Peer-reviewed veterinary case report
What makes biomolecular condensates stretchy and squishy in cells
By Garcia PL & Joseph JA.·2026·Department of Chemical and Biological Engineering, United States·View original on Europe PMC →
PetCaseFinder translated the abstract of this peer-reviewed paper into plain English so pet owners can read it. We do not publish original research — every detail traces back to the citation above. How we work →
Original publication title: Molecular origins of viscoelasticity in biomolecular condensates.
Plain-English summary
This study looks at special structures in cells called biomolecular condensates, which help organize different functions without being enclosed by membranes. Researchers used computer simulations to understand how these condensates respond to stress and how their unique properties depend on the types of proteins involved. They found that the way these proteins interact and their arrangement affects how well the condensates can stretch and return to their original shape. The findings suggest that the mechanics of these condensates are important for how cells sense and respond to their surroundings, and this knowledge could help in designing new materials with specific properties. Overall, the research sheds light on how these cell structures work and their potential applications.
Abstract
Biomolecular condensates are membraneless organelles that compartmentalize functions in living cells. Formed by the phase separation of biomolecules, condensates possess a wide range of mechanical responses. However, how condensate viscoelastic response is encoded in the chemistries of their constituents-such as intrinsically disordered proteins (IDPs)-is not well understood. Here, we employ molecular dynamics simulations to connect measurable condensate viscoelasticity to the architectural heterogeneity and dynamic reconfigurability of associative networks formed by IDPs. Using a residue-resolution coarse-grained model, we characterize biologically relevant and synthetic condensates, demonstrating that the temperature sensitivity of elasticity is sequence-dependent and modeled by exponential scaling laws. We interrogate condensate mesh heterogeneity via entanglement spacing, finding that entropy-driven structural heterogeneity and reduced IDP hydrophobicity favor condensate elasticity. Furthermore, we construct graph-theoretical representations of condensates and find that interaction network topologies with an abundance of redundant node pathways translate to more load-bearing paths for mechanical stress storage. Strikingly, we discover that elastic coupling of IDPs within condensates emerges when single-molecule shape memory timescales approach mesh reconfiguration timescales. This interplay of timescales for molecular and microstructural processes, which we introduce as the condensate Deborah number, dictates how restoring elastic forces propagate and are stored across IDP networks, linking condensate microstructure dynamics directly to mechanical responses. Taken together, our work provides a conceptual framework of how condensates act as stress-responsive biomaterials, helping illuminate how cells exploit condensate mechanics to sense and regulate their internal environment and opening avenues for the design of condensates with programmable viscoelastic properties.
Find similar cases for your pet
PetCaseFinder finds other peer-reviewed reports of pets with the same symptoms, plus a plain-English summary of what was tried across them.
Search related cases →Original publication on Europe PMC: https://europepmc.org/article/MED/41670285