Molecular characterization, mRNA gene expression, and antimicrobial activity of 2 new cathelicidin genes in goose

文献类型： 外文期刊

第一作者： Xiao, Yingping

作者： Xiao, Yingping;Lyu, Wentao;Yang, Hua;Xu, Xiaoqin;Zhou, Caiquan;Zhang, Long;Lu, Lizhi

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关键词： cathelicidin; goose; gene expression; phylogenetic analysis; antimicrobial activity

期刊名称：POULTRY SCIENCE （ 影响因子：3.352； 五年影响因子：3.679 ）

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年卷期： 2020 年 99 卷 6 期

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收录情况： SCI

摘要： Cathelicidins represent a major group of host defense peptides (HDPs) that share a highly conserved cathelin-like domain. In birds, this gene family has been identified in many species. However, no information was available in the goose until now. In this study, we present the molecular characterization of 2 goose cathelicidin genes, namely goose CATH2 and goose CATH3, for the first time. The complete cDNA of goose CATH2 and goose CATH3 were 571 bp and 573 bp in length, respectively, and the deduced amino acid sequences exhibited high similarity with other avian cathelicidins. Furthermore, evolutionary analyses indicated that all known cathelicidins form 3 distinct clusters from reptiles, while the oldest cathelicidin member, which is known as CATHB1, is very likely absent in the goose genome. Meanwhile, highly expressed goose CATH2 and goose CATH3 were also observed in primary and secondary lymphoid tissues, same as the observations in other avian species. In addition, chemically synthesized mature peptides of the 2 cathelicidins exerted optimal antimicrobial abilities to a range of gram-negative and gram-positive bacteria. The discovery and characterization of goose cathelicidins complete the knowledge for goose HDPs and might contribute to understanding the evolution of avian cathelicidins as well as for the development of antibacterial agents.

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