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相关概念视频

Ligand Binding Sites02:40

Ligand Binding Sites

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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...
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Conserved Binding Sites01:49

Conserved Binding Sites

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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...
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Protein-protein Interfaces02:04

Protein-protein Interfaces

14.4K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
14.4K
Induced-fit Model01:13

Induced-fit Model

88.3K
Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being consumed or permanently changed. They reduce the activation energy needed to convert the reactants into products. Enzymes are proteins, that usually work by binding to a substrate—a reactant molecule that they act upon.
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
88.3K
The Proteasome02:18

The Proteasome

10.0K
Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
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Allosteric Proteins-ATCase01:19

Allosteric Proteins-ATCase

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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...
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相关实验视频

Updated: Jan 7, 2026

Modeling an Enzyme Active Site using Molecular Visualization Freeware
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MPCutter:使用蛋白质语言模型预测蛋白质酶特定基质裂部位.

Zhe Wang1, Tuoyu Liu2, Guoshun Xu1

  • 1State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100089, China.

Genomics, proteomics & bioinformatics
|December 23, 2025
PubMed
概括
此摘要是机器生成的。

我们开发了MPCutter,这是一种新的生物信息学工具,可以准确地预测蛋白质分裂部位. 该工具增强了对蛋白质分解的理解,并通过分析蛋白质序列来确定新的治疗点.

关键词:
在MPC之外的其他.蛋白质酶可以保护蛋白酶蛋白解事件的发生.蛋白酶基质裂变预测的预测蛋白序列语言模型的模型.

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科学领域:

  • 生物化学 生物化学
  • 生物信息学是一种生物信息学.
  • 计算生物学 计算生物学

背景情况:

  • 蛋白酶是分裂键的酶,在蛋白质降解和生理过程中发挥关键作用.
  • 准确识别蛋白质酶特异性基质和分裂部位对于理解细胞功能至关重要.
  • 现有的生物信息学工具用于分离地点预测的准确性和更新频率都有局限性.

研究的目的:

  • 开发一种先进的计算工具,用于预测蛋白酶基质裂变事件.
  • 克服现有预测工具在准确性和数据范围方面的局限性.
  • 为了提供一个强大的平台,在各种蛋白质酶家族中高通量预测蛋白质酶裂变点.

主要方法:

  • 微调一个通用蛋白序列语言模型来创建MPCutter.
  • 利用序列和结构信息来增强裂变部位的预测.
  • 使用独立测试数据集对MPCutter与现有工具进行比较.

主要成果:

  • 与现有的通用工具相比,MP Cutter在预测蛋白质酶分裂部位方面表现出卓越的性能.
  • 该工具在案例研究中准确识别了大多数裂变部位,包括五个经过验证的caspase-3部位.
  • MP Cutter成功应用于人类蛋白质组,揭示了潜在的新基质和对蛋白酶功能的洞察力.

结论:

  • MP Cutter提供了更高的准确性和更广泛的覆盖范围,用于蛋白酶-基质裂解部位的预测.
  • 该工具对于高通量基质识别和探索蛋白酶蛋白解事件非常有价值.
  • MP Cutter是免费提供的,促进了蛋白质组学和药物发现的进一步研究.