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The recent outbreak of novel coronavirus (SARS-CoV-2 or 2019-nCoV) and its worldwide spread is posing one
of the major threats to human health and the world economy. It has been suggested that SARS-CoV-2 is similar to SARSCoV based on the comparison of the genome sequence. Despite the genomic similarity between SARS-CoV-2 and SARSCoV, the spike glycoprotein and receptor binding domain in SARS-CoV-2 shows the considerable difference compared to
SARS-CoV, due to the presence of several point mutations. The analysis of receptor binding domain (RBD) from recently
published 3D structures of spike glycoprotein of SARS-CoV-2 (Yan, R., et al. (2020); Wrapp, D., et al. (2020); Walls, A.
C., et al. (2020)) highlights the contribution of a few key point mutations in RBD of spike glycoprotein and molecular basis
of its efficient binding with human angiotensin-converting enzyme 2 (ACE2).