Id |
Subject |
Object |
Predicate |
Lexical cue |
T21 |
0-41 |
Sentence |
denotes |
Characteristics of 2019 novel coronavirus |
T22 |
42-186 |
Sentence |
denotes |
Coronaviruses belong to the family of Coronaviridae, of the order Nidovirales, comprising large, single, plus-stranded RNA as their genome13,14. |
T23 |
187-274 |
Sentence |
denotes |
Currently, there are four genera of coronaviruses: α-CoV, β-CoV, γ-CoV, and δ-CoV15,16. |
T24 |
275-358 |
Sentence |
denotes |
Most of the coronavirus can cause the infectious diseases in human and vertebrates. |
T25 |
359-532 |
Sentence |
denotes |
The α-CoV and β-CoV mainly infect the respiratory, gastrointestinal, and central nervous system of humans and mammals, while γ-CoV and δ-CoV mainly infect the birds13,17–19. |
T26 |
533-796 |
Sentence |
denotes |
Usually, several members of the coronavirus cause mild respiratory disease in humans; however, SARS-CoV and the Middle East respiratory syndrome coronavirus (MERS-CoV) explored in 2002–2003 and in 2012, respectively, caused fatal severe respiratory diseases20–22. |
T27 |
797-848 |
Sentence |
denotes |
The SARS-CoV and MERS-CoV belong to the β-CoV23,24. |
T28 |
849-973 |
Sentence |
denotes |
2019-nCoV explored in Wuhan also belongs to the β-CoV according to the phylogenetic analysis based on the viral genome10,11. |
T29 |
974-1216 |
Sentence |
denotes |
Although the nucleotide sequence similarity is less than 80% between 2019-nCoV and SARS-CoV (about 79%) or MERS-CoV (about 50%), 2019-nCoV can also cause the fetal infection and spread more faster than the two other coronaviruses7,9,11,25–27. |
T30 |
1217-1478 |
Sentence |
denotes |
The genome nucleotide sequence identity between a coronavirus (BatCoV RaTG13) detected in the bat Rhinolophus affinis from Yunnan Province, China, and 2019-nCoV, was 96.2%, indicating that the natural host of 2019-nCoV may also be the Rhinolophus affinis bat11. |
T31 |
1479-1591 |
Sentence |
denotes |
However, the differences may also suggest that there is an or more intermediate hosts between the bat and human. |
T32 |
1592-1765 |
Sentence |
denotes |
A research team from the South China Agricultural University has invested more than 1 000 metagenomic samples from pangolins, and found that 70% pangolins contained β-CoV28. |
T33 |
1766-2008 |
Sentence |
denotes |
One of the coronaviruses they isolated from the pangolins comprised a genome that was very similar with that from 2019-nCoV, and the genome sequence similarity was 99%, indicating that the pangolin may be the intermediate host of 2019-nCoV29. |
T34 |
2009-2325 |
Sentence |
denotes |
2019-nCoV possessed the typical coronavirus structure with the “spike protein” in the membrane envelope30, and also expressed other polyproteins, nucleoproteins, and membrane proteins, such as RNA polymerase, 3-chymotrypsin-like protease, papain-like protease, helicase, glycoprotein, and accessory proteins10,11,30. |
T35 |
2326-2444 |
Sentence |
denotes |
The S protein from coronavirus can bind to the receptors of the host to facilitate viral entry into target cells31,32. |
T36 |
2445-2798 |
Sentence |
denotes |
Although there are four amino acid variations of S protein between 2019-nCoV and SARS-CoV, 2019-nCoV can also bind to the human angiotensin-converting enzyme 2 (ACE2), the same host receptor for SARS-CoV, as 2019-nCoV can bind to the ACE2 receptor from the cells from human, bat, civet cat, and pig, but it cannot bind to the cells without ACE211,33–35. |
T37 |
2799-3026 |
Sentence |
denotes |
A recombinant ACE2-Ig antibody, a SARS-CoV-specific human monoclonal antibody, and the serum from a convalescent SARS-CoV-infected patient, which can neutralize 2019-nCoV, confirmed ACE2 as the host receptor for 2019-nCoV36–39. |
T38 |
3027-3192 |
Sentence |
denotes |
The high affinity between ACE2 and 2019-nCoV S protein also suggested that the population with higher expression of ACE2 might be more susceptible to 2019-nCoV40,41. |
T39 |
3193-3362 |
Sentence |
denotes |
The cellular serine protease TMPRSS2 also contributed to the S-protein priming of 2019-nCoV, indicating that the TMPRSS2 inhibitor might constitute a treatment option36. |