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大豆18S rRNA核苷酸序列与其他小亚基rRNA序列的比较。

Comparison of the nucleotide sequence of soybean 18S rRNA with the sequences of other small-subunit rRNAs.

作者信息

Eckenrode V K, Arnold J, Meagher R B

出版信息

J Mol Evol. 1984;21(3):259-69. doi: 10.1007/BF02102358.

DOI:10.1007/BF02102358
PMID:6100313
Abstract

We present the sequence of the nuclear-encoded ribosomal small-subunit RNA from soybean. The soybean 18S rRNA sequence of 1807 nucleotides (nt) is contained in a gene family of approximately 800 closely related members per haploid genome. This sequence is compared with the ribosomal small-subunit RNAs of maize (1805 nt), yeast (1789 nt), Xenopus (1825 nt), rat (1869 nt), and Escherichia coli (1541 nt). Significant sequence homology is observed among the eukaryotic small-subunit rRNAs examined, and some sequence homology is observed between eukaryotic and prokaryotic small-subunit rRNAs. Conserved regions are found to be interspersed among highly diverged sequences. The significance of these comparisons is evaluated using computer simulation of a random sequence model. A tentative model of the secondary structure of soybean 18S rRNA is presented and discussed in the context of the functions of the various conserved regions within the sequence. On the basis of this model, the short base-paired sequences defining the four structural and functional domains of all 18S rRNAs are seen to be well conserved. The potential roles of other conserved soybean 18S rRNA sequences in protein synthesis are discussed.

摘要

我们展示了大豆核编码核糖体小亚基RNA的序列。大豆18S rRNA序列由1807个核苷酸（nt）组成，存在于每个单倍体基因组中约800个密切相关成员的基因家族中。该序列与玉米（1805 nt）、酵母（1789 nt）、非洲爪蟾（1825 nt）、大鼠（1869 nt）和大肠杆菌（1541 nt）的核糖体小亚基RNA进行了比较。在所检测的真核小亚基rRNA之间观察到显著的序列同源性，并且在真核和原核小亚基rRNA之间也观察到一些序列同源性。发现保守区域散布在高度分化的序列之中。使用随机序列模型的计算机模拟来评估这些比较的意义。提出了大豆18S rRNA二级结构的初步模型，并结合序列中各个保守区域的功能进行了讨论。基于该模型，可发现定义所有18S rRNA四个结构和功能域的短碱基配对序列高度保守。还讨论了大豆18S rRNA其他保守序列在蛋白质合成中的潜在作用。

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本文引用的文献

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Planta. 1979 Sep;146(4):467-73. doi: 10.1007/BF00380862.
2
Ribosomal RNA synthesis in soybean suspension cultures growing in different media.在不同培养基中生长的大豆悬浮培养物中的核糖体 RNA 合成。
Plant Physiol. 1982 Jan;69(1):234-9. doi: 10.1104/pp.69.1.234.
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Complete nucleotide sequence of a soybean actin gene.大豆肌动蛋白基因的完整核苷酸序列。
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Planta. 1988 Nov;176(1):51-9. doi: 10.1007/BF00392479.
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Planta. 1990 Mar;180(4):548-54. doi: 10.1007/BF02411453.
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