活体系统中的代谢学NMR光谱:最近的进展和未来的挑战
Yun Peng1, Zeting Zhang1, Lichun He1
1State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, China.
Analytical and bioanalytical chemistry
|January 19, 2024
概括
核磁共振 (NMR) 技术,包括细胞内核磁共振和体内磁共振光谱 (MRS),监测代谢过程. 超极化方法,如动态核极化 (DNP) 和对诱导极化 (PHIP) 增强了NMR对代谢研究的敏感性.
科学领域:
- 生物化学和分子生物学
- 生物物理学的生物物理.
背景情况:
- 代谢对健康和疾病至关重要,涉及复杂的分子通路.
- 核磁共振 (NMR) 技术对于研究代谢过程和代谢物流动至关重要.
- 目前的NMR方法在检测低丰度代谢物时面临敏感性限制.
研究的目的:
- 审查细胞内NMR,体内MRS和超极化技术在代谢研究中的应用.
- 突出这些基于NMR的方法在表征代谢物和蛋白质方面的能力.
- 讨论提高代谢监测的挑战和未来方向.
主要方法:
- 细胞内核磁共振用于实时的代谢物跟踪和近原生环境中的蛋白质动态.
- 在体内磁共振光谱 (MRS) 用于全身代谢监测和代谢物空间分布.
- 超极化技术,包括动态核极化 (DNP) 和对诱导极化 (PHIP),以提高NMR灵敏度.
主要成果:
- 细胞内核磁共振 (NMR) 描述了 prokaryotic 和 eukaryotic 细胞中的代谢物和蛋白质.
- 在体内,MRS可视化了生物体内的代谢物分布和蛋白质定位.
- 超极化方法显著提高信号检测,使得研究低丰度代谢物和实时代谢活动.
结论:
- 细胞内NMR,体内MRS和超极化是代谢研究的强大工具.
- 这些技术提供了对代谢途径,蛋白质功能和细胞过程的实时洞察.
- 通过超极化克服敏感性限制是推动代谢研究和了解健康和疾病的关键.
相关概念视频
01:25Applications Of NMR In Biology
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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.
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01:07Nuclear Magnetic Resonance (NMR): Overview
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Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
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01:20NMR Spectrometers: Overview
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NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
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01:12Two-Dimensional (2D) NMR: Overview
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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....
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