Cited by 1,803RNA Research and SplicingProtein Structure and DynamicsGenomics and Chromatin Dynamics

Phase Transition of a Disordered Nuage Protein Generates Environmentally Responsive Membraneless Organelles

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Nott, Timothy J., Petsalaki, Evangelia, Farber, Patrick, Jervis, Dylan, Fussner, Eden, Plochowietz, Anne, Craggs, Timothy D., Bazett-Jones, David P. +3 more·2015·Molecular Cell

Abstract

Cells chemically isolate molecules in compartments to both facilitate and regulate their interactions. In addition to membrane-encapsulated compartments, cells can form proteinaceous and membraneless organelles, including nucleoli, Cajal and PML bodies, and stress granules. The principles that determine when and why these structures form have remained elusive. Here, we demonstrate that the disordered tails of Ddx4, a primary constituent of nuage or germ granules, form phase-separated organelles both in live cells and in vitro. These bodies are stabilized by patterned electrostatic interactions that are highly sensitive to temperature, ionic strength, arginine methylation, and splicing. Sequence determinants are used to identify proteins found in both membraneless organelles and cell adhesion. Moreover, the bodies provide an alternative solvent environment that can concentrate single-stranded DNA but largely exclude double-stranded DNA. We propose that phase separation of disordered proteins containing weakly interacting blocks is a general mechanism for forming regulated, membraneless organelles.

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Authors
Nott, T. J., Petsalaki, E., Farber, P., Jervis, D., Fussner, E., Plochowietz, A., Craggs, T. D., Bazett-Jones, D. P., Pawson, T., Forman-Kay, J. D., & Baldwin, A. J.
Affiliations
  • Mount Sinai Hospital (CA)
  • Hospital for Sick Children (CA)
  • University of Toronto (CA)
  • University of Oxford (GB)
Corresponding author
  • Forman-Kay, Julie D.
  • Baldwin, Andrew J.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2015-03
Volume
57
Issue
5
Pages
936-947
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2168639701
Cited by
1,803
References
2
Citations by year
2026: 125 · 2025: 176 · 2024: 194 · 2023: 195 · 2022: 198 · 2021: 246 · 2020: 195 · 2019: 165 · 2018: 136 · 2017: 78 · 2016: 65 · 2015: 23 · 2014: 2
FWCI
43.73
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Health Canada
  • Canadian Institutes of Health Research (-MOP-6849)
  • Biotechnology and Biological Sciences Research Council (BB/J014346/1)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
phase separation, biomolecular condensates, intrinsically disordered proteins, DDX4, nuage, germ granules, electrostatic interactions, arginine methylation, splicing, single-stranded DNA, temperature sensitivity, ionic strength, cell adhesion, liquid-liquid phase separation
MeSH terms
Amino Acid Sequence, Cell Nucleus, Cytoplasmic Granules, DNA, HeLa Cells, Humans, Intracellular Membranes, Luminescent Proteins, Methylation, Microscopy, Fluorescence, Molecular Sequence Data, Mutation, Osmolar Concentration, Organelles, Sequence Homology, Amino Acid, Microscopy, Confocal, Transition Temperature, Phase Transition, DEAD-box RNA Helicases, Static Electricity, Time-Lapse Imaging

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