PMC:7605337 / 21678-22583 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7605337","sourcedb":"PMC","sourceid":"7605337","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7605337","text":"Since the extended loop (residues 449 to 510 shown in Figure 1B from α4 to α5) of the RBD makes all contacts with ACE2, the RMSD was computed by also fitting to the Cα atoms of this region (Figure S2). The extended loop in nCOV-2019 is very stable with less deviation (RMSD = 0.86 ± 0.017 Å) from the crystal structure compared to SARS-COV having an RMSD of 2.79 ± 0.05 Å. Few of the mutants show an increase in the loop RMSD during the simulation. In mutants N487A and Y449A the loop RMSD jumps to a value of about 1.95 ± 0.12 Å and 1.94 ± 0.24 Å, respectively, after about 200 ns of simulation. Mutants G447A and E484A show a loop RMSD values of 2.22 ± 0.03 Å and 1.96 ± 0.02 Å during the last 100 ns of simulation. Other mutants showed a stable extended loop (observed in loop RMSD) during simulation. The stability of extended loop for mutant systems confirms the high tolerance of this region of 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