禽肿瘤病毒基因组RNA和RNA指导的DNA聚合酶的体外重建反应中合成的DNA产物。这些研究结果表明:(i)在低浓度脱氧核苷三磷酸存在下,在70S RNA或重组的35S RNA-色氨酸转运RNA模板-引物复合物上合成的初始DNA产物由几个离散的大小类别组成,其长度均不超过200个核苷酸;(ii)通过增加脱氧核苷三磷酸浓度,可以在70S RNA和35S RNA-色氨酸转运RNA复合物上合成大的DNA转录本(约2000个核苷酸);(iii)由去污剂破坏的病毒合成的DNA比在重建反应中合成的DNA长得多。

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