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相关概念视频

Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

13.1K
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
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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 Organization01:24

Protein Organization

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Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence....
6.5K
Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

10.9K
Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
10.9K
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

5.5K
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
5.5K
Protein-protein Interfaces02:04

Protein-protein Interfaces

12.5K
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...
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相关实验视频

Updated: Jun 30, 2025

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

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使用机器学习对蛋白质激酶结构进行分类.

Ivan Reveguk1, Thomas Simonson1

  • 1Laboratoire de Biologie Structurale de la Cellule (CNRS UMR7654), Ecole Polytechnique, Palaiseau, France.

Protein science : a publication of the Protein Society
|March 19, 2024
PubMed
概括
此摘要是机器生成的。

机器学习模型准确地分类蛋白质激酶结构,区分活性/无活性状态和DFG动机位置. 这有助于通过分析结构数据来理解激酶信号和药物开发.

关键词:
亚太酶 ATPase 是一种酶.在XGBoost中使用.数据挖掘是数据挖掘的一个方法.结构生物学结构生物学

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Identification of Kinase-substrate Pairs Using High Throughput Screening
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相关实验视频

Last Updated: Jun 30, 2025

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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Identification of Kinase-substrate Pairs Using High Throughput Screening
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A Protocol for Computer-Based Protein Structure and Function Prediction
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科学领域:

  • 结构生物学是结构生物学.
  • 计算生物学是一种计算生物学.
  • 药理学 药理学是指药理学的学科.

背景情况:

  • 蛋白激酶在细胞信号传递中至关重要,并且是重要的药物标.
  • 激酶活性是由结构变化调节的,特别是在催化域的激活循环和DFG动机中.
  • 准确的基因酶结构注释对于向药物设计至关重要,但需要可扩展和可解释的方法.

研究的目的:

  • 开发和验证可解释的机器学习模型,用于对蛋白激酶结构的自动注释.
  • 根据它们的活性/无活性状态和DFG基因构造 (DFG-in,DFG-out,其他) 来分类激酶结构.
  • 识别驱动酶构造状态的关键结构特征,并评估像AlphaFold2.2这样的工具预测结构的准确性.

主要方法:

  • 收集并策划了多样化的蛋白质激酶催化域序列和结构数据集.
  • 基于DFG形状的集群结构,并为训练手动注释它们.
  • 开发集体决策树模型,最初使用1692个结构变量来分类酶状态和DFG结构.

主要成果:

  • 主动/非主动分类模型在3289个结构上实现了99.9%的准确性.
  • 在8826个结构上,德意志工业大学 (DFG) 的形状模型实现了>99.8%的准确性.
  • 确定了关键的结构变量,主要在激活循环附近,这些变量对分类至关重要,为构造偏好提供了洞察力.

结论:

  • 可解释的机器学习模型为蛋白质激酶的大规模结构注释提供了强大的自动化方法.
  • 这些模型准确地分类了酶构造,有助于理解信号通路和药物向.
  • 对AlphaFold2预测结构的分析显示,与蛋白质数据库相比,DFG-in比例存在差异,突出了这些模型对评估预测结构的有用性.