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Intrinsically Disordered Proteins

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...

Intrinsically Disordered Proteins

Intrinsically Disordered Proteins

Conserved Binding Sites

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...

Conserved Binding Sites

Conserved Binding Sites

Conservation of Protein Domains Over Different Proteins

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...

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: Apr 12, 2026

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Published on: November 1, 2024

Evolutionarily conserved network properties of intrinsically disordered proteins.

Nivedita Rangarajan¹, Prakash Kulkarni², Sridhar Hannenhalli³

¹Indian Institute of Science Education and Research, Pune, India.

|May 15, 2015

Summary

Intrinsically disordered proteins (IDPs) form modular networks and connect to the protein interaction network (PIN) via critical hubs. These conserved network properties reveal the functional roles of IDPs across species.

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Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins

Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins

Published on: September 23, 2021

Area of Science:

Biochemistry
Systems Biology
Bioinformatics

Background:

Intrinsically disordered proteins (IDPs) lack stable structures but gain order upon partner binding.
IDPs exhibit structural flexibility and bind diverse partners, but their network roles are unclear.

Purpose of the Study:

To conduct the first comprehensive analysis of network properties for IDP-associated sub-networks.
To investigate the functional significance of IDP network characteristics across multiple species.

Main Methods:

Network analysis of protein-protein interaction networks (PINs).
Comparative analysis of IDP-induced sub-networks from yeast to human.

Main Results:

IDPs display higher-than-expected modularity within their networks.
IDPs connect to the broader PIN through highly central proteins, acting as critical communication links.
IDPs are predominantly found at the upper levels of regulatory hierarchies.

Conclusions:

IDP-centric networks exhibit conserved properties, including modularity.
A distinct layer of critical nodes facilitates communication between IDP modules and the wider protein interaction network.