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Related Concept Videos

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-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 Organization01:24

Protein Organization

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.
Protein Organization01:13

Protein Organization

Overview
Protein Organization01:24

Protein Organization

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.

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Related Experiment Video

Updated: Jul 5, 2026

A Web Tool for Generating High Quality Machine-readable Biological Pathways
08:01

A Web Tool for Generating High Quality Machine-readable Biological Pathways

Published on: February 8, 2017

Computing chemical organizations in biological networks.

Florian Centler1, Christoph Kaleta, Pietro Speroni di Fenizio

  • 1Bio Systems Analysis Group, Jena Centre for Bioinformatics (JCB) and Department of Mathematics and Computer Science, Friedrich-Schiller-University Jena, D-07743 Jena, Germany.

Bioinformatics (Oxford, England)
|May 16, 2008
PubMed
Summary

We developed algorithms to analyze complex biochemical reaction networks using the theory of chemical organizations. These tools compute organization hierarchies, revealing model structure and quality for systems biology.

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Applying Cheminformatics to Develop a Structure Searchable Database of Analytical Methods
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Applying Cheminformatics to Develop a Structure Searchable Database of Analytical Methods

Published on: June 6, 2025

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Last Updated: Jul 5, 2026

A Web Tool for Generating High Quality Machine-readable Biological Pathways
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A Web Tool for Generating High Quality Machine-readable Biological Pathways

Published on: February 8, 2017

Applying Cheminformatics to Develop a Structure Searchable Database of Analytical Methods
05:34

Applying Cheminformatics to Develop a Structure Searchable Database of Analytical Methods

Published on: June 6, 2025

Area of Science:

  • Systems Biology
  • Computational Biology
  • Biochemistry

Background:

  • Computational models of intracellular processes are growing in size and complexity.
  • Novel analysis techniques are needed for these large-scale models.
  • The theory of chemical organizations offers a method to link network topology to dynamics.

Purpose of the Study:

  • To present algorithms for computing the hierarchy of organizations in biochemical reaction network models.
  • To provide tools for analyzing the structure and quality of biological models.
  • To facilitate the study of complex intracellular processes.

Main Methods:

  • Developed three algorithms to compute organization hierarchies for models in Systems Biology Markup Language (SBML) format.
  • Implemented bottom-up constructive and flux-based approaches for exhaustive hierarchy computation.
  • Utilized heuristic methods for subset organization computation in large models.

Main Results:

  • Presented algorithms for computing organization hierarchies in SBML network models.
  • Demonstrated that no single exhaustive algorithm is superior for all network types.
  • Showcased the utility of organization hierarchies in analyzing large-scale models, identifying unexplained components.

Conclusions:

  • The presented algorithms and the theory of chemical organizations provide valuable tools for analyzing complex biological models.
  • Organization hierarchies aid in uncovering model structure and evaluating model quality.
  • These methods are crucial for advancing the analysis of intracellular processes in systems biology.