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Related Concept Videos

Protein-protein Interfaces02:04

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-Protein Interfaces02:04

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 Networks02:26

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,...
Protein Networks02:26

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,...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...

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Related Experiment Video

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Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay (PCA) in Living Cells
08:38

Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay (PCA) in Living Cells

Published on: March 3, 2015

An ontology-based search engine for protein-protein interactions.

Byungkyu Park1, Kyungsook Han

  • 1School of Computer Science and Engineering, Inha University, Incheon 402-751, South Korea. bpark@inhaian.net

BMC Bioinformatics
|February 4, 2010
PubMed
Summary

A novel method uses modified Gödel numbers to represent protein-protein interactions and Gene Ontology (GO) terms. This approach enables efficient, biologically meaningful searches, overcoming limitations of traditional keyword matching.

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Area of Science:

  • Bioinformatics
  • Computational Biology
  • Systems Biology

Background:

  • Traditional protein-protein interaction database searches rely on keyword or ID matching.
  • These syntactic methods often yield insufficient or no results, missing potential interactions.
  • Existing search strategies struggle with proteins lacking explicit annotations matching query terms.

Purpose of the Study:

  • To develop a novel search method for protein-protein interactions.
  • To enhance the biological relevance and efficiency of database searches.
  • To overcome the limitations of conventional keyword and ID matching.

Main Methods:

  • Developed a new representation for protein-protein interactions and Gene Ontology (GO) terms using modified Gödel numbers.
  • Implemented a search engine utilizing this representation for efficient querying.
  • Employed unique prime factorization of modified Gödel numbers to identify interaction partners based on query proteins and GO terms.

Main Results:

  • The modified Gödel number representation enables biologically meaningful searches.
  • The search engine efficiently identifies protein-protein interactions through prime factorization.
  • The method successfully retrieves interactions missed by traditional keyword/ID matching, including those with more specific GO term annotations.

Conclusions:

  • Representing protein-GO annotations with modified Gödel numbers facilitates efficient interaction retrieval via prime factorization.
  • This novel approach enhances search completeness by identifying interactions involving proteins with indirect or more specific annotations.
  • The developed method offers a significant improvement over syntactic search strategies for large-scale protein-protein interaction databases.