细胞内口袋形状通过阿片类受体决定了通过阿片类受体的信号有效性
David A Cooper1, Joseph DePaolo-Boisvert1, Stanley A Nicholson2
1Department of Chemistry, Illinois Institute of Technology, Chicago, Illinois 60616, United States.
bioRxiv : the preprint server for biology
|December 16, 2024
概括
由于功能选择性,难以预测受体信号强度. 这项研究表明,一个机器学习模型通过分析受体-连接体复合体构造来准确计算G蛋白和阿雷斯通路的信号效率.
科学领域:
- 药理学和分子生物学
- 计算化学和化学信息学
背景情况:
- 确定连接体如何激活下游信号通路,并预测信号强度是具有挑战性的.
- 功能选择性,其中一个联体受体对激活多个通路,使预测变得复杂.
- 7个跨膜受体 (7TMRs) 的激活涉及细胞内口袋中的联体诱导的构造变化.
研究的目的:
- 测试通过mu阿片类受体传递信号与细胞内口袋构成概率成比例的假设.
- 开发一种机器学习模型,用于准确计算信号效率.
- 识别与受体激活和功能选择性相关的结构特征.
主要方法:
- 开发了一种基于信号和细胞内口袋形状概率之间的线性比例假设的机器学习模型.
- 利用了受体-连接体复合体的光谱数据.
- 验证了模型在计算G蛋白和β-arrestin-2信号效能的准确性.
主要成果:
- 机器学习模型准确地预测了G蛋白和β-arrestin-2通路的信号有效性.
- 与激活相关的关键结构特征包括细胞内口袋扩张,切换开关旋转和结合口袋崩.
- 截然不同的路径激活与连接体/结合口袋和细胞内口袋的特殊安排有关.
结论:
- 7TMRs的信号效率可以使用基于构造概率的机器学习方法准确计算.
- 这种方法超越了简单的活性/无活性联体物分类,提供了对多路径信号的定量预测.
- 了解结构特征的相互作用,可以了解连接体诱导的功能选择性.
相关概念视频
Opioid Receptors: Overview
510
Opioid receptors, including the mu (μ, MOR), delta (δ, DOR), and kappa (κ, KOR) types, belong to the rhodopsin family of G protein-coupled receptors. These receptors are located throughout the central and peripheral nervous systems and in non-neuronal tissues such as macrophages and astrocytes. Opioid receptor ligands can be categorized into agonists or antagonists. Highly selective agonists include [d-Ala2, MePhe4, Gly(ol)5]-enkephalin or DAMGO for MOR, [D-Pen2,...
510
The Two-State Receptor Model
1.9K
The two-state receptor model explains a drug's interaction with receptors, such as G protein-coupled receptors and ligand-gated ion channels, to induce or inhibit a biological response. When no natural ligands are present, a receptor exists in an equilibrium of inactive (Ri) and active (Ra) conformations. The inactive form does not produce a response, while the active form generates a basal effect known as constitutive activity.
The binding affinity of a drug determines its interaction with...
The binding affinity of a drug determines its interaction with...
1.9K
Assembly of Signaling Complexes
5.7K
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
5.7K
Drug-Receptor Interactions
4.9K
Drug-receptor interaction describes the binding of receptors by drugs, but not all drug-receptor interactions result in activation and tissue response. For instance, the binding of agonists activates the receptor to generate a cellular reaction, while antagonists bind to receptors without causing their activation.
Several parameters, such as the drug's affinity for its receptor and its efficacy, which is its ability to activate the receptor, determine the drug's effect on the tissue....
Several parameters, such as the drug's affinity for its receptor and its efficacy, which is its ability to activate the receptor, determine the drug's effect on the tissue....
4.9K
Cell-surface Signaling
51.4K
Hormones—or any molecule that binds to a receptor, known as a ligand—that are lipid-insoluble (water-soluble) are not able to diffuse across the cell membrane. In order to be able to affect a cell without entering it, these hormones bind to receptors on the cell membrane. When a first messenger, a hormone, binds to a receptor, a signal cascade is set off, causing second messengers, proteins inside the cell, to become activated, resulting in downstream effects.
51.4K
Types of Receptors: Internal Receptors
22.4K
Many cellular signals are hydrophilic and cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind intracellular receptors that reside within the cell cytoplasm or nucleus. Many mammalian steroid hormones and nitric oxide (NO) gas use this cell signaling mechanism.
Similar to membrane-bound receptors, the binding of a ligand to the intracellular receptor of causes a conformational change in the...
Similar to membrane-bound receptors, the binding of a ligand to the intracellular receptor of causes a conformational change in the...
22.4K


