Local folding coupled to RNA binding in the yeast ribosomal protein L30.
Local folding coupled to RNA binding in the yeast ribosomal protein L30.
复制标题
酵母核糖体蛋白 L30 中的局部折叠与 RNA 结合相结合。
DOI:
10.1006/jmbi.1999.3044
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发表时间:
1999
期刊:
影响因子:
--
通讯作者:
Williamson,JR
中科院分区:
文献类型:
--
作者:
Mao,H;Williamson,JR
The ribosomal protein L30 from yeast Saccharomyces cerevisiae auto-regulates its own synthesis by binding to a structural element in both its pre-mRNA and its mRNA. The three-dimensional structures of L30 in the free (f L30) and the pre-mRNA bound (b L30) forms have been solved by nuclear magnetic resonance spectroscopy. Both protein structures contain four alternating α-helices and four β-strands segments and adopt an overall topology that is an αβα three-layer sandwich, representing a unique fold. Three loops on one end of the αβα sandwich have been mapped as the RNA binding site on the basis of structural comparison, chemical shift perturbation and the inter-molecular nuclear Overhauser effects to the RNA. The structural and dynamic comparison of f L30 and b L30 reveals that local dynamics may play an important role in the RNA binding. The fourth helix in b L30 is longer than in f L30, and is stabilized by RNA binding. The exposed hydrophobic surface that is buried upon RNA binding may provide the energy necessary to drive secondary structure formation, and may account for the increased stability of b L30.
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