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GeneMedi pseudotype virus (pseudovirus) of SARS-COV-2 (2019nCOV) Spike-N501Y mutation


SARS-COV-2 (2019nCOV) variant-N501Y mutation of Spike protein & ACE2 competition binding assay for efficacy evaluation of COVID-19 vaccines and therapeutic antibodies

GeneMedi codon-optimized spike mammalian expression vector for SARS-COV-2 (2019nCOV) spike-N501Y mutation

SARS-CoV-2 spike-N501Y mutation

The world is in midst of the COVID-19 pandemic caused by SARS-CoV-2 (2019nCoV) infection. The Spike protein (S-protein) of SARS-CoV-2 (2019nCoV) mediates receptor (ACE2) binding and cell entry and is the dominant target of the immune system. Most mutations and deletions of SARS-CoV-2 occur in the coronavirus spike protein. Spike position N501, one of the key contact residues in the receptor-binding domain (RBD), and experimental data suggest mutation N501Y can increase ACE2 receptor affinity (Starr et al. 2020). N501Y has also been associated with increased infectivity and virulence in a mouse model (Gu et al. 2020).

Recently a novel SARS-COV-2 (2019nCOV) lineage, the B.1.1.7 lineage, with serials of site mutation, shows stronger infection ability in the UK. In SARS-COV-2 B.1.1.7 lineage, most mutations and deletions occur in the coronavirus spike protein. These mutantions also include SARS-CoV-2 spike- mutation. N501Y mutation is also found in the South Africa 501Y.V2 lineage.

Reference:
1 Gu, Hongjing, Qi Chen, Guan Yang, Lei He, Hang Fan, Yong-Qiang Deng, Yanxiao Wang, et al. 2020. “Adaptation of SARS-CoV-2 in BALB/c Mice for Testing Vaccine Efficacy.” Science 369 (6511): 1603–7.
2 Starr, Tyler N., Allison J. Greaney, Sarah K. Hilton, Daniel Ellis, Katharine H. D. Crawford, Adam S. Dingens, Mary Jane Navarro, et al. 2020. “Deep Mutational Scanning of SARS-CoV-2 Receptor Binding Domain Reveals Constraints on Folding and ACE2 Binding.” Cell 182 (5): 1295–1310.e20.




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