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Coronavirus has been determined to be the cause of the recent outbreak of severe acute respiratory syndrome (SARS). Human coronavirus 229E had been studied well and its receptor-binding domain was restricted to aa417—547 of S protein. However, this region has no homology with the newly separated SARS-associated virus (Hong Kong isolate CUHK-W1). Then we analyzed the phylogenesis of S1 subunit of the coronavirus spike protein (SARS-associated virus, Hong Kong isolate CUHK-W1). Interestingly, the highest homology between murine hepatitis virus (MHV) and SARS-associated coronavirus was found. And the important sites (aa62—65 and aa214—216) on the spike protein of MHV with receptor-binding capacity were highly conservative in comparison with the newly separated SARS-asso- ciated virus (the corresponding sites are aa51—54 and aa195—197). These results from bioinformatics analysis might help us to study the receptor-binding sites of SARS-associ- ated virus and the mechanism of the virus entry into the target cell, and design antiviral drugs and potent vaccines.
Coronavirus has been determined to be the cause of the recent outbreak of severe acute respiratory syndrome (SARS). Human coronavirus 229E had been well and its receptor-binding domain was restricted to aa 417-547 of S protein. However, this region has no homology with the newly isolated SARS-associated virus (Hong Kong isolate CUHK-W1). Then we analyzed the phylogenesis of S1 subunit of the coronavirus spike protein (SARS-associated virus, Hong Kong isolate CUHK-W1). Interestingly, the highest homology Between the murine hepatitis virus (MHV) and SARS-associated coronavirus was found. And the important sites (aa62-65 and aa 214-216) on the spike protein of MHV with receptor-binding capacity were highly conservative in comparison with the newly established SARS- These results from bioinformatics analysis might help us to study the receptor-binding sites of SARS-associated-ated virus and the mechanism of the virus entry into the target cell, and design antiviral drugs and potent vaccines.