Recombination between North American strains of porcine reproductive and respiratory syndrome virus.

Recombination between North American strains of porcine reproductive and respiratory syndrome virus.
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DOI:
10.1016/s0168-1702(99)00029-5
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发表时间:
1999-05
期刊:
影响因子:
5
通讯作者:
Faaberg KS
Faaberg KS
中科院分区:
医学3区
文献类型:
--
作者:
Yuan S;Nelsen CJ;Murtaugh MP;Schmitt BJ;Faaberg KS

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猪繁殖与呼吸综合征病毒(PRRSV)是一种最近发现的动脉炎病毒猪病原体,已被证明会发生同源重组。 MA-104 细胞与两种培养适应的北美 PRRSV 菌株的共感染产生了含有嵌合 ORF 3 和 ORF 4 蛋白的重组病毒颗粒。对克隆的重组 PCR 产物(包含 15.4 kb 病毒基因组的 1182 个碱基)进行的核苷酸序列分析揭示了 6 个独立的重组事件。重组产物在培养物中持续存在至少三代,表明重组病毒的持续形成、重组病毒与亲本病毒竞争的生长,或两者兼而有之。在分析的 1182 b 片段中,重组频率估计为 <2% 至 10%,这与在冠状病毒中观察到的重组频率相似。还发现了自然存在的野生型病毒之间自然 ORF 5 重组的明显例子,表明重组可能是促进 PRRSV 进化的重要遗传机制。
Porcine reproductive and respiratory syndrome virus (PRRSV), a recently discovered arterivirus swine pathogen, was shown to undergo homologous recombination. Co-infection of MA-104 cells with two culture-adapted North American PRRSV strains resulted in recombinant viral particles containing chimeric ORF 3 and ORF 4 proteins. Nucleotide sequence analysis of cloned recombinant PCR products, encompassing 1182 bases of the 15.4 kb viral genome, revealed six independent recombination events. Recombinant products persisted in culture for at least three passages, indicating continuous formation of recombinant viruses, growth of recombinant viruses in competition with parental viruses, or both. The frequency of recombination was estimated from <2% up to 10% in the 1182 b fragment analyzed, which is similar to recombination frequencies observed in coronaviruses. An apparent example of natural ORF 5 recombination between naturally occurring wild type viruses was also found, indicating that recombination is likely an important genetic mechanism contributing to PRRSV evolution.
DOI: 10.1006/smvy.1996.0046
发表时间: 1996-12
期刊: Seminars in Virology
影响因子: --
作者:
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DOI: 10.1006/viro.1996.0356
发表时间: 1996-07-01
期刊: VIROLOGY
影响因子: 3.7
作者:
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通讯作者: Dea, S
DOI: 10.1128/jvi.73.1.270-280.1999
发表时间: 1999-01-01
影响因子: 5.4
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发表时间: 1988-02-01
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