Cited by 13Protein Structure and DynamicsRNA Research and SplicingRNA and protein synthesis mechanisms

Protein language model identifies disordered, conserved motifs implicated in phase separation

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Zhang, Yumeng, Zheng, Jared, Zhang, Bin·2025·eLife

Published version of a preprint

Abstract

Intrinsically disordered regions (IDRs) play a critical role in phase separation and are essential for the formation of membraneless organelles (MLOs). Mutations within IDRs can disrupt their multivalent interaction networks, altering phase behavior and contributing to various diseases. Therefore, examining the evolutionary constraints of IDRs provides valuable insights into the relationship between protein sequences and phase separation. In this study, we utilized the ESM2 protein language model to map the residue-level mutational tolerance landscapes of IDRs. Our findings reveal that IDRs, particularly those actively participating in phase separation, contain conserved amino acids. This conservation is evident through mutational constraints predicted by ESM2 and supported by direct analyses of multiple sequence alignments. These conserved, disordered amino acids include residues traditionally identified as ‘stickers’ as well as ‘spacers’ and frequently form continuous sequence motifs. The strong conservation, combined with their potential role in phase separation, suggests that these motifs may act as functional units under evolutionary selection to support stable MLO formation. Our findings underscore the insights into phase separation’s molecular grammar made possible through evolutionary analysis enabled by protein language models.

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Authors
Zhang, Y., Zheng, J., & Zhang, B.
Affiliations
Massachusetts Institute of Technology (US)
Corresponding author
Zhang, Bin
Venue
eLife
Published
2025-10-20
Volume
14
ISSN
2050-084X (ISSN-L)
OpenAlex
W4410139515
Cited by
4
References
149
Citations by year
2026: 3 · 2025: 1
Type
posted content
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institute of General Medical Sciences (R35GM133580)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
intrinsically disordered regions, phase separation, biomolecular condensates, protein language models, ESM-2, mutational tolerance, evolutionary conservation, conserved motifs, multivalent interactions, protein sequence evolution
MeSH terms
Phase Separation, Amino Acid Sequence, Organelles, Conserved Sequence, Evolution, Molecular, Amino Acid Motifs, Intrinsically Disordered Proteins

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