Comparison of SARS-CoV-2 Nsp113-127 to SARS-CoV Nsp1
(A) Alignment of residues 13–127 of Nsp1 with conserved residues highlighted in black.
(B) Ribbon representation of SARS-CoV-2 (PDB: 7K3N) and SARS-CoV (PDB: 2HSX) Nsp113-127. β4 (shown in cartoon representation) is extended in the SARS-CoV-2 structure allowing for H-bonding with and formation of β5, which is absent in the SARS-CoV Nsp1 structure. The loop region (and equivalent in SARS-CoV Nsp1) stabilized through interaction between β4 and β5 is colored in purple.
(C) Comparison of electrostatic surface potential of SARS-CoV-2 and SARS-CoV Nsp113-127.