GAT1突变的计算分析:分子动力学和结合性自由能量计算的功能后果
Muhammad Yasir1, Jinyoung Park1, Eun-Taek Han2
1Department of Pharmacology, Kangwon National University School of Medicine, Chuncheon 24341, Republic of Korea.
International journal of molecular sciences
|December 11, 2025
概括
在GABA载体1 (GAT1) 突变影响抑制神经传递. 计算分析揭示了特定突变如何破坏GAT1的稳定,影响其功能,并可能导致神经系统疾病.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 计算化学的计算化学
背景情况:
- GABA载体1 (GAT1) 对于通过GABA再吸收来抑制神经传递至关重要.
- GAT1功能障碍与和阿尔茨海默病等神经系统疾病有关.
- 了解GAT1突变是阐明GABAergic系统功能障碍的关键.
研究的目的:
- 通过计算来研究报告的GAT1突变的结构和功能后果.
- 分析突变对GAT1稳定性,联体结合和结合网络的影响.
- 为治疗开发提供关于GAT1功能障碍的机制性见解.
主要方法:
- 对GAT1变异的同质模型和结构验证.
- 分子动力学 (MD) 模拟来评估蛋白质的稳定性和动力学.
- 使用gmx_MMPBSA方法来量化连接体相互作用的有约束力的自由能量计算.
主要成果:
- 野生型GAT1显示出最有利的相互作用和结合的自由能量.
- 突变导致了局部形状变化,保留了整体GAT1结构.
- 特定突变 (Y140C,G457H,Q291Δ,D451G,N310I) 显著降低了蛋白质-连接体稳定性和增加了连接体移动性.
结论:
- GAT1突变可以改变传送器的稳定性和功能,影响GABAergic神经递送.
- 计算方法为突变诱导的GAT1功能障碍提供了宝贵的见解.
- 这些发现为未来关于GABAergic疾病和药物开发的研究提供了结构性基础.
更多相关视频
10:29Quantitative Structure-Activity Relationship, Activity Prediction, and Molecular Dynamics of Non-nucleotide Reverse Transcriptase Inhibitors
Published on: May 9, 2025
2.1K
05:56Exploring Caspase Mutations and Post-Translational Modification by Molecular Modeling Approaches
Published on: October 13, 2022
1.7K
相关概念视频
Conserved Binding Sites
5.0K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
5.0K
Ligand Binding and Linkage
5.4K
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
5.4K
The Equilibrium Binding Constant and Binding Strength
14.8K
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
14.8K
Allosteric Proteins-ATCase
6.4K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
6.4K
Covalently Linked Protein Regulators
8.6K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
8.6K
GTPases and their Regulation
9.7K
Guanine nucleotide-binding proteins (G-proteins), also known as GTPases, are a superfamily of proteins that regulate many cellular processes, such as cell signaling, vesicular transport, and the regulation of cell shape and motility. Mutation or dysfunction of these proteins can lead to disease. There are around 40,000 known G-proteins that can broadly be classified into two groups ‒ small G-proteins consisting of a single domain and large multi-domain G-proteins.
Large G-proteins,...
Large G-proteins,...
9.7K
