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Protein Networks

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 Networks

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 Interfaces

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 Families

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...

Ligand Binding Sites

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...

Protein Organization

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: May 26, 2026

A Protocol for Computer-Based Protein Structure and Function Prediction

A Protocol for Computer-Based Protein Structure and Function Prediction

Published on: November 3, 2011

Network analysis and protein function prediction with the PRODISTIN Web site.

Anaïs Baudot¹, Ouissem Souiai, Christine Brun

¹Spanish National Cancer Research Centre, Madrid, Spain.

Methods in Molecular Biology (Clifton, N.J.)

|December 7, 2011

Summary

PRODISTIN clusters network proteins by interaction partners for functional annotation. This aids in understanding biological processes and predicting protein function within interactomes.

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A Protocol for Computer-Based Protein Structure and Function Prediction

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Area of Science:

Bioinformatics
Systems Biology
Computational Biology

Background:

Understanding macromolecular interactions is crucial for deciphering biological processes and protein functions.
Large interaction networks are complex and challenging to analyze for hidden functional information.

Purpose of the Study:

To introduce the PRODISTIN website for clustering network proteins and functional annotation.
To provide a step-by-step protocol for analyzing interaction networks using PRODISTIN.
To demonstrate the utility of PRODISTIN in predicting protein function and understanding biological processes.

Main Methods:

Utilizing the PRODISTIN web server for protein network analysis.
Clustering proteins based on shared interaction partners within an interactome.
Functional annotation of protein clusters to infer biological roles.
Applying the PRODISTIN protocol to the Campylobacter jejuni interactome.

Main Results:

PRODISTIN facilitates the functional analysis of complex interaction networks.
Protein clustering based on interaction partners aids in function prediction for uncharacterized proteins.
The analysis provides insights into the biological processes present in a given interactome.

Conclusions:

PRODISTIN is a valuable tool for dissecting complex protein interaction networks.
The PRODISTIN website enables efficient functional annotation and protein function prediction.
The presented protocol offers a practical approach to interactome analysis.