测定蛋白质二次结构的光谱技术的比较
Andreas Schwaighofer1, Heinz Anderle1, Martin Lemmerer1
1Analytical Development, R&D Pharmaceutical Science, Baxalta Innovations GmbH (part of Takeda), Industriestraße 67, 1220 Vienna, Austria.
概括
这项研究比较了用于蛋白质二次结构分析的光谱方法. 使用PLS模型的红外 (IR) 和拉曼光谱学提供了对α螺旋和β叶结构的最佳估计.
科学领域:
- 生物技术是生物技术.
- 制药科学 制药科学
- 生物物理化学 生物物理化学
背景情况:
- 精确确定蛋白质二次结构对于生物技术和制药研究至关重要.
- 光谱技术为估计二次结构组成提供了快速方法.
研究的目的:
- 为了比较红外 (IR),拉曼,远紫外圆形二极化 (CD) 光谱和蛋白质二次结构确定极度度的有效性.
- 评估不同分析算法的性能,包括PLS和CONTINLL,结合这些光谱方法.
主要方法:
- 对具有已知的二次结构的17种模型蛋白质的分析.
- 使用红外,拉曼,远紫外CD光谱和极度测量获取光谱.
- 使用部分最小平方 (PLS) 分析和专用算法 (例如,CONTINLL) 评估光谱数据.
主要成果:
- 应用于IR和拉曼光谱的PLS模型为量化α螺旋和β片含量提供了最好的结果.
- 使用CONTINLL算法的远紫外CD光谱学显示了对alpha-helix和beta-sheet估计的良好性能.
- 极极度测试在分析α螺旋内容方面被证明是有效的.
结论:
- 在用PLS分析时,IR和拉曼光谱对于确定关键蛋白质二次结构 (alpha-helix和beta-sheet) 是非常有效的.
- 远紫外CD光谱为二次结构分析提供了一个可行的替代方案,特别是当与适当的算法相结合时.
- 极度测量是评估α螺旋内容的一个有用的技术.
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