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Identification and Functional Analysis of Chitin Synthase A in Oriental Armyworm, Mythimna separata.

Proteomics 2017 November
Chitin synthases are very important enzymes for chitin synthesis in various species, which makes them a specific target of insecticides. In the present study, the function of the chitin synthase A (CHSA) gene isolated from Mythimna separate is investigated. The majority of dsMysCHSA treated larvae (89.50%) exhibit lethal phenotypes, including three phenotypes with severe cuticle deformations. The dsMysCHSA treatment in adult females affects oogenesis, and significantly reduce the ovary size and the oviposition number compared with controls. To determine how MysCHSA affects female fecundity, combined analyses of RNA-sequencing (RNA-Seq) transcriptome and TMT proteome (tandem mass tags) data in M. separata after treatment with MysCHSA-RNAi is performed. The differentially expressed proteins and genes affect fecundity-related proteins, energy metabolism, fatty acid metabolism, amino sugars, and nucleotide sugar metabolism pathways. Taken together, these results suggest that MysCHSA acts on M. separata ecdysis and fecundity, and has the potential as a target gene for pest control.

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