激光拉曼光谱证明真核生物5.8S RNA和原核生物5S RNA存在新的三叶草二级结构。
Laser Raman evidence for new cloverleaf secondary structures for eukaryotic 5.8S RNA and prokaryotic 5S RNA.
作者信息
Luoma G A, Marshall A G
出版信息
Proc Natl Acad Sci U S A. 1978 Oct;75(10):4901-5. doi: 10.1073/pnas.75.10.4901.
Abstract
Neither of the two previously proposed secondary structures for eukaryotic 5.8S RNA is consistent with the present laser Raman results. A new, highly stable "cloverleaf" secondary structure not only fits the Raman data but also accounts for previously determined enzymatic partial cleavage patterns, base sequence and pairing homologies, and G-C and A-U base pair numbers and ratios. The new cloverleaf model also conserves several structural features (constant loops, bulges, and stems) consistent with known 5.8S RNA functions. Finally, we propose a similar new cloverleaf secondary structure for Escherichia coli 5S RNA, consonant with many known properties of prokaryotic 5S RNA.
摘要
先前提出的真核生物5.8S RNA的两种二级结构均与目前的激光拉曼结果不一致。一种新的、高度稳定的“三叶草”二级结构不仅符合拉曼数据，还解释了先前确定的酶促部分切割模式、碱基序列和配对同源性，以及G-C和A-U碱基对的数量和比例。新的三叶草模型还保留了几个与已知5.8S RNA功能一致的结构特征（恒定环、凸起和茎）。最后，我们为大肠杆菌5S RNA提出了一种类似的新三叶草二级结构，这与原核生物5S RNA的许多已知特性相符。
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