id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-252980-1e28zj1d	Zhang, Jiahao	Insights into the cross-species evolution of 2019 novel coronavirus	2020-03-04		.txt	text/plain	1045	75	62	5 Although humans and bats live in different environments, some wildlife species were susceptible to the novel coronaviruses in nature, highlighting that the need of tracing its origin of SARS-CoV-2 in wild animals. The similarity analysis of SARS-CoV-2 and the animal-origin coronaviruses demonstrated that recombination events were likely to occur in bat-and pangolin-origin coronaviruses (Supplementary Figure S1) . Although the S amino acid identities of pangolin-origin coronavirus exhibited lower amino acid identities with bat/RaTG13, it was noteworthy that six amino acids associated with the receptor binding preference of human receptor angiotensin converting enzyme II-464 L, 495F, 502Q, 503S, 510 N, and 514Y (SARS-CoV-2 numbering)-in the pangolin/1 coronavirus were the same as that of SARS-CoV-2 ( Fig. 2 ), but were distinct from that of the bat-origin coronaviruses. Besides, the PRRA-motif insertion was occurred in the S1/S2 junction of SARS-CoV-2; however, the PRRA-motif insertion in the pangolin-and bat-origin coronaviruses was missing (Supplementary Figure S4 ), suggesting that the convergent cross-species evolution of SARS-CoV-2-related coronaviruses. Discovery of a rich gene pool of bat SARS-related coronaviruses provides new insights into the origin of SARS coronavirus	./cache/cord-252980-1e28zj1d.txt	./txt/cord-252980-1e28zj1d.txt