基于网络的加勒-7的全性分析:关键残留物决定了功能通信和稳定性
N T Hang Pham1, Alex Paré1, Myriam Létourneau1
1Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique (INRS), Université du Québec, Laval, Québec, Canada.
Protein science : a publication of the Protein Society
|February 17, 2026
概括
计算网络分析确定了控制人类加勒-7 (GAL-7) 蛋白活性的关键残留物. 破坏这种网络会损害GAL-7在细胞灭绝中的作用,为药物设计提供了一个新的策略.
科学领域:
- 生物化学 生物化学
- 计算生物学 计算生物学
- 结构生物学 结构生物学
背景情况:
- 阿洛斯特基调制提供了精确的蛋白质控制,但设计选择性抑制剂是具有挑战性的.
- 目前用于全调节器的选方法昂贵且耗时,需要预测性计算策略.
研究的目的:
- 开发一种计算方法,用于预测同位体蛋白质中的全沟通节点.
- 为了确定调节人体 galectin-7 (GAL-7) 的亲亡活性的关键残留物.
主要方法:
- 结合网络和最短路径分析,以识别反原体间通信节点.
- 通过突变识别的关键残留物 (R20,R22,D103) 来改造蛋白质变体.
- 利用生物物理和结构分析来验证预测并评估二聚体稳定性和通信.
主要成果:
- 确定了一个最小的静电网络 (R20-R22-D103) 作为GAL-7中的一个关键的全质节点.
- 工程变体 (R20A,R22A,D103A,R20A-R22A) 损害了人体T细胞中的GAL-7诱导的亡.
- 破坏R20-D103相互作用削弱了蛋白质体间的通信,并破坏了GAL-7二次体的稳定.
结论:
- 废物网络指纹识别能够预测蛋白质中全球通信通路的映射.
- R20,R22和D103是GAL-7功能的关键性决定因素.
- 整合性框架为同位体蛋白质的合理全调节器设计提供了可通用的策略.
相关概念视频
Ligand Binding and Linkage
5.7K
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...
5.7K
Allosteric Proteins-ATCase
6.7K
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...
6.7K
Cooperative Allosteric Transitions
2.7K
2.7K
Cooperative Allosteric Transitions
9.0K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
9.0K
Conserved Binding Sites
5.2K
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...
5.2K
Assembly of Signaling Complexes
6.7K
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,...
6.7K


