Genome Sequencing of Two Pseudorabies Virus Variants and Amino Acid Mutation Analysis of Major Protective Antigen

doi:10.15933/j.cnki.1004-3268.2021.08.017

Journal of Henan Agricultural Sciences ›› 2021, Vol. 50 ›› Issue (8): 146-153.DOI: 10.15933/j.cnki.1004-3268.2021.08.017

• Animal Science Veterinary Medicine • Previous Articles Next Articles

Genome Sequencing of Two Pseudorabies Virus Variants and Amino Acid Mutation Analysis of Major Protective Antigen

GUO Zhenhua¹，XING Guangxu¹，WENG Maoyang¹，JIN Qianyue¹，QIAO Songlin¹，ZHANG Gaiping^1,2,3

（1.Key Laboratory of Animal Immunology，Henan Academy of Agricultural Sciences，Zhengzhou 450002，China；2.College of Veterinary Medicine，Henan Agricultural University，Zhengzhou 450002，China；3. Jiangsu Co‑innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses，Yangzhou 225009，China）

Received:2021-02-01 Published:2021-08-15 Online:2021-09-17

2 株伪狂犬病毒变异株全基因组测序及主要保护性抗原氨基酸变异分析

郭振华¹，邢广旭¹，翁茂洋¹，金前跃¹，乔松林¹，张改平^1,2,3

（1.河南省农业科学院动物免疫学重点实验室，河南郑州450002；2.河南农业大学动物医学院，河南郑州450002；3.江苏高校动物重要疫病与人兽共患病防控协同创新中心，江苏扬州225009）

通讯作者: 张改平（1960-），男，河南内黄人，中国工程院院士，研究员，博士，主要从事动物免疫学及疫病快速检测技术研究。E-mail：zhanggaip@126.com
作者简介:郭振华（1984-），男，河南新乡人，副研究员，博士，主要从事猪病毒病病原学及分子流行病学研究。E-mail：gzhuavet@163.com
基金资助:
河南省农业科学院优秀青年科技基金项目（2020YQ15）；国家自然科学基金青年科学基金项目（31902281）；河南省重点研发
与推广专项（202102110248）

Abstract

Abstract: To investigate the genetic variations of pseudorabies virus（PRV）prevalent strains in China，we sequenced the full‑length genomes of two PRV（HeNLH/2017 and HeNZM/2017）isolated strains.Then，we conducted bioinformatics analyses，including phylogenetic analysis and amino acid mutation assay.The results showed that the length of genome was about 143 kb with a very high GC content of 73. 8%.The whole genomic sequences displayed 95. 28%—95. 37%，98. 70%—98. 80% and 98. 90%—99. 42%nucleotide homology with those of Bartha，classical PRV strains（Ea and Fa）and PRV variants（HeN1 and HN1201），respectively. Phylogenetic analysis indicated that the two PRV strains belonged to Genotype 2. 2 and were very close to the PRV variants. Furthermore，compared with the Bartha strain，extensive amino acid mutations were indentified in the major protective antigens of gB，gC and gD among the two PRV isolates and other PRV prevalent strains in China. They contained deletion of ⁷⁵SPG⁷⁷ for gB，insertion of ⁶³AAASTPA⁶⁹ for gC and ²⁷⁸S/RPRP²⁸¹ for gD. However，the gB，gC and gD were still very conserved between PRV variants（including the two PRV isolates）and early prevalent strains（Ea and
Fa），except that only a few amino acid substitutions were found.

Key words: Pseudorabies virus, Genome sequencing, Identity analysis, Genetic evolution, Amino acid mutation

摘要： 为了解我国伪狂犬病毒（Pseudorabies virus，PRV）流行毒株遗传变异情况，对分离的2 株PRV（HeNLH/2017和HeNZM/2017）全基因组序列进行测定，并利用生物信息学方法进一步分析其遗传进化特征和主要保护性抗原的遗传变异情况。基因组测序结果显示，分离的2株PRV基因组全长约为143 kb，GC含量约为73.8%。遗传进化分析显示，2株PRV毒株与Bartha株、我国早期流行毒株Ea和Fa株以及2011年以来流行的变异毒株（HeN1和HN1201）核苷酸同源性分别为95.28%~95.37%、98.70%~98.80%和98.90%~99.42%。系统进化树显示，2株PRV分离株均属于基因2.2亚型（Genotype 2.2），且与变异毒株遗传关系更近。PRV主要抗原gB、gC和gD蛋白的氨基酸变异分析显示，与Bartha株相比，2株PRV 分离株以及我国其他PRV 流行毒株均发生了广泛的氨基酸变异，且有gB⁷⁵SPG⁷⁷的缺失、gC⁶³AAASTPA⁶⁹和gD²⁷⁸S/RPRP²⁸¹ 的插入；与我国早期流行毒株Ea和Fa相比，2株PRV分离株以及我国2011年以来流行的变异毒株的gB、gC和gD蛋白氨基酸序列同源性很高，仅在个别位点发生了突变。

关键词: 伪狂犬病毒, 基因组测序, 同源性分析, 遗传进化, 氨基酸变异

CLC Number:

S855.3

GUO Zhenhua, XING Guangxu, WENG Maoyang, JIN Qianyue, QIAO Songlin, ZHANG Gaiping. Genome Sequencing of Two Pseudorabies Virus Variants and Amino Acid Mutation Analysis of Major Protective Antigen[J]. Journal of Henan Agricultural Sciences, 2021, 50(8): 146-153.

郭振华, 邢广旭, 翁茂洋, 金前跃, 乔松林, 张改平. 2 株伪狂犬病毒变异株全基因组测序及主要保护性抗原氨基酸变异分析[J]. 河南农业科学, 2021, 50(8): 146-153.

Figures/Tables 7

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Genome Sequencing of Two Pseudorabies Virus Variants and Amino Acid Mutation Analysis of Major Protective Antigen

2 株伪狂犬病毒变异株全基因组测序及主要保护性抗原氨基酸变异分析

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