Table 2.
Comparison of pairwise aminoacid identity and similarity of spike glycoproteins of SARS-CoV and other coronaviruses
| Group and virus | Host | Main disease |
Identity (%) |
Similarity (%) |
||||
|---|---|---|---|---|---|---|---|---|
| S protein | HR1 | HR2 | S protein | HR1 | HR2 | |||
| G1 | ||||||||
| HCoV-229E | Human being | Respiratory infection | 22·7 | 44·1 | 24·6 | 43·3 | 66·2 | 54·1 |
| PRCoV | Pig | Respiratory infection | 22·4 | 50·8 | 21·3 | 42·0 | 68·9 | 50·8 |
| FIPV | Cat | Infectious peritonitis | 20·7 | 43·4 | 23·8 | 41·6 | 64·0 | 47·6 |
| PEDV | Pig | Enteritis | 20·5 | 44·1 | 24·6 | 39·8 | 64·0 | 52·5 |
| CCoV |
Dog |
Enteritis |
20·4 |
44·9 |
21·3 |
40·2 |
62·5 |
50·8 |
| G2 | ||||||||
| MHV | Mouse | Hepatitis, enteritis, encephalitis | 30·2 | 54·9 | 40·0 | 51·7 | 76·2 | 74·0 |
| HCoV-OC43 | Human being | Respiratory infection | 27·2 | 55·7 | 42·0 | 45·9 | 76·2 | 70·0 |
| BCoV | Cattle | Enteritis | 27·0 | 56·6 | 42·0 | 46·0 | 75·4 | 70·0 |
| HEV |
Pig |
Encephalomyelitis, respiratory infection |
26·7 |
54·9 |
42·0 |
45·8 |
75·4 |
70·0 |
| G3 | ||||||||
| IBV |
Chicken |
Respiratory infection |
23·2 |
43·4 |
40·0 |
40·9 |
68·9 |
62·0 |
| Average | .. | .. | 24·1 | 49·3 | 32·2 | 43·7 | 69·8 | 60·2 |
HCoV=human coronavirus; PRCoV=porcine respiratory coronavirus; FIPV=feline infectious peritonitis virus; PEDV=porcine epidemic diarrhoea virus; CCoV=canine coronavirus; MHV=murine hepatitis virus; BCoV=bovine coronavirus; HEV=hepatitis E virus; IBV=infectious bronchitis virus.