通过部分序列分析揭示的蕈状支原体tRNA的非常规密码子阅读。
Unconventional codon reading by Mycoplasma mycoides tRNAs as revealed by partial sequence analysis.
作者信息
Guindy Y S, Samuelsson T, Johansen T I
机构信息
Department of Medical Biochemistry, University of Göteborg, Sweden.
出版信息
Biochem J. 1989 Mar 15;258(3):869-73. doi: 10.1042/bj2580869.
Abstract
Continuing our investigation of the tRNA genes and gene products in Mycoplasma mycoides, we report the sequence of the gene for tRNALeu (CAA) as well as partial primary structures of the following tRNAs: Leu (CAA), Leu (UAG), Arg (UCU), Thr (AGU) and Ile (CAU). It is suggested that in M. mycoides, at least some of the family codon boxes are read by only one tRNA each, using an unconventional method which does not discriminate between the nucleotides in the third codon position. M. mycoides is the first free-living organism known to use an unconventional method of this kind.
摘要
在继续对蕈状支原体中的tRNA基因及其基因产物进行研究的过程中，我们报告了tRNALeu（CAA）基因的序列以及以下tRNA的部分一级结构：Leu（CAA）、Leu（UAG）、Arg（UCU）、Thr（AGU）和Ile（CAU）。有人提出，在蕈状支原体中，至少某些密码子家族框仅由一种tRNA读取，采用的是一种非常规方法，该方法不区分密码子第三位的核苷酸。蕈状支原体是已知的首个使用这种非常规方法的自由生活生物。
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