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. 2020 Nov 3;10(4):207. doi: 10.3390/jpm10040207

Figure 4.

Figure 4

Local stability of the N-terminal domain (NTD) probed by proteolysis with thermolysin. (A) Location of mutated residues regarding the thermolysin cleavage site (TCS). The minimal distance between the mutated residue and the TCS backbone (Ser72-Val73) is also indicated (using the structure with PDB code 2F1O). (B) Linear dependence of apparent rate constants (kobs) on protease concentration. The slopes provide the values of the second-order rate constants kprot. (C,D) Values of kprot for the NQO1 variants (C) and the effect of mutations on the local stability (D) as ΔΔGprot. Note that a positive value of ΔΔGprot indicates a destabilizing effect.