从cis-proline中获取β-片的甘氨酸救援
1Bioinformatics Centre, Bose Institute, P-1/12 CIT Scheme VIIM, Kolkata 700054, India.
Journal of the American Chemical Society
|September 20, 2012
概括
甘氨酸拯救了由cis-proline引起的β-片结构扭曲. 这种甘氨酸残留物 (Gly(β(PR))) 采用了聚烯构造,保持了蛋白质的结构和功能.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 蛋白质折叠 蛋白质的折叠
背景情况:
- 氨酸残留物破坏了理想的β-叶形状,特别是在cis形状中.
- 这种干扰可以导致严重的蛋白质结构扭曲.
研究的目的:
- 研究甘氨酸在减轻cis-Proline引起的β-sheet扭曲中的作用.
- 描述甘氨酸-cis-proline相互作用的结构和功能影响.
主要方法:
- 对蛋白质序列和结构的分析,以在前cisPro位置确定甘氨酸.
- 结构建模以了解由甘氨酸 (β(PR)) 采用的构造.
主要成果:
- 在β表中,甘氨酸在cis-Proline之前的位置具有很高的倾向.
- 甘氨酸采用右侧聚烯 (β(PR)) 形状,挽救β-sheet的完整性.
- 由此产生的Gly(β(PR)) -cisPro残留物在进化过程中得到保存,并且具有功能意义.
结论:
- 在cis-Proline的存在下,甘氨酸在维持β-片稳定性方面发挥着至关重要的作用.
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