Folding of circularly permuted transfer RNAs.

Folding of circularly permuted transfer RNAs.
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循环排列转移 RNA 的折叠。

DOI:
10.1126/science.1720569
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发表时间:
1991
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Uhlenbeck,OC
Uhlenbeck,OC
中科院分区:
--
文献类型:
--
作者:
Pan,T;Gutell,RR;Uhlenbeck,OC

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在一次实验中已经确定了酵母tRNAP中所有可以在不影响分子折叠的情况下被切割的核糖-磷酸键。环状排列分析使环状tRNA分子受到有限的碱水解,以便每个分子产生一个随机断裂。正确折叠的tRNAs是通过在中性pH下的铅裂解来鉴定的,这是一个需要tRNAPhe适当折叠的很好的反应。令人惊讶的是,大多数环形排列的tRNA分子都正确折叠。这一结果表明,tRNA折叠基序可能发生在其他RNA序列的内部,计算机对Genbank条目的搜索已经确定了许多这样的基序的例子。
All of the ribose-phosphate linkages in yeast tRNAPhethat could be cleaved without affecting the folding of the molecule have been determined in a single experiment. Circular permutation analysis subjects circular tRNA molecules to limited alkaline hydrolysis in order to generate one random break per molecule. Correctly folded tRNAs were identified by lead cleavage at neutral pH, a well-characterized reaction that requires proper folding of tRNAPhe. Surprisingly, most of the circularly permuted tRNA molecules folded correctly. This result suggests that the tRNA folding motif could occur internally within other RNA sequences, and a computer search of Genbank entries has identified many examples of such motifs.
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