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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2021 ; 12 (1): 3431 Nephropedia Template TP
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A versatile reverse genetics platform for SARS-CoV-2 and other positive-strand RNA viruses #MMPMID34103499
Amarilla AA; Sng JDJ; Parry R; Deerain JM; Potter JR; Setoh YX; Rawle DJ; Le TT; Modhiran N; Wang X; Peng NYG; Torres FJ; Pyke A; Harrison JJ; Freney ME; Liang B; McMillan CLD; Cheung STM; Guevara DJDC; Hardy JM; Bettington M; Muller DA; Coulibaly F; Moore F; Hall RA; Young PR; Mackenzie JM; Hobson-Peters J; Suhrbier A; Watterson D; Khromykh AA
Nat Commun 2021[Jun]; 12 (1): 3431 PMID34103499show ga
The current COVID-19 pandemic is caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). We demonstrate that despite the large size of the viral RNA genome (~30 kb), infectious full-length cDNA is readily assembled in vitro by a circular polymerase extension reaction (CPER) methodology without the need for technically demanding intermediate steps. Overlapping cDNA fragments are generated from viral RNA and assembled together with a linker fragment containing CMV promoter into a circular full-length viral cDNA in a single reaction. Transfection of the circular cDNA into mammalian cells results in the recovery of infectious SARS-CoV-2 virus that exhibits properties comparable to the parental virus in vitro and in vivo. CPER is also used to generate insect-specific Casuarina virus with ~20 kb genome and the human pathogens Ross River virus (Alphavirus) and Norovirus (Calicivirus), with the latter from a clinical sample. Additionally, reporter and mutant viruses are generated and employed to study virus replication and virus-receptor interactions.