An antibiotic-binding motif of an RNA fragment derived from the A-site-related region of Escherichia coli 16S rRNA.

An antibiotic-binding motif of an RNA fragment derived from the A-site-related region of Escherichia coli 16S rRNA.
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来自大肠杆菌 16S rRNA A 位点相关区域的 RNA 片段的抗生素结合基序。

DOI:
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发表时间:
1996
影响因子:
14.9
通讯作者:
S. Yokoyama
S. Yokoyama
中科院分区:
生物学2区
文献类型:
--
作者:
H. Miyaguchi;H. Narita;K. Sakamoto;S. Yokoyama

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来源于大肠杆菌16 S rRNA的解码区的小RNA可以结合作用于小核糖体亚基的氨基糖苷类抗生素(新霉素和巴龙霉素)[Purohit,P.和Stern,S.等(1994)Nature,370,659-662]。在本研究中,从该解码区RNA中去除P-位点亚结构域,构建27聚体RNA(命名为ASR-27),其包括16 S rRNA的A-位点相关区域(位置1402-1412和1488-1497)。用硫酸二甲酯作为化学探针的足迹实验表明,ASR-27 RNA可以以与解码区RNA相同的方式与新霉素家族相互作用。ASR-27 RNA的诱变分析显示,ASR-27的巴龙霉素结合涉及C1407. G1494和C1409-G1491碱基对,以及包含A1408和位于两个C.G碱基对之间的位置1492-1493处的核苷酸的内环。此外,还涉及位置1495处的G或U以及位置1405和1496之间的碱基配对。这些结构特征是在病毒RNA元件中发现的,即人类免疫缺陷病毒1型的Rev结合位点,这可能解释了为什么新霉素可以与这种病毒RNA结合。
A small RNA derived from the decoding region of Escherichia coli 16S rRNA can bind to antibiotics of aminoglycosides (neomycin and paromomycin) that act on the small ribosomal subunit [Purohit,P. and Stern,S. (1994) Nature, 370, 659-662]. In the present study, the P-site subdomain was removed from this decoding region RNA to construct a 27mer RNA (designated as ASR-27), which includes the A-site-related region (positions 1402-1412 and 1488-1497) of 16S rRNA. Footprint experiments with dimethyl sulfate as a chemical probe indicated that the ASR-27 RNA can interact with the neomycin family in the same manner as the decoding region RNA. A mutagenesis analysis of the ASR-27 RNA revealed that paromomycin binding of ASR-27 involves the C1407.G1494 and C1409-G1491 base pairs, and the internal loop comprising A1408 and the nucleotides in positions 1492-1493, located between the two C.G base pairs. In addition, a G or U in position 1495, and base pairing between positions 1405 and 1496 are also involved. These structural features were found in a viral RNA element, the Rev-binding site of human immunodeficiency virus type-1, which may explain why neomycin can bind to this viral RNA.
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DOI: --
发表时间: 1982
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DOI: --
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影响因子: --
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影响因子: 14.9
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