Analysis of the function of D279N mutation of VP2 of infectious bursal disease virus
文献类型: 外文期刊
第一作者: Qi Xiao-le
作者: Qi Xiao-le;Lu Zhen;Wang Nian;Chen Yu-ming;Zhang Li-zhou;Gao Li;Li Kai;Ren Xian-gang;Wang Yong-qiang;Gao Hong-lei;Gao Yu-long;Wang Xiao-mei;Eterradossi, Nicolas;Wang Xiao-mei
作者机构:
关键词: infectious bursal disease virus (IBDV);residue 279;cell tropism;virulence
期刊名称:JOURNAL OF INTEGRATIVE AGRICULTURE ( 影响因子:2.848; 五年影响因子:2.979 )
ISSN: 2095-3119
年卷期: 2015 年 14 卷 12 期
页码:
收录情况: SCI
摘要: Infectious bursal disease virus (IBDV) is responsible for the highly contagious infectious bursal disease of chickens. Further understanding the gene-function is necessary to design the tailored vaccine. The amino acid residue 279, located on strand P-F of VP2, is one of the three residues that have been reported to be involved in cell-tropism but with some inconsistency. In this study, to further clarify the amino acids involved in the cell tropism of IBDV, a series of mutations about residue 279 were introduced into the VP2 of vvIBDV Gx strain. With the reverse genetic system, we found single mutation of D279N, double mutations of D279N/A284T or Q253H/D279N were not enough to adapt IBDV to chicken embryo fibroblast (CEF) cell. To evaluate whether residue 279 could influence the replication and virulence of IBDV, the virus rGxHT-279 with three mutations (Q253H/D279N/A284T) was rescued and evaluated. Results showed that the mutation of residue 279 in VP2 had no efficient effects on both the replication efficiency in vitro and the virulence to SPF chickens of IBDV. In summary, the results demonstrated that residue 279 of VP2 did not contribute efficiently to cell tropism, replication efficiency, and virulence of IBDV at least in some strains. These findings provided further information for understanding the gene function of IBDV.
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