Polymorphisms in the S1 spike glycoprotein of Arkansas-type infectious bronchitis virus (IBV) show differential binding to host tissues and altered antigenicity.
Polymorphisms in the S1 spike glycoprotein of Arkansas-type infectious bronchitis virus (IBV) show differential binding to host tissues and altered antigenicity.
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DOI:
10.1016/j.virol.2016.08.030
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发表时间:
2016-11
期刊:
影响因子:
3.7
通讯作者:
Jordan B
中科院分区:
文献类型:
--
作者:
Leyson C;França M;Jackwood M;Jordan B
Sequencing avian infectious bronchitis virus spike genes re-isolated from vaccinated chicks revealed that many sequence changes are found on the S1 spike gene. In the ArkDPI strain, Y43H and ∆344 are the two most common changes observed. This study aims to examine the roles of Y43H and ∆344 in selection in vivo. Using recombinant ArkDPI S1 proteins, we conducted binding assays on chicken tracheas and embryonic chorioallantoic membrane (CAM). Protein histochemistry showed that the Y43H change allows for enhanced binding to trachea, whereas the ArkDPI S1 spike with H43 alone was able to bind CAM. Using Western blot under denaturing conditions, ArkDPI serotype-specific sera did not bind to S1 proteins with ∆344, suggesting that ∆344 alters antigenicity of S1. These findings are important because they propose that specific changes in S1 enhances virus fitness by more effective binding to host tissues (Y43H) and by evading a vaccine-induced antibody response (∆344). Binding behaviors of recombinant IBV ArkDPI vaccine S1 proteins are examined. Mutation Y43H enhances binding to mature tracheal tissue but not embryonic tissue. A ∆344 mutation alters epitopes on S1 preventing antibody binding. These two mutations enhance the vaccine viruses' overall fitness in chickens.
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影响因子:
5
作者:
Cavanagh D;Davis PJ;Mockett AP
通讯作者:
Mockett AP
影响因子:
3.7
作者:
Promkuntod N;van Eijndhoven RE;de Vrieze G;Gröne A;Verheije MH
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Verheije MH
影响因子:
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作者:
KOCH, G;HARTOG, L;VANROOZELAAR, DJ
通讯作者:
VANROOZELAAR, DJ
影响因子:
56.9
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HOLLAND, J;SPINDLER, K;VANDEPOL, S
通讯作者:
VANDEPOL, S
影响因子:
1.4
作者:
GELB, J;CLOUD, SS
通讯作者:
CLOUD, SS