基于F旋转-旋转放松时间的NMR查方法,用于分析与蛋白质结合的化化合物
Kazuo Furihata1, Mitsuru Tashiro2
1Division of Agriculture and Agricultural Life Sciences, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
概括
使用旋转-旋转放松时间 (19F-T2) 的-19核磁共振查有效监测化化合物与蛋白质的结合. 这种方法在评估复杂形成时,比自旋格子放松时间 (19F-T1) 更为敏感.
科学领域:
- 分析化学 分析化学
- 生物化学 生化学
- 核磁共振光谱学 核磁共振光谱学
背景情况:
- 化化合物在制药和材料科学中至关重要.
- 了解蛋白质 - 配体相互作用对于药物发现至关重要.
- 核磁共振 (NMR) 提供了强大的分析能力.
研究的目的:
- 为了评估-19核磁共振放松时间的实用性,以评估化化合物的与人血清白蛋白的结合.
- 为了比较19F旋转-旋转放松时间 (19F-T2) 和19F旋转放松时间 (19F-T1) 在监测结合亲和度的灵敏度.
- 建立19F核磁共振作为化化合物-蛋白质复合体形成的有效选方法.
主要方法:
- 使用19F旋转-旋转放松时间 (19F-T2) 的19F核磁共振查技术的应用.
- 作为模型化化合物,利用了二素和多素.
- 分析了19F信号强度在不同的回声时间使用19F-T2脉冲序列.
主要成果:
- 19F-T2被证明比19F-T1更敏感,用于监测与人血清白蛋白的结合亲和力.
- 在不同的回声时间对19F信号强度进行比较,有效地评估了复杂的形成.
- 这项研究证实了二氨酸和多氨酸适用于19F NMR分析的适用性.
结论:
- 19F-T2 NMR放松时间是一种敏感且有效的方法,用于评估化化合物与蛋白质的结合亲和力.
- 在不同回声时间的19F核磁共振信号强度分析提供了一个强大的方法来评估复杂的形成.
- 这种基于NMR的查策略为药物发现和开发提供了宝贵的工具.
相关概念视频
Atomic Nuclei: Types of Nuclear Relaxation
322
Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
322
Other Nuclides: 31P, 19F, 15N NMR
396
Many organic, inorganic, and biological molecules contain spin-half nuclei such as nitrogen-15, fluorine-19, and phosphorus-31. As a result, NMR studies of these nuclei have found extensive applications in chemical and biological research.
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
396
Applications Of NMR In Biology
3.7K
Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
3.7K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
818
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
818
Two-Dimensional (2D) NMR: Overview
698
The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
698
Double Resonance Techniques: Overview
233
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
233


