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. 2022 Sep 23;12(10):1353. doi: 10.3390/biom12101353

Table 2.

Prediction of the Levels of Fecal–Oral and Respiratory Transmission Potentials using PIDM and PIDN Values as Grouped by Categories. Data pertaining to COVID-19-related bat-CoVs from Laos have been added. (Taken in part from Biomolecules. 2022;12(5). © 2022 Goh et al, Published by MDPI AG, Open access under CC BY-NC-ND license. This is an Open Access article which permits unrestricted non-commercial use, provided the original work is properly cited. [21]).

Coronavirus PIDM UniProt(U)
Genbank(G)
Accession Code
(M Proteins) a
PIDN UniProt(U)
Genbank(G)
Accession Code (N) a
Group/Remarks
HCoV-229E 23 P15422 56 P15130 Group A
IBV(Avian) c 10 P69606 56 Q8JMI6 Higher levels of respiratory transmission lower levels of fecal-oral transmission
Bovine 7.8 P69704 53.1 Q8V432(U) Group B
PEDV (Porcine) c 8 P59771(U) 51.7 Q07499(U) Intermediate levels of respiratory and fecal-oral transmission
Canine (Resp.) 7 A3E2F6(U) 50.5 A3E2F7(U)
HCoV-OC43 7 Q4VID2(U) 51 P33469(U)
SARS-CoV-1 8.6 P59596(U) 50.2 P59595(U)
HCoV-NL63 11 Q6Q1R9(U) 49 Q6Q1R8(U)
Bats b 11.2 + 5.3 A3EXD6(U) 47.7 + 0.9 Q3LZX4(U)
MHV(Murine) c 8 Q9JEB4(U) 46.8 P03416(U) Group C
MERS-CoV 9.1 K0BU37(U) 44.3 K0BVN3(U) Lower levels of respiratory transmission higher levels of fecal-oral transmission
TGEV(Porcine) c 14 P09175(U) 42.41 P04134(U)
Canine (Ent.) 8 B8RIR2(U) 40 Q04700(U)
HCoV-HKU1 d 4.5 Q14EA7(U) 37.4 Q0ZME3(U)
SARS-CoV-2 Group D
[Wuhan] 5.9 YP009724393(G) 48.2 YP009724397(G) High Respiratory and Fecal-oral
Transmission Potentials
[Delta] 5.9 QUX81285(G) 47.1 + 0.5 QYM89845(G)
[Omicron] 5.4 UFO59282(G) 44.8 UFO692871(G)
Pangolin-CoV e 5.6 + 0.9 QIA428617(G) 46.6 + 1.6 QIA48630(G)
Rabbit-CoV 5.7 H9AA37(U) 52.2 6 e H9AA59(U)
RaTG13 4.1 QHT63303(G) 48.5 QHR63308(G)
Laotian Bat-CoV 6.0 + 0.2 48.3 + 0.2
[Banal-52 6.3 UAY13220.1 48.2 UAY13225.1
[Banal-103] 5.9 UAY13232.1 48.5 UAY13257.1
[Banal0236] 4.1 UAY13256.1 48.5 UAY1326.1

a UniProt (U): [https://www.uniProt.org, access on 23 August 2022]; GenBank-NCBI (G): [https://www.ncbi.nlm.nih.gov/protein, access on 23 August 2022]. b Summary figures on bats. Further details on the bat samples can be found in Table 2. Four out of five bat-CoVs are in group B. High standard deviations are seen for PIDN and PIDM values as denoted by “±”. c MHV (murine hepatitis virus), IBV (infectious bronchitis virus), PEDV (porcine epidemic diarrhea virus, TGEV (transmissible gastroenteritis virus). d HCoV-HKU1 has one of the lowest PIDM, which could qualify it for group D, but its PIDN is also abnormally low. Much is still not understood about HCoV-HKU1 [50,51]. For these reasons, HCoV-HKU1 is left in group C. e Details on the known existing pangolin-CoVs can be found in Table 3. Standard deviation is denoted by “±”.