嗜热四膜虫和蚜虫5.8S rRNA的一级和二级结构：与含有隐藏断裂的28S rRNA相互作用的5.8S rRNA的结构特征

Primary and secondary structures of Tetrahymena and aphid 5.8S rRNAs: structural features of 5.8S rRNA which interacts with the 28S rRNA containing the hidden break.

作者信息

Fujiwara H, Ishikawa H

出版信息

Nucleic Acids Res. 1982 Sep 11;10(17):5173-82. doi: 10.1093/nar/10.17.5173.

DOI:10.1093/nar/10.17.5173

PMID:6815618

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC320863/

Abstract

The Tetrahymena 5.8S rRNA is 154 nucleotides long, the shortest so far reported except for the split 5.8S rRNAs of Diptera (m5.8S plus 2S rRNA). In this molecule several nucleotides are deleted in the helix e (GC-rich stem) region. Upon constructing the secondary structure in accordance with "burp-gun" model, the Tetrahymena 5.8S rRNA forms a wide-open "muzzle" of the terminal regions due to both extra nucleotides and several unpaired bases. The aphid 5.8S rRNA consists of 161 nucleotides and can form stable helices in both terminal and helix e regions. As a whole, the secondary structure of Tetrahymena 5.8S rRNA resembles that of Bombyx 5.8S molecule while the aphid 5.8S rRNA shares several structural features with the HeLa 5.8S molecule. Likely, the 5.8S rRNA attached to the 28S rRNA with the hidden break differs in structure from those interacting with the 28S partners without the break. Nucleotide sequences of 5.8S rRNA in insects as well as in protozoans are not so conservative evolutionarily as in vertebrates.

摘要

嗜热四膜虫的5.8S rRNA长154个核苷酸，是迄今为止报道的除双翅目（m5.8S加2S rRNA）的分裂5.8S rRNAs之外最短的。在这个分子中，螺旋e（富含GC的茎）区域有几个核苷酸缺失。根据“连发枪”模型构建二级结构时，嗜热四膜虫的5.8S rRNA由于额外的核苷酸和几个未配对碱基而在末端区域形成一个大开的“枪口”。蚜虫的5.8S rRNA由161个核苷酸组成，在末端和螺旋e区域都能形成稳定的螺旋。总体而言，嗜热四膜虫5.8S rRNA的二级结构类似于家蚕5.8S分子的二级结构，而蚜虫5.8S rRNA与海拉细胞5.8S分子具有一些共同的结构特征。可能，与带有隐藏断裂的28S rRNA相连的5.8S rRNA在结构上与那些与没有断裂的28S伙伴相互作用的5.8S rRNA不同。昆虫以及原生动物中5.8S rRNA的核苷酸序列在进化上不像脊椎动物中的那样保守。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5785/320863/675f32229959/nar00386-0078-a.jpg

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嗜热四膜虫和蚜虫5.8S rRNA的一级和二级结构：与含有隐藏断裂的28S rRNA相互作用的5.8S rRNA的结构特征

Primary and secondary structures of Tetrahymena and aphid 5.8S rRNAs: structural features of 5.8S rRNA which interacts with the 28S rRNA containing the hidden break.

作者信息

Fujiwara H, Ishikawa H

出版信息

Nucleic Acids Res. 1982 Sep 11;10(17):5173-82. doi: 10.1093/nar/10.17.5173.

DOI:10.1093/nar/10.17.5173

PMID:6815618

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC320863/

Abstract

摘要

嗜热四膜虫和蚜虫5.8S rRNA的一级和二级结构：与含有隐藏断裂的28S rRNA相互作用的5.8S rRNA的结构特征

Primary and secondary structures of Tetrahymena and aphid 5.8S rRNAs: structural features of 5.8S rRNA which interacts with the 28S rRNA containing the hidden break.

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嗜热四膜虫和蚜虫5.8S rRNA的一级和二级结构：与含有隐藏断裂的28S rRNA相互作用的5.8S rRNA的结构特征

Primary and secondary structures of Tetrahymena and aphid 5.8S rRNAs: structural features of 5.8S rRNA which interacts with the 28S rRNA containing the hidden break.

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