Phylogeny of antigenic variants of avian coronavirus IBV.

Phylogeny of antigenic variants of avian coronavirus IBV.
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DOI:
10.1016/0042-6822(89)90058-5
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发表时间:
1989-03
期刊:
影响因子:
3.7
通讯作者:
van der Zeijst BA
van der Zeijst BA
中科院分区:
医学3区
文献类型:
--
作者:
Kusters JG;Niesters HG;Lenstra JA;Horzinek MC;van der Zeijst BA

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测定了禽冠状病毒传染性支气管炎病毒(IBV)四种不同血清学毒株的聚合体S1蛋白序列。S1蛋白被认为含有血清型特异性中和表位,是抗原变异的主要目标。与先前发表的三个菌株序列比对表明,在545个氨基酸残基中,只有243个是保守的。替换的聚类表明,大多数血清型决定因素位于S1的前300个氨基酸残基内。S1序列的系统发育树显示出非常不同的分化率。与基于RNAse-T1指纹图谱的拓扑结构差异表明,部分IBV菌株是通过基因重组产生的。
The sequences of the peplomeric S1 protein of four serologically distinct strains of the infectious bronchitis virus (IBV), an avian coronavirus, have been determined. The S1 protein is thought to contain the serotype-specific neutralization epitopes and to be the main target of antigenic variation. An alignment with sequences of three strains published previously showed that from the 545 amino acid residues only 243 have been conserved. Clustering of substitutions suggests that most serotype determinants are located within the first 300 amino acid residues of S1. A phylogenetic tree of the S1 sequences showed very variable rates of divergence. Differences in topology with a tree based on RNAse-T1 fingerprint data indicate that some of the IBV strains have arisen by genetic recombination.
DOI: 10.1016/0168-1702(88)90039-1
发表时间: 1988-09
期刊: Virus research
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作者:
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