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Molecular identification, expression and function analysis of peroxidasin in Chilo suppressalis

Insect Science 2020年第6期27卷 1173-1185页

作者： Chun-Ping Ma Zi-Mu Guo Feng-Li Zhang Jian-Ya Su Key Laboratory of Integrated Management of Crop Diseases and Pests(Ministry of Education) College of Plant ProtectionNanjing Agricultural UniversityNanjingChina

Peroxidasin plays a unique role in the formation and stability of extracellular matrix(ECM)in the animal kingdom;however,it was only characterized in Diptera,not in other insect *** this study peroxidasin(CsPxc/)was first identified and characterized from Chilo suppressalis,a lepidopteran *** complementary DNA with a 4080 bp open reading frame encodes a peptide of 1359 amino acids;the derived amino acid sequence of CsPxd harbors the typical structural characteristics of peroxidasin family in heme-peroxidase superfamily,including the signal peptide at N-terminal,leucine-rich repeat domain,Ig-loop motifs and peroxidase domain,signifying the extracellular location of protein and the involvement in ECM *** expression reveals CsPxd protein displays peroxidase activity on H2O2,justifying the membership of *** analysis shows the monophyletic evolution pattern of peroxidasin in insect phyle,and moreover only one peroxidasin is present in each species of insects,suggesting its evolutionary conservation on *** messenger RNA is mainly expressed in egg and the final instar larvae *** of peroxidasin double-stranded RNA into the final instar larvae impacts the cuticle sclerotization during the metamorphosis from larvae to pupa,and eventually lead to lethality of larvae and *** results suggest the presence of collagen crosslink in chorion and cuticle of insects,and indicate peroxidasin plays a role in the development of chorion and cuticle;furthermore peroxidasin might be the one of potential target genes for pest control using RNA interference.

关键词： Chilo suppressalis cuticle sclerotization peroxidase peroxidasin RNA interference

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