通过NMR的镜头构建GPCR故事
Arpita Prasad1, Zofishan Iqra Anjum1, Ashutosh Kumar1
1Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India.
Magnetic resonance in chemistry : MRC
|August 26, 2025
概括
核磁共振 (NMR) 技术为G蛋白合受体 (GPCRs) 提供了先进的洞察力,揭示了它们在活细胞中的结构,配体相互作用和功能的细节.
科学领域:
- 生物化学和分子生物学
- 结构生物学
- 药理学
背景情况:
- G蛋白结合受体 (GPCR) 是一个广泛而多样化的细胞膜受体,对许多生理过程至关重要.
- GPCRs是细胞反应的关键调节剂,是药物开发的重要目标.
- 虽然GPCR结构,动态和功能的许多方面得到了广泛的研究,但仍然不完全理解.
研究的目的:
- 审查各种核磁共振 (NMR) 方法用于研究GPCR.
- 强调先进的NMR方法如何提供GPCR的详细见解.
- 探索NMR在理解受体偏差,配体选择性和结合特性方面的潜力.
主要方法:
- 使用各种生物物理技术,包括X射线结晶学,冷电子显微镜 (冷EM) 和核磁共振 (NMR).
- 专注于NMR方法的最新发展和具体应用.
- 在配体相互作用和形态动态的背景下研究GPCR.
主要成果:
- 像X射线结晶学和冷EM这样的传统技术已经为GPCR结构提供了基本的理解.
- 最近的NMR方法的进步使GPCRs的详细表征成为可能,包括连体结合和形态动态.
- 在活细胞中研究GPCR,提供对其功能状态的洞察力.
结论:
- 核磁共振技术是阐明GPCR结构和功能的复杂细节的强大工具.
- 先进的NMR方法显著提高了我们对GPCRs的理解,超出了传统的结构生物学方法.
- 这一审查强调了NMR在推进GPCR研究和药物发现方面的关键作用.
相关概念视频
NMR Spectrometers: Overview
1.3K
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...
1.3K
GPCRs Regulate Adenylyl Cylase Activity
5.9K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
5.9K
Nuclear Magnetic Resonance (NMR): Overview
3.2K
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...
3.2K
Applications Of NMR In Biology
3.9K
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.
3.9K
G Protein-coupled Receptors
13.3K
G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
13.3K
NMR Spectroscopy of Aromatic Compounds
5.0K
Aromatic compounds can be identified or analyzed using proton NMR and carbon‐13 NMR. Typically, aromatic hydrogens or hydrogens directly bonded to the aromatic rings are strongly deshielded by the aromatic ring current. Therefore, they absorb in the range of 6.5–8.0 ppm in proton NMR spectra. For instance, aromatic hydrogens directly bonded to the benzene ring absorb at 7.3 ppm. However, aromatic hydrogens of larger rings absorb farther upfield or downfield than the ideal range.
5.0K


