利用比萨饼图解决来自对齐蛋白质的PISEMA光谱中角度限制的模糊性问题。
Using pisa pies to resolve ambiguities in angular constraints from PISEMA spectra of aligned proteins.
作者信息
Marassi Francesca M, Opella Stanley J
出版信息
J Biomol NMR. 2002 Jul;23(3):239-42. doi: 10.1023/a:1019887612018.
Abstract
The structures of proteins are mapped onto the patterns of resonances in NMR spectra of aligned samples. This is most clearly illustrated with Pisa wheels of helical membrane proteins, where the distinctive 'wheel-like' patterns of resonances reflect the tilt and rotation of the helices in the bilayers. These patterns contain both structural and assignment information. This Communication describes a simple way of using this information to resolve angular ambiguities inherent in orientational constraints derived from NMR data. This contributes to the use of solid-state NMR of aligned samples for protein structure determination.
摘要
蛋白质的结构被映射到定向样品核磁共振谱中的共振模式上。这在螺旋膜蛋白的比萨轮图中体现得最为明显，其中独特的“轮状”共振模式反映了双层膜中螺旋的倾斜和旋转。这些模式包含结构和归属信息。本通讯描述了一种利用此信息解决核磁共振数据导出的取向约束中固有的角度模糊性的简单方法。这有助于将定向样品的固态核磁共振用于蛋白质结构测定。
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