通过体水相互作用与部位在μOR中介导的信号调制
Rohini S Ople1,2, Nokomis Ramos-Gonzalez1,2, Qiongyu Li3
1Center for Clinical Pharmacology, University of Health Sciences & Pharmacy at St. Louis and Washington University School of Medicine, St. Louis, Missouri 63110, United States.
ACS central science
|September 2, 2024
概括
研究人员开发了RO76,一种新型止痛药,通过水分子向mu阿片类受体 (μOR) 部位. 与吗啡相比,这种方法提供了改善的全身活性和减少副作用.
科学领域:
- 药理学 药理学是指药理学的学科.
- 神经科学是一个神经科学.
- 结构生物学 结构生物学
背景情况:
- 类阿片受体 (μOR) 激动剂是关键的止痛药,但会引起不良影响.
- 开发更安全的止痛药需要针对替代站点或机制.
- 之前的工作确定了C6guano,一种向μOR位点的配体.
研究的目的:
- 设计一种新型的,具有系统活性的μOR联结体,具有更好的安全性.
- 调查通过水分子间接准μOR位.
- 为了探索G蛋白结合受体的水介导的全调制.
主要方法:
- 基于结构的药物设计和冷电子显微镜 (cryo-EM) 来确定RO76-μOR复杂结构.
- 细胞信号测试和基于APEX的近距离标签,以评估受体调节.
- 在小鼠模型中进行的体内疗效和安全性研究 (尾部撤回试验).
主要成果:
- 一个新的配体,RO76,是通过用醇取代C6guano的链接器和guanidine组来设计的.
- 低温EM显示,RO76通过部位的水分子间接地与μOR结合.
- 与吗啡相比,RO76在小鼠中表现出系统性止痛活性,其负担能力较低.
结论:
- 向阿片类受体囊中的水分子是调制信号传输的可行策略.
- 这种以水为媒介的全调节可能会导致更安全的止痛药.
- 这种方法可能适用于其他具有保存结合位的G蛋白结合受体.
相关概念视频
Calmodulin-dependent Signaling
5.1K
Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
5.1K
Ligand Binding Sites
12.8K
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
12.8K
Types of Signaling Molecules
10.2K
In multicellular organisms, many molecules transmit signals between cells to pass information. These signals vary in complexity and include small peptides, nucleotides, steroids, fatty acid derivatives, and dissolved gases such as nitric oxide. Some signaling molecules diffuse through the plasma membrane to act locally between neighboring cells or travel long distances. Others remain attached to the cell surface, transmitting information to other cells only when they make contact. In some...
10.2K
Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.2K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
2.2K
Signal Transduction: Overview
8.3K
Cells respond to many types of information, often through receptor proteins positioned on the membrane. They respond to chemical signals, such as hormones, neurotransmitters, and other signaling molecules, initiating a series of molecular reactions to produce an appropriate response. This is called signal transduction. Cells also coordinate different responses elicited by the same signaling molecule via mediators, allowing molecular cross-talk.
Typically, signal transduction involves three...
Typically, signal transduction involves three...
8.3K
Amplifying Signals via Enzymatic Cascade
8.4K
When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
8.4K


