[논문]Spike Protein Fusion Peptide and Feline Coronavirus Virulence

Chang, Hui-Wen; Egberink, Herman F.; Halpin, Rebecca; Spiro, David J.; Rottier, Peter J.M.

doi:10.3201/eid1807.120143

Spike Protein Fusion Peptide and Feline Coronavirus Virulence 원문보기

Emerging infectious diseases, v.18 no.7, 2012년, pp.1089 - 1095

Chang, Hui-Wen , Egberink, Herman F. , Halpin, Rebecca , Spiro, David J. , Rottier, Peter J.M.

Abstract ▼ AI-Helper

Mutations can occur erratically and accompany tropism changes, resulting in unpredictable new diseases.Coronaviruses are well known for their potential to change their host or tissue tropism, resulting in unpredictable new diseases and changes in pathogenicity; severe acute respiratory syndrome and feline coronaviruses, respectively, are the most recognized examples. Feline coronaviruses occur as 2 pathotypes: nonvirulent feline enteric coronaviruses (FECVs), which replicate in intestinal epithelium cells, and lethal feline infectious peritonitis viruses (FIPVs), which replicate in macrophages. Evidence indicates that FIPV originates from FECV by mutation, but consistent distinguishing differences have not been established. We sequenced the full genome of 11 viruses of each pathotype and then focused on the single most distinctive site by additionally sequencing hundreds of viruses in that region. As a result, we identified 2 alternative amino acid differences in the putative fusion peptide of the spike protein that together distinguish FIPV from FECV in >95% of cases. By these and perhaps other mutations, the virus apparently acquires its macrophage tropism and spreads systemically.

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참고문헌 (28)

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Spike Protein Fusion Peptide and Feline Coronavirus Virulence 원문보기

Abstract ▼ AI-Helper

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