Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.
Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.
Sci Rep. 2017 May 2;7(1):1298. doi: 10.1038/s41598-017-01383-2.
Venoms secreted by the venom gland (VG) of parasitoid wasp help ensure successful parasitism by host immune suppression and developmental regulation. Cotesia vestalis, a larval endoparasitoid, and Diadromus collaris, a pupal endoparasitoid, parasitize the diamondback moth (DBM), Plutella xylostella. To explore and compare the venom components of two endoparasitoids, we sequenced transcriptomes of the VGs and wasp bodies without VGs (BWVGs) of the two endoparasitoids. Statistically enriched GO terms and KEGG pathways of the two VGs compared to respective whole-body background were similar and reflected active protein biosynthesis activities in the two VGs. 1,595 VG specific genes of the D. collaris VG and 1,461 VG specific genes of the C. vestalis VG were identified by comparative transcript profiling. A total of 444 and 513 genes encoding potential secretory proteins were identified and defined as putative venom genes in D. collaris VG and C. vestalis VG, respectively. The putative venom genes of the two wasps showed no significant similarity or convergence. More venom genes were predicted in D. collaris VG than C. vestalis VG, especially hydrolase-coding genes. Differences in the types and quantities of putative venom genes shed light on different venom functions.
蜂的毒液腺(VG)分泌的毒液有助于通过宿主免疫抑制和发育调节来确保成功寄生。小菜蛾幼虫内寄生蜂,甘蓝夜蛾幼虫内寄生蜂,和钻蛀性蛹内寄生蜂,Diadromus collaris,寄生小菜蛾,Plutella xylostella。为了探索和比较两种内寄生蜂的毒液成分,我们对两种内寄生蜂的 VG 和无 VG 的蜂体(BWVG)进行了转录组测序。与各自的全身背景相比,两种 VG 的统计上富集的 GO 术语和 KEGG 途径相似,反映了两种 VG 中活跃的蛋白质生物合成活性。通过比较转录谱,鉴定了 1595 个 D. collaris VG 的 VG 特异性基因和 1461 个 C. vestalis VG 的 VG 特异性基因。总共鉴定出 444 个和 513 个编码潜在分泌蛋白的基因,并分别将其定义为 D. collaris VG 和 C. vestalis VG 中的假定毒液基因。两种蜂的假定毒液基因之间没有明显的相似性或趋同。与 C. vestalis VG 相比,D. collaris VG 预测出更多的毒液基因,尤其是水解酶编码基因。假定毒液基因的类型和数量的差异揭示了不同的毒液功能。