数字农科院2.0

Characterization And Function Of Two S.hort Peptidoglycan Recognition Proteins I nvolved In The Immunity Of Bactrocera Dorsalis (Hendel)

文献类型： 外文期刊

作者： Wei, Dong;Liu, Yu-Wei;Wei, Dong;Zhang, Ying-Xin;Wang, Jin-Jun;Zhang, Ying-Xin;Liu, Yu-Wei;Wang, Jin-Jun

作者机构：

关键词： oriental fruit fly; peptidoglycan; peptidoglycan recognition protein; PGRP; antimicrobial peptide; innate immune

期刊名称： INSECTS

ISSN： 2075-4450

年卷期： 2019 年 10 卷 3 期

页码：

摘要： Peptidoglycans (PGNs) are major bacterial components recognized by the immune systems of insects and mammals. PGN recognition proteins (PGRPs) are widely distributed and highly conserved in vertebrates and invertebrates. PGRPs are a family of pattern recognition receptors that recognize peptidoglycan and regulate immune responses. In this study, we cloned two PGRP genes (BdPGRP-SA and BdPGRP-SD) from Bactrocera dorsalis (Hendel), which encode 192 and 196 amino acid residues, respectively. Both genes were highly expressed in adults, especially in the fat body and midgut. These two genes were up-regulated when challenged by the immune triggers, PGN-EB (Escherichia coli O111:B4) and PGN-SA (Staphylococcus aureus). The suppression of transcriptional expression of either gene by RNA interference (RNAi) resulted in increased sensitivities to Gram-negative E. coli and Gram-positive S. aureus PGNs. Suppression of BdPGRP-SA and -SD expression by RNAi resulted in weak expressions of four antimicrobial peptides (AMPs) upon injected with E. coli or S. aureus. BdPGRP-SA and -SD are involved in recognizing both Gram-negative and Gram-positive bacteria independently to activate the downstream AMP's response to bacterial infection.

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