脊柱1H,13C和15N为人类SERF2的化学转移分配
Bikash R Sahoo1,2, Vivekanandan Subramanian3, James C A Bardwell4,5
1Howard Hughes Medical Institute, Chevy Chase, MD-20815, USA. bsahoo@umich.edu.
Biomolecular NMR assignments
|March 11, 2024
概括
人类的小EDRK丰富因子蛋白SERF2驱动与神经退行性疾病相关的粉样蛋白形成. 这项研究为SERF2提供了关键的结构洞察力,揭示了它与α-Synuclein的相互作用以及在帕金森病的发病过程中的潜在作用.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 神经科学是一个神经科学.
背景情况:
- 人类的小EDRK丰富因子蛋白SERF2驱动粉样蛋白的形成,与阿尔茨海默氏症和帕金森病有关.
- 尽管如此,SERF2的结构,功能和核酸结合机制仍然不清楚.
- SERF2与错误折叠的蛋白质形成复合体,如阿尔法-同核素,这是帕金森病的标志.
研究的目的:
- 阐明人类SERF的结构和功能2.2.
- 为了确定SERF2和α-Synuclein之间的结合接口.
- 了解SERF2在蛋白质聚合和神经退行过程中的作用.
主要方法:
- 多维解决方案 核磁共振 (NMR) 光谱学用于化学转移分配.
- 用TALOS-N进行二次结构预测.
- 偏磁放松增强NMR分析用于近距离研究.
主要成果:
- 86%的人类SERF2骨干共振分配是使用NMR获得的.
- 二次结构预测揭示了短的N端螺旋和长的C端螺旋 (残留物37-46).
- 核磁共振分析表明C端区域 (E53-K55) 与N端之间的接近,并确定了参与α-Synuclein结合的SERF2残留物.
结论:
- 该研究为人类SERF2提供了第一个骨干化学转移分配,使得进一步的结构和功能研究成为可能.
- SERF2具有独特的螺旋结构和分子内接近性.
- 已识别的SERF2结合接口提供了关于其促进α-Synuclein聚合和帕金森病潜在治疗点的作用的见解.
相关概念视频
NMR Spectroscopy: Chemical Shift Overview
1.5K
The position of the absorption signal of a sample is reported relative to the position of the signal of tetramethylsilane (TMS), which is added as an internal reference while recording spectra. The difference between the absorption frequencies of the sample and TMS (in Hz) is divided by the spectrometer operating frequency (in MHz) to obtain a dimensionless quantity called the chemical shift. It is reported on the δ (delta) scale and expressed in parts per million.
For instance, the proton...
For instance, the proton...
1.5K
Proton (¹H) NMR: Chemical Shift
1.6K
Organic molecules primarily contain carbon and hydrogen atoms. While all the hydrogen isotopes are NMR-active, protium or hydrogen-1 is the most abundant. It has a significant energy separation between its nuclear spin states due to its large gyromagnetic ratio. As per Boltzmann's distribution, an increase in the energy separation implies a greater excess population of nuclei available for excitation, resulting in a strong NMR absorption signal.
Absorption signals of all the protium nuclei...
Absorption signals of all the protium nuclei...
1.6K
Other Nuclides: 31P, 19F, 15N NMR
383
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...
383
¹H NMR Chemical Shift Equivalence: Homotopic and Heterotopic Protons
2.4K
Protons in identical electronic environments within a molecule are chemically equivalent and have the same chemical shift. The replacement test is a useful tool to identify chemical equivalence and predict NMR spectra. A substituent replaces each of the protons being examined and the resulting molecules are compared. If the same molecule is obtained, the protons are equivalent or homotopic. Replacement of any hydrogens in ethane by chlorine yields chloroethane because all six protons are...
2.4K
Carbon-13 (¹³C) NMR: Overview
5.7K
Carbon-13 is a naturally occurring NMR-active isotope of carbon with a low natural abundance of 1.1%. In contrast, carbon-12 is the most abundant isotope of carbon with zero nuclear spin. Therefore, it is NMR inactive. The gyromagnetic ratio of carbon-13 is smaller than that of protons. As a result, carbon-13 resonance is about 6000 times weaker than proton resonance. For a given magnetic field strength, the resonance frequency of carbon-13 is about one-fourth of the resonance frequency for...
5.7K
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
707
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
707


