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相关概念视频

Protein Organization01:24

Protein Organization

6.0K
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....
6.0K
Globular and Fibrous Proteins02:21

Globular and Fibrous Proteins

42.9K
Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
42.9K
Protein Networks02:26

Protein Networks

3.9K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
3.9K
Protein-protein Interfaces02:04

Protein-protein Interfaces

12.4K
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...
12.4K
Protein and Protein Structure02:15

Protein and Protein Structure

77.2K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
77.2K

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相关实验视频

Updated: May 8, 2025

A Protocol for Computer-Based Protein Structure and Function Prediction
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A Protocol for Computer-Based Protein Structure and Function Prediction

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基于网络的GTalign:在蛋白质结构分析中的桥梁速度和准确性.

Justas Dapkūnas1, Mindaugas Margelevičius1

  • 1Institute of Biotechnology, Life Sciences Center, Vilnius University, Saulėtekio av. 7, 10257 Vilnius, Lithuania.

Nucleic acids research
|May 7, 2025
PubMed
概括

GTalign-web提供了准确和快速的蛋白质结构对齐,有助于理解蛋白质关系和注释未知的蛋白质. 这个网络工具增强了结构生物学研究和功能基因组学.

科学领域:

  • 结构生物学是结构生物学.
  • 生物信息学是一种生物信息学.
  • 计算生物学是一种计算生物学.

背景情况:

  • 精确的蛋白质结构对齐对于破译蛋白质结构-功能关系和进化联系至关重要.
  • 对于大型结构分析,现有的工具可能面临速度或准确性的限制.
  • 对于对蛋白质结构进行比较的可访问,高性能工具的需求是持续的.

研究的目的:

  • 介绍GTalign-web,一个基于Web的平台,用于GTalign,一个空间索引驱动的蛋白质结构对齐工具.
  • 为蛋白质的结构性搜索和功能性注释提供一个用户友好和高性能解决方案.
  • 评估GTalign-web与已建立的结构对齐服务器的性能.

主要方法:

  • 开发GTalign-web作为GTalign算法的Web实现.
  • 使用空间索引进行高效的结构搜索.
  • 基准测试GTalign-web与DALI和Foldseek相比,使用已建立的数据集和指标.
  • 应用GTalign-web用于对UniRef30数据库对非特征化蛋白进行注释.

主要成果:

  • 与DALI和Foldseek服务器相比,GTalign-web显示出更高的准确性.

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  • 该工具实现了快速的搜索时间,表明了高性能.
  • 使用GTalign-web成功对未表征的蛋白质进行注释,突出了其实用的实用性.
  • 网络服务器为结构和功能蛋白质分析提供了宝贵的资源.

    • 结论:

    • GTalign-web是一个准确而有效的工具,用于蛋白质结构对齐和功能注释.
    • 基于网络的实施提高了结构生物学和生物信息学研究人员的可访问性.
    • GTalign-web是探索蛋白质结构相似性和推断功能的宝贵资源.