Feline coronavirus type II strains 79-1683 and 79-1146 originate from a double recombination between feline coronavirus type I and canine coronavirus

被引:334
作者
Herrewegh, AAPM [1 ]
Smeenk, I [1 ]
Horzinek, MC [1 ]
Rottier, PJM [1 ]
de Groot, RJ [1 ]
机构
[1] Univ Utrecht, Dept Immunol & Infect Dis, Virol Unit, Fac Vet Med, NL-3508 TD Utrecht, Netherlands
关键词
D O I
10.1128/JVI.72.5.4508-4514.1998
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Recent evidence suggests that the type II feline coronavirus (FCoV) strains 79-1146 and 79-1683 have arisen from a homologous RNA recombination event between FCoV type I and canine coronavirus (CCV). In both cases, the template switch apparently took place between the S and M genes, giving rise to recombinant viruses which encode a CCV-like S protein and the M, N, 7a, and 7b proteins of FCoV type I (K. Motowaka, T. Hohdatsu, H. Hashimoto, and H. Koyama, Microbiol. Immunol. 40:425-433, 1996; H. Vennema, A. Poland, K. Floyd Hawkins, and N. C. Pedersen, Feline Pract. 23:40-44, 1995). In the present study, we have looked for additional FCoV-CCV recombination sites. Four regions in the pol gene were selected for comparative sequence analysis of the type II FCoV strains 79-1683 and 79-1146, the type I FCoV strains TN406 and UCD1, the CCV strain K378, and the TGEV strain Purdue. Our data show that the type II FCoVs have arisen from double recombination events: additional crossover sites were mapped in the ORF1ab frameshifting region of strain 79-1683 and in the 5' half of ORF1b of strain 79-1146.
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页码:4508 / 4514
页数:7
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