An Infectious cDNA Clone of SARS-CoV-2

被引:433
作者
Xie, Xuping [1 ]
Muruato, Antonio [1 ,2 ]
Lokugamage, Kumari G. [2 ]
Narayanan, Krishna [2 ]
Zhang, Xianwen [1 ]
Zou, Jing [1 ]
Liu, Jianying [2 ]
Schindewolf, Craig [2 ]
Bopp, Nathen E. [3 ]
Aguilar, Patricia, V [3 ,4 ,5 ]
Plante, Kenneth S. [2 ,4 ]
Weaver, Scott C. [2 ,3 ,4 ,5 ,6 ,7 ,8 ]
Makino, Shinji [2 ,5 ,10 ]
LeDuc, James W. [2 ,9 ]
Menachery, Vineet D. [2 ,3 ,5 ,7 ]
Shi, Pei-Yong [1 ,5 ,8 ,10 ,11 ]
机构
[1] Univ Texas Med Branch, Dept Biochem & Mol Biol, Galveston, TX 77555 USA
[2] Univ Texas Med Branch, Dept Microbiol & Immunol, Galveston, TX 77555 USA
[3] Univ Texas Med Branch, Dept Pathol, Galveston, TX 77555 USA
[4] Univ Texas Med Branch, World Reference Ctr Emerging Viruses & Arboviruse, Galveston, TX 77555 USA
[5] Univ Texas Med Branch, Inst Human Infect & Immun, Galveston, TX 77555 USA
[6] Univ Texas Med Branch, Inst Translat Sci, Galveston, TX 77555 USA
[7] Univ Texas Med Branch, Ctr Biodef & Emerging Infect Dis, Galveston, TX 77555 USA
[8] Univ Texas Med Branch, Sealy Inst Vaccine Sci, Galveston, TX 77555 USA
[9] Univ Texas Med Branch, Galveston Natl Lab, Galveston, TX 77555 USA
[10] Univ Texas Med Branch, Sealy Ctr Struct Biol & Mol Biophys, Galveston, TX 77555 USA
[11] Univ Texas Med Branch, Dept Pharmacol & Toxicol, Galveston, TX 77555 USA
关键词
REVERSE GENETICS; CORONAVIRUS; SARS; EXPRESSION;
D O I
10.1016/j.chom.2020.04.004
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The ongoing pandemic of COVID-19, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), underscores the urgency to develop experimental systems for studying this virus and identifying countermeasures. We report a reverse genetic system for SARS-CoV-2. Seven complimentary DNA (cDNA) fragments spanning the SARS-CoV-2 genome were assembled into a full-genome cDNA. RNA transcribed from the full-genome cDNA was highly infectious after electroporation into cells, producing 2.9 x 10(6) plaque-forming unit (PFU)/mL of virus. Compared with a clinical isolate, the infectious-clone-derived SARS-CoV-2 (icSARS-CoV-2) exhibited similar plaque morphology, viral RNA profile, and replication kinetics. Additionally, icSARS-CoV-2 retained engineered molecular markers and did not acquire other mutations. We generated a stable mNeonGreen SARS-CoV-2 (icSARS-CoV-2-mNG) by introducing this reporter gene into ORF7 of the viral genome. icSARS-CoV-2-mNG was successfully used to evaluate the antiviral activities of interferon (IFN). Collectively, the reverse genetic system and reporter virus provide key reagents to study SARS-CoV-2 and develop countermeasures.
引用
收藏
页码:841 / +
页数:11
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