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Intrinsically Disordered Proteins

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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...

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Related Experiment Video

Updated: Sep 13, 2025

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

Functions of Intrinsically Disordered Regions.

Linhu Xiao^1,2, Kun Xia^1,2

¹MOE Key Lab of Rare Pediatric Diseases, School of Basic Medicine, Hengyang Medical College, University of South China, Hengyang 421001, China.

|July 29, 2025

Summary

Intrinsically disordered regions (IDRs) drive liquid-liquid phase separation (LLPS) crucial for cellular function. Disrupted LLPS is linked to diseases like autism spectrum disorder (ASD), highlighting IDRs as key pathogenic factors.

Keywords:

intrinsically disordered regions liquid–liquid phase separation molecular recognition features post-translation modification

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Last Updated: Sep 13, 2025

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Author Spotlight: Unlocking the World of Intrinsically Disordered Regions with Cellular Sensing and Responses

Author Spotlight: Unlocking the World of Intrinsically Disordered Regions with Cellular Sensing and Responses

Published on: January 12, 2024

Area of Science:

Biochemistry
Cell Biology
Genetics

Background:

Intrinsically disordered regions (IDRs) are protein segments lacking stable structures, abundant in the human proteome.
IDRs contain molecular recognition features (MoRFs) and post-translational modification sites, facilitating dynamic interactions.
IDRs are critical for liquid-liquid phase separation (LLPS), forming essential biomolecular condensates.

Purpose of the Study:

To explore the role of IDRs in LLPS and its implications for cellular function.
To investigate how LLPS disruption contributes to disease pathogenesis.
To understand the potential of LLPS in unraveling complex disorders like ASD.

Main Methods:

Analysis of protein structure-function relationships.
Investigating molecular interactions and phase separation phenomena.
Examining the link between LLPS dysregulation and disease mechanisms.

Main Results:

IDRs drive LLPS through multivalent interactions, creating functional biomolecular condensates.
LLPS condensates regulate intracellular processes, enhancing specificity and efficiency.
Disruption of LLPS homeostasis is implicated in various diseases, including ASD.

Conclusions:

IDRs and LLPS are fundamental to cellular organization and function.
Dysregulation of LLPS contributes significantly to disease pathogenesis.
Studying LLPS offers novel insights into multifactorial disorders like ASD.