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多波长反常散射法解析Sau3AI蛋白C端结构域晶体结构
Structural determination of C-terminal domain of Sau3AI protein by multi-wavelength anomalous dispersion method
【摘要】 用同步辐射装置收集了Sau3AI的C端蛋白晶体在Se吸收边附近三个波长下的衍射数据,通过多波长反常散射(Multi-wavelength Anomalous Dispersion,MAD)法解决了晶体的衍射相位问题,解析了Sau3AI的C端蛋白的结构。结果表明,Sau3AI-C的结构与DNA错配修复蛋白MutH相似,结构中间的凹槽是Sau3AI-C与DNA的潜在结合区域。
【Abstract】 The Multi-wavelength Anomalous Dispersion(MAD) method is an important method for three-dimensional structure determination of protein crystals.Diffraction datasets of the C-terminal fragment of Sau3AI crystal were collected at three different wavelengths.The structure of Sau3AI-C was solved by MAD method.It shows that this structure is similar to DNA mismatch repair protein MutH.Structural analysis indicates that the cleft in the middle of the structure is the potential binding site for DNA.
【关键词】 Sau3AI的C端结构域(Sau3AI-C);
多波长反常散射法;
晶体结构;
【Key words】 C-terminal domain of Sau3AI; Multi-wavelength anomalous dispersion; Crystal structure;
【Key words】 C-terminal domain of Sau3AI; Multi-wavelength anomalous dispersion; Crystal structure;
【基金】 国家自然科学基金(30600107,30670499,30500113);中国科学院创新项目资助
- 【文献出处】 核技术 ,Nuclear Techniques , 编辑部邮箱 ,2008年11期
- 【分类号】Q518.2
- 【下载频次】194