相关实验视频
Updated: Jul 21, 2026

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A Protocol for Computer-Based Protein Structure and Function Prediction
Published on: November 3, 2011
一个用于全基因组预测蛋白质功能的综合算法
E M Marcotte1, M Pellegrini, M J Thompson
1Molecular Biology Institute, UCLA-DOE Laboratory of Structural Biology and Molecular Medicine, University of California, Los Angeles 90095, USA.
Nature
|November 26, 1999
概括
研究人员通过分析相关进化,基因表达和域融合来绘制酵母蛋白的功能. 这确定了超过93,000个功能链接,将功能分配给一半以上以前未被描述的酵母蛋白.
科学领域:
- 蛋白质组学是指蛋白质组学.
- 生物信息学是一种生物信息学.
- 系统生物学 系统生物学
背景情况:
- 基因组学的进步使得蛋白质功能和相互作用发现的新方法成为可能.
- 了解蛋白质网络对于破译细胞机制至关重要.
研究的目的:
- 为了确定Saccharomyces cerevisiae蛋白质之间的功能关系.
- 为以前未被描述的酵母蛋白赋予功能.
主要方法:
- 蛋白质根据相关进化被分组.
- 使者RNA表达模式分析了相关性.
- 研究了蛋白质域融合的模式.
- 从这些综合数据中推断出功能联系.
主要成果:
- 发现了93,000多个功能相关的酵母蛋白之间的对联链接.
- 超过50%的以前未被描述的酵母蛋白 (2557种蛋白质) 被赋予了功能性作用.
- 具体的例子包括一种新型蛋白质家族,一种与癌症有关的蛋白质同类物,以及酵母 Sup35.5.
结论:
- 进化,表达和结构数据的综合分析有效地揭示了蛋白质功能网络.
- 这种方法显著增强了蛋白质组的注释,特别是对于未表征的蛋白质.
- 已识别的链接为进一步的实验验证和生物发现提供了基础.
相关概念视频
Protein Families
Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key locations, protein...
Conservation of Protein Domains Over Different Proteins
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 form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Protein-protein Interfaces
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 polypeptide...
Protein Networks
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,...
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Genome Annotation and Assembly
The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
Proteomics
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...

