An integrated strategy for mapping intrinsically disordered proteins

Many proteins adopt well-defined folded structures, which are determined by their amino acid sequence and are essential for the function they perform. But intrinsically disordered proteins (IDPs) do not fold into a single structure, instead sampling a broad ensemble of rapidly interconverting conformations. This dynamic nature makes them challenging to characterize using traditional structural biology methods, which often provide only averaged or incomplete views.

Saha et al. discussed possible strategies for overcoming this problem, suggesting integrative approaches to generate conformational ensembles and bridge the gap between sequence and function for IDPs.

“The field of IDPs has advanced rapidly in recent years, driven by developments in both experimental techniques and computational modeling,” said author Wenwei Zheng. “However, this progress has also led to fragmentation, as different communities often focus on specific methods, making it unclear how these approaches should be combined in practice.”

The researchers proposed a conceptual workflow where experimental and computational approaches are conducted in parallel, each guiding the other. Experimental measurements probe distinct aspects of structural properties, while computational methods generate conformational ensembles that can be linked to experimental signals and will always be approximations.

Key to this workflow is an integrative approach, since no single method can fully resolve the complexity of IDP ensembles. By combining multiple data sources with physics-based models, integrative approaches can reduce ambiguity in inferred ensembles and provide more reliable conformational characterizations.

“We aim to promote integrative ensemble modeling as a standard approach in the field,” said Zheng. “By emphasizing best practices such as combining complementary data, choosing appropriate model resolution, and validating predictions, we hope to improve the reliability and reproducibility of IDP ensemble construction.”

Source: “In search of shape in the unshaped: Constructing ensembles of intrinsically disordered proteins,” by Debasis Saha, Wangfei Yang, and Wenwei Zheng, Biophysics Reviews (2026). The article can be accessed at https://doi.org/10.1063/5.0307183 .

This paper is part of the Disordered Proteins and Their Ensembles: Fundamental Principles and Biological Engineering Collection, learn more here .