ArticleProceedings of the National Academy of Sciences of the United States of America2026
Liquid-liquid phase separation enables chromatography-free purification and high-performance spidroin-amyloid hybrid silk fibers.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Large-scale production of artificial spider silk fibers requires heterologous expression of spider silk proteins (spidroins), yet current methods remain limited by low yields and costly purification processes. To overcome these challenges, we engineered mini-spidroins in which the poly-alanine motifs of the repetitive region were replaced with the non-natural amyloidogenic β16 peptide, significantly enhancing expression yields and solubility. Furthermore, we developed a simple, chromatography-free purification method for these constructs based on NaCl-induced liquid-liquid phase separation (LLPS). This one-step purification strategy reduced processing costs by up to 99% compared to conventional affinity chromatography while achieving yields of ~300 mg of purified protein per liter of shake flask culture and ~25 g L
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