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<p>Stress stimulation-mediated liquid-liquid phase separation is a key activity in living organisms, but its biophysical characteristics are poorly understood. Here, we report a UV-light stress stimulation behaviour in a binary community of synthetic protocells of condensates and proteinosomes, showing that condensates could behave like Condensate Pumps to enable a stepwise controlled transmembrane mass transfer regardless of the permeability barrier of proteinosomes. The stimulation mechanism of interfacial tension-induced proteinosome deformation and transient high osmotic pressure arisen by the dissociation of condensate is proposed. Accordingly, under UV-light stress stimulation, unexpected characteristics could be triggered by transmembrane pumping oversized biomacromolecules into proteinosomes including liquid-liquid reentrant phase separation, DNA unwinding, and protein synthesis. Therefore, our results not only reveal unique physical principles and potential characteristics of macromolecular assemblies at droplet-membrane interface but also highlight a pathway for transmembrane transport of biomacromolecules which is anticipated to serve as a powerful technique to inducing higher-order behaviour in synthetic protocells community.</p>

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Liquid-liquid phase separation-boosted transmembrane delivery in interactive protocell communities

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年6月5日

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  • Yan Huang,
  • Haixu Chen,
  • Xin Qiao,
  • Shangsong Li,
  • Xiaoliang Wang,
  • Xiaoman Liu,
  • Xin Huang

摘要

Stress stimulation-mediated liquid-liquid phase separation is a key activity in living organisms, but its biophysical characteristics are poorly understood. Here, we report a UV-light stress stimulation behaviour in a binary community of synthetic protocells of condensates and proteinosomes, showing that condensates could behave like Condensate Pumps to enable a stepwise controlled transmembrane mass transfer regardless of the permeability barrier of proteinosomes. The stimulation mechanism of interfacial tension-induced proteinosome deformation and transient high osmotic pressure arisen by the dissociation of condensate is proposed. Accordingly, under UV-light stress stimulation, unexpected characteristics could be triggered by transmembrane pumping oversized biomacromolecules into proteinosomes including liquid-liquid reentrant phase separation, DNA unwinding, and protein synthesis. Therefore, our results not only reveal unique physical principles and potential characteristics of macromolecular assemblies at droplet-membrane interface but also highlight a pathway for transmembrane transport of biomacromolecules which is anticipated to serve as a powerful technique to inducing higher-order behaviour in synthetic protocells community.