数字农科院2.0

Characterization And Functional Analysis Of Chicken Apobec4

文献类型： 外文期刊

作者： Shi, MY; Tan, L; Zhang, YD; Meng, CC; Wang, W; Sun, YJ; Song, CP; Liu, WW; Liao, Y; Yu, SQ; Ren, T; Ding, Z; Liu, XF; Qiu, XS; Ding, C

作者机构：

关键词： Apobecs; Chapobec4; Newcastle Disease Virus; Antiviral Effect

期刊名称： DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY

ISSN： 0145-305X

年卷期： 2020 年 106 卷

页码：

收录情况： JCR（2021版）

摘要： The APOBEC proteins play significant roles in the innate and adaptive immune system, probably due to their deaminase activities. Because APOBEC1 (A1) and APOBEC3 (A3) are absent in the chicken genome, we were interested in determining whether chicken APOBEC4 (A4) possessed more complex functions than its mammalian homologs. In this study, chicken A4 (chA4) mRNA was identified and cloned for the first time. Based on bioinformatics analyses, the conserved zinc-coordinating motif (HXE ... PC(X)(2-6)C) was identified on the surface of chA4 and contained highly conserved His97, Glu99, Pro130, Cys131 and Cys138 active sites. The highest expression levels of constitutive chA4 were detected in primary lymphocytes and bursa of Fabricius. Newcastle Disease (ND) is one of the most serious infectious diseases in birds, causing major economic losses to the poultry industry. In vitro, Newcastle Disease Virus (NDV) early infection induced significant increases in chA4 expression in the chicken B cell line, DT40, the macrophage cell line, HD11 and the CD4(+) T cell line, MSB-1, but not the fibroblast cell line, DF-1. In vivo, the expression levels of chA4 were up-regulated in several tissues from NDV-infected chickens, especially the thymus, testicles, duodenum and kidney. The high level expression of exogenous chA4 displayed inhibitory effects on NDV and reduced viral RNA in infected cells. Taken together, these data demonstrate that chA4 is involved in the chicken immune system and may play important roles in host antiviral responses.

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