AA15 lytic polysaccharide monooxygenase is required for efficient chitinous cuticle turnover during insect molting

文献类型： 外文期刊

第一作者： Qu, Mingbo

作者： Qu, Mingbo;Guo, Xiaoxi;Tian, Shuang;Yang, Qing;Yang, Qing;Yang, Qing;Kim, Myeongjin;Mun, Seulgi;Arakane, Yasuyuki;Noh, Mi Young;Kramer, Karl J.;Muthukrishnan, Subbaratnam

作者机构：

期刊名称：COMMUNICATIONS BIOLOGY （ 影响因子：6.548； 五年影响因子：6.816 ）

ISSN：

年卷期： 2022 年 5 卷 1 期

页码：

收录情况： SCI

摘要： Microbial lytic polysaccharide monooxygenases (LPMOs) catalyze the oxidative cleavage of crystalline polysaccharides including chitin and cellulose. The discovery of a large assortment of LPMO-like proteins widely distributed in insect genomes suggests that they could be involved in assisting chitin degradation in the exoskeleton, tracheae and peritrophic matrix during development. However, the physiological functions of insect LPMO-like proteins are still undetermined. To investigate the functions of insect LPMO15 subgroup I-like proteins (LPMO15-1s), two evolutionarily distant species, Tribolium castaneum and Locusta migratoria, were chosen. Depletion by RNAi of T. castaneum TcLPMO15-1 caused molting arrest at all developmental stages, whereas depletion of the L. migratoria LmLPMO15-1, prevented only adult eclosion. In both species, LPMO15-1-deficient animals were unable to shed their exuviae and died. TEM analysis revealed failure of turnover of the chitinous cuticle, which is critical for completion of molting. Purified recombinant LPMO15-1-like protein from Ostrinia furnacalis (rOfLPMO15-1) exhibited oxidative cleavage activity and substrate preference for chitin. These results reveal the physiological importance of catalytically active LPMO15-1-like proteins from distant insect species and provide new insight into the enzymatic mechanism of cuticular chitin turnover during molting. Microbial lytic polysaccharide monooxygenases (LPMOs) catalyze the cleavage of chitin and cellulose. Here, characterisation of LPMO15-1-like proteins from insect reveal their catalytic activity and physiological importance for insect development.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序