数字农科院2.0

A Core Structural Protein That Builds the Locust Mandible with a Mechanical Gradient

文献类型： 外文期刊

作者： Qi, Huitang;Ding, Yi;Teng, Yingda;Liang, Xiangyu;Chen, Lei;Ma, Jianli;Yang, Qing;Liu, Tian

作者机构：

关键词： （0-2-2）Biomimetic materials;mechanical gradient;self-assembly;locustmandible;protein;chitin

期刊名称： ACS Nano

ISSN： 1936-0851

年卷期： 2024 年 17 卷 24 期

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Natural materials, such as locust mandibles and squid beaks, define significant mechanical gradients that have been attributed to the chemical gradients of their specialized structural proteins (SPs). However, the mechanism by which SPs form chemical gradients in these materials remains unknown. In this study, a highly abundant histidine-rich structural protein (LmMHSP) was identified in the mandible of a migratory locust (Locusta migratoria). LmMHSP was proven by both in vivo and in vitro evidence to act as a core building block of the mandible with a variety of synergistic functions including chitin binding, matrix formation via liquid-liquid phase separation, chemical cross-linking, and metal coordination. Furthermore, we found that the SP gradient in the locust mandible stems from the chitin-binding activity of LmMHSP and different microstructures of chitin scaffolds in different regions. These findings advance our understanding of the formation mechanisms of natural biomaterials and have implications for the fabrication of biomimetic materials.

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