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Recombinant proteins are polymers that offer the materials engineer absolute control over chain length and composition: key attributes required for design of advanced polymeric materials. Through this control, these polymers can be encoded to contain information that enables them to respond as the environment changes. However, despite their promise, protein-based materials are under-represented in materials science. In this chapter we investigate why this is and describe recent efforts to address this. We discuss constraints limiting rational design of structural proteins for advanced materials; advantages and disadvantages of different recombinant expression platforms; and, methods to fabricate proteins into solid-state materials. Finally, we describe the silk proteins used in our laboratory as templates for information-containing polymers.
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http://dx.doi.org/10.1007/978-3-319-49674-0_15 | DOI Listing |
J Agric Food Chem
September 2025
Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China.
Soy protein remains a key component of plant-based food development, but its application is challenged by inherent allergenicity. Previous work identified that native amyloid-like protein aggregates in soy 7S globulin that resist gastrointestinal digestion and exhibit pronounced antigenicity. Herein, we demonstrate that protein deamidation significantly enhances proteolysis under an infant gastrointestinal digestion model, leading to ∼80 and 50% reductions in IgG- and IgE-binding capacities, respectively.
View Article and Find Full Text PDFMol Biol Evol
September 2025
Department of Laboratory Medicine and Pathology, University of Washington Medical Center, Seattle, Washington, USA.
Human parainfluenza virus 2 (HPIV-2) and human parainfluenza virus 4 (HPIV-4) are significant but underappreciated respiratory pathogens, particularly among high-risk populations including children, the elderly, and immunocompromised individuals. In this study, we sequenced 101 HPIV-2 and HPIV-4 genomes from respiratory samples collected in western Washington State and performed comprehensive evolutionary analyses using both new and publicly available sequences. Phylogenetic and phylodynamic analyses revealed that both HPIV-2 and HPIV-4 evolve at significantly faster rates compared to mumps virus, a reference human orthorubulavirus.
View Article and Find Full Text PDFSci Adv
September 2025
Division of Basic Sciences, Fred Hutchinson Cancer Center, Seattle, WA 98109, USA.
Integrins bind ligands between their alpha (α) and beta (β) subunits and transmit signals through conformational changes. Early in chordate evolution, some α subunits acquired an "inserted" (I) domain that expanded integrin's ligand-binding repertoire but obstructed the ancestral ligand pocket, seemingly blocking conventional integrin activation. Here, we compare cryo-electron microscopy structures of apo and ligand-bound states of the I domain-containing αEβ integrin and the I domain-lacking αβ integrin to illuminate how the I domain intrinsically mimics an extrinsic ligand to preserve integrin function.
View Article and Find Full Text PDFSci Adv
September 2025
Department of Molecular and Cellular Biology, University of California, Davis, Davis, CA, USA.
Understanding how cells control their biophysical properties during development remains a fundamental challenge. While macromolecular crowding affects multiple cellular processes in single cells, its regulation in living animals remains poorly understood. Using genetically encoded multimeric nanoparticles for in vivo rheology, we found that tissues maintain mesoscale properties that differ from those observed across diverse systems, including bacteria, yeast species, and cultured mammalian cells.
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September 2025
Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA.
Sterols are essential isoprenoid derivatives that contribute to membrane structure and function. In plants, they also serve as precursors to phytohormones and specialized metabolites important for development, defense, and health. Although the sterol biosynthetic pathway is considered well-characterized, we report the discovery of a plant-specific cytochrome -like protein, CB5LP, as a critical component of phytosterol biosynthesis.
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