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Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.

Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.

Positive Regulator Molecules

Positive Regulator Molecules

Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.

Positive Regulator Molecules

Positive Regulator Molecules

Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.

Positive Regulator Molecules

Positive Regulator Molecules

To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.

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,...

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Related Experiment Video

Updated: Jun 15, 2026

Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline

Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline

Published on: December 7, 2021

Characterizing regulatory path motifs in integrated networks using perturbational data.

Anagha Joshi¹, Thomas Van Parys, Yves Van de Peer

¹Department of Plant Systems Biology, VIB, Technologiepark 927, Gent, Belgium. anagha.joshi@psb.vib-ugent.be

|March 17, 2010

Summary

Pathicular is a new Cytoscape plugin that analyzes cellular responses to transcription factor changes. It identifies key regulatory pathways by integrating multiple biological network types for deeper biological insights.

More Related Videos

Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes

Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes

Published on: May 31, 2011

Related Experiment Videos

Last Updated: Jun 15, 2026

Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline

Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline

Published on: December 7, 2021

Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes

Using SCOPE to Identify Potential Regulatory Motifs in Coregulated Genes

Published on: May 31, 2011

Area of Science:

Bioinformatics
Systems Biology
Computational Biology

Background:

Understanding cellular responses to transcription factor perturbations is crucial in systems biology.
Integrating diverse biological networks (transcriptional, protein-protein, phosphorylation) provides a holistic view of cellular regulation.

Purpose of the Study:

To introduce Pathicular, a Cytoscape plugin designed for analyzing cellular responses to transcription factor perturbations.
To develop a method for identifying significant regulatory path motifs within integrated biological networks.

Main Methods:

Pathicular integrates perturbational expression data with transcriptional, protein-protein, and phosphorylation networks.
The plugin identifies 'regulatory path motifs' – short paths overrepresented between transcription factors and their targets in perturbational data.
A case study was performed using Saccharomyces cerevisiae data.

Main Results:

The study identified eight distinct regulatory path motifs in Saccharomyces cerevisiae.
The biological significance of these identified motifs was demonstrated.

Conclusions:

Pathicular provides a novel approach for dissecting complex cellular responses to transcription factor perturbations.
The identified regulatory path motifs offer valuable insights into gene regulation and cellular function.