Genetic characterization of immune adaptor molecule MyD88 in Culex pipiens complex (Diptera: Culicidae) mosquitoes from China
文献类型： 外文期刊
作者： Wang, Xueting 1 ; Zhu, Lilan 1 ; Huo, Caifei 2 ; He, Dan 3 ; Tian, Haifeng 5 ; Fan, Xiaolan 2 ; Lyu, Yongqing 6 ; Li, Yan 2 ;
作者机构： 1.Sichuan Agr Univ, Coll Vet Med, Chengdu, Peoples R China
2.Sichuan Agr Univ, Coll Anim Sci & Technol, Chengdu, Peoples R China
3.Guizhou Univ, Coll Anim Sci, Guiyang, Peoples R China
4.Guizhou Univ, Key Lab Anim Genet Breeding & Reprod Plateau Mount, Minist Educ, Guiyang, Peoples R China
5.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan, Peoples R China
6.First Hosp Kunming, Kunming, Peoples R China
关键词： mosquito; Culex; MyD88; adaptive diversity
期刊名称：JOURNAL OF MEDICAL ENTOMOLOGY （ 影响因子：2.0； 五年影响因子：2.2 ）
ISSN： 0022-2585
年卷期： 2024 年 62 卷 1 期
页码：
收录情况： SCI
摘要： Mosquitoes of the Culex (Cx.) pipiens complex are vectors of severe diseases including West Nile fever by West Nile virus, Japanese encephalitis by Japanese encephalitis virus, and Lymphatic filariasis by filarial nematode Wuchereria bancrofti. As a major portion of mosquito immune system, the Toll pathway implicates in response against infections of mosquito-borne pathogens and biocontrol agents. The genetic diversity of immune-related molecules is expected to be a feasible and effective introduction to expand our knowledge of the mosquito-microbe interplay. However, a comprehensive description is currently lacking regarding the genetic characteristic of the Toll pathway molecules in Cx. pipiens complex mosquitoes. In the present study, genetic changes in Cx. pipiens complex MyD88 (Myeloid differentiation primary response protein 88) were analyzed as a precedent for the Toll pathway molecules in this taxon. MyD88 is a critical adaptor of the pathway transducing signals from TIR-containing receptors to downstream death domain-containing molecules. Our results revealed that adaptive selection has influenced the genetic changes of the molecule, giving rise to acceleration of diversity at a number of amino acid sites. The adaptively selected sites lie in the death domain, intermediate domain, and C-terminal extension. The characteristics of the genetic changes shed insights into the prominent molecular-level structural basis and the involvement strategy of the adaptor in the arms race against exogenous challenges. This finding would be beneficial for further exploration and deeper understanding of the mosquitoes' vectorial capacity and facilitating the effectiveness and sustainability of the biocontrol agents.
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