|国家预印本平台
首页|Cell-free genetic devices confer autonomic and adaptive properties to hydrogels

Cell-free genetic devices confer autonomic and adaptive properties to hydrogels

Cell-free genetic devices confer autonomic and adaptive properties to hydrogels

来源:bioRxiv_logobioRxiv
英文摘要

Abstract Smart materials are able to alter one or more of their properties in response to defined stimuli. Our ability to design and create such materials, however, does not match the diversity and specificity of responses seen within the biological domain. We propose that relocation of molecular phenomena from living cells into hydrogels can be used to confer smart functionality to materials. We establish that cell-free protein synthesis can be conducted in agarose hydrogels, that gene expression occurs throughout the material and that co-expression of genes is possible. We demonstrate that gene expression can be controlled transcriptionally (using in gel gene interactions) and translationally in response to small molecule and nucleic acid triggers. We use this system to design and build a genetic device that can alter the structural property of its chassis material in response to exogenous stimuli. Importantly, we establish that a wide range of hydrogels are appropriate chassis for cell-free synthetic biology, meaning a designer may alter both the genetic and hydrogel components according to the requirements of a given application. We probe the relationship between the physical structure of the gel and in gel protein synthesis and reveal that the material itself may act as a macromolecular crowder enhancing protein synthesis. Given the extensive range of genetically encoded information processing networks in the living kingdom and the structural and chemical diversity of hydrogels, this work establishes a model by which cell-free synthetic biology can be used to create autonomic and adaptive materials. Significance statementSmart materials have the ability to change one or more of their properties (e.g. structure, shape or function) in response to specific triggers. They have applications ranging from light-sensitive sunglasses and drug delivery systems to shape-memory alloys and self-healing coatings. The ability to programme such materials, however, is basic compared to the ability of a living organism to observe, understand and respond to its environment. Here we demonstrate the relocation of biological information processing systems from cells to materials. We achieved this by operating small, programmable genetic devices outside the confines of a living cell and inside hydrogel matrices. These results establish a method for developing materials functionally enhanced with molecular machinery from biological systems.

Howard Thomas P.、Love John、Goodchild Sarah A.、Dura Gema、Banks Alice M.、Whitfield Colette J.、Fulton David A.、Fieldsend Jonathan E.

School of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle UniversityBiosciences, College of Life and Environmental Sciences, University of ExeterDefence Science and Technology LaboratorySchool of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle UniversitySchool of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle UniversitySchool of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle UniversitySchool of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle UniversityComputer Science, College of Engineering, Mathematics and Physical Sciences, University of Exeter

10.1101/2019.12.12.872622

生物工程学材料科学分子生物学

Howard Thomas P.,Love John,Goodchild Sarah A.,Dura Gema,Banks Alice M.,Whitfield Colette J.,Fulton David A.,Fieldsend Jonathan E..Cell-free genetic devices confer autonomic and adaptive properties to hydrogels[EB/OL].(2025-03-28)[2025-05-17].https://www.biorxiv.org/content/10.1101/2019.12.12.872622.点此复制

评论