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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...

Protein Folding

Protein Folding

Protein and Protein Structure

Protein and Protein Structure

Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...

Molecular Chaperones and Protein Folding

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...

Amyloid Fibrils

Amyloid Fibrils

Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...

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...

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Related Experiment Video

Updated: Aug 19, 2025

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

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

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Intrinsically Disordered Proteins: An Overview.

Rakesh Trivedi¹, Hampapathalu Adimurthy Nagarajaram²

¹Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA.

International Journal of Molecular Sciences

|November 26, 2022

Summary

Many proteins lack stable structures, existing in multiple states. This review explores intrinsically disordered proteins, their function-structure relationships, detection methods, and roles in disease and drug development.

Keywords:

intrinsically disordered proteins intrinsically disordered regions protein function protein structure

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Last Updated: Aug 19, 2025

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

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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 and Molecular Biology
Structural Biology

Background:

Many proteins and protein segments lack stable three-dimensional structures under physiological conditions.
These intrinsically disordered proteins (IDPs) and regions (IDRs) are abundant and perform diverse effector functions.
The 'Disorder-function paradigm' highlights the importance of conformational flexibility in protein activity.

Purpose of the Study:

To review the multifaceted aspects of disordered proteins and regions.
To discuss experimental and computational methodologies for characterizing IDPs/IDRs.
To explore the implications of protein disorder in disease and its potential as a drug target.

Main Methods:

Literature review of disordered proteins and their functions.
Discussion of experimental techniques (e.g., NMR, SAXS) for characterizing IDPs/IDRs.
Overview of computational approaches for predicting and analyzing protein disorder.

Main Results:

Intrinsically disordered proteins are crucial for various biological processes.
A range of experimental and computational tools are available for studying protein disorder.
Disordered proteins are implicated in numerous diseases and represent promising therapeutic targets.

Conclusions:

The 'Disorder-function paradigm' is a fundamental concept in modern protein science.
Characterization of IDPs/IDRs requires specialized methodologies.
Targeting disordered proteins offers new avenues for disease treatment.