从垂直三合体的强有力的贡献到螺旋合作伙伴偏好在平行线圈线圈线圈
Jay D Steinkruger1, Gail J Bartlett, Derek N Woolfson
1Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.
Journal of the American Chemical Society
|September 15, 2012
概括
垂直相互作用显著影响并行卷轴-卷轴二极管配对的特异性. 这就是D-A-D三位一体.
科学领域:
- 蛋白质结构和生物物理学
- 分子生物学分子生物学
- 生物信息学是一种生物信息学.
背景情况:
- 卷状卷状蛋白质结构在螺旋-螺旋接口的特定侧链相互作用中得到稳定.
- 这是一个很棒的节目,这是一个很棒的节目.
- 按进入洞的子
- (KIH) 的时间.
- 包装模型描述了卷轴中的残留物相互作用.
- 了解残留物标识如何影响二聚体稳定性和特异性至关重要.
研究的目的:
- 为了研究垂直相互作用的作用,特别是d"-a-d"三元体,并行卷轴-卷轴二元体配对.
- 为了确定这些垂直相互作用是否影响平行二维的配对特异性.
- 在确定配对偏好时,探索垂直和横向相互作用之间的相互作用.
主要方法:
- 使用模型系统对卷轴-卷轴二极管稳定性和配对偏好进行实验分析.
- 蛋白序列的生物信息分析,以确定残留物组成的趋势.
- 基于结构的分析,以将界面残留物标识与观察到的配对趋势相关联.
主要成果:
- 垂直相互作用,特别是d"-a-d"三角形,显著影响并行卷轴-卷轴二度体中的配对特异性.
- "d"-a-d"三角形的影响取决于KIH图案中相邻的侧面a'接触的性质.
- 生物信息数据支持实验发现,表明人们更喜欢异构三体 (Leu/Ile) 而不是同构三体 (Leu/Ile).
结论:
- 垂直相互作用在平行线圈-线圈二极管中确定配对特异性方面发挥着重要作用.
- "d"-a-d"三位一体的影响是取决于上下文的,通过侧面相互作用来调节.
- 在特定的三合体安排中,Leu和Ile残留物的优先配对得到了实验和生物信息学证据的支持.
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