首页> 美国卫生研究院文献>IUCrJ >Ligand pathways in neuroglobin revealed by low-temperature photodissociation and docking experiments
【2h】

Ligand pathways in neuroglobin revealed by low-temperature photodissociation and docking experiments

机译:低温光解离和对接实验揭示神经球蛋白中的配体途径

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

A combined biophysical approach was applied to map gas-docking sites within murine neuroglobin (Ngb), revealing snapshots of events that might govern activity and dynamics in this unique hexacoordinate globin, which is most likely to be involved in gas-sensing in the central nervous system and for which a precise mechanism of action remains to be elucidated. The application of UV–visible microspectroscopy in crystallo, solution X-ray absorption near-edge spectroscopy and X-ray diffraction experiments at 15–40 K provided the structural characterization of an Ngb photolytic intermediate by cryo-trapping and allowed direct observation of the relocation of carbon monoxide within the distal heme pocket after photodissociation. Moreover, X-ray diffraction at 100 K under a high pressure of dioxygen, a physiological ligand of Ngb, unravelled the existence of a storage site for O2 in Ngb which coincides with Xe-III, a previously described docking site for xenon or krypton. Notably, no other secondary sites were observed under our experimental conditions.
机译:一种组合的生物物理方法被用于绘制鼠神经球蛋白(Ngb)内的气体停靠位点,揭示了可能控制这种独特的六坐标球蛋白活动和动态的事件的快照,该事件最有可能参与中枢神经系统的气体传感系统,其精确的作用机理还有待阐明。紫外可见光谱在结晶,溶液X射线吸收近边缘光谱和X射线衍射实验中在15–40 K上的应用提供了Ngb光解中间体的低温捕获结构特征,并可以直接观察迁移光解离后在远端血红素袋内的一氧化碳此外,在高压下(Ngb的生理学配体)双氧在100 K下进行的X射线衍射揭示了Ngb中O2的存储位点的存在,该位点与Xe-III(先前描述的氙或k的对接位点)重合。值得注意的是,在我们的实验条件下没有观察到其他次要位点。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号