通过聚甲结合蛋白识别聚乙烯酸RNA
R C Deo1, J B Bonanno, N Sonenberg
1Laboratories of Molecular Biophysics, The Rockefeller University, New York, New York 10021, USA.
Cell
|September 28, 1999
概括
揭示了与mRNA结合的人类多A结合蛋白 (PABP) 的结构,显示了它如何识别多A尾部. 这一发现提供了对真核细胞翻译和mRNA稳定性的见解.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 生物化学 生物化学
背景情况:
- 聚A结合蛋白 (PABP) 对于真核生物的基因表达是必不可少的.
- PABP与3'mRNA多A尾结合,影响翻译和mRNA的稳定性.
- 了解PABP的结构是阐明其监管功能的关键.
研究的目的:
- 为了确定人类PABP及其RNA连接体的共晶结构.
- 为了阐明PABP与多A尾之间的分子相互作用.
- 为PABP在翻译和mRNA代谢中的作用提供结构基础.
主要方法:
- 在2.6A分辨率的X射线晶体学.
- 人类PABP (RRM1/2域) 与多乙烯酸RNA的联合结晶.
- 结构分析和分子建模.
主要成果:
- 该结构显示了由PABP的RRM1/2域形成的连续RNA结合谷.
- 聚乙烯酸RNA在结合低谷内采用扩展形态.
- 保守的RNP基因残留物和腺因基之间的特定接触介导RNA识别.
- 在PABP RRM1/2上保存的疏水/酸性表面表明与其他蛋白质的相互作用.
结论:
- 确定的结构提供了一个详细的分子机制,用于PABP的识别的多A尾.
- 这种结构洞察对于理解PABP在翻译启动和mRNA衰变中的作用至关重要.
- 保存的表面可能会调解与转化因子的相互作用,为监管研究提供目标.
相关概念视频
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Different Types of RNA Have the Same Basic Structure
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Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
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