Table 2. Key Distances (Å) Obtained in QM/MM Optimization and in MD Simulations of MMP-2–APP-IP and MMP-2–APP-IPZnF Complexesa.
Glu2H-Asp6OD2 | Glu2O- Asp6OD2 | Zn2+- Asp6OD2 | Zn2+- Asp6OD1 | Zn2+-His1N | Zn2+-His5N | Zn2+-His11N | ||
---|---|---|---|---|---|---|---|---|
MMP-2-APP-IP | opt | 1.71 | 2.19 | 2.19 | 2.08 | 2.02 | 2.03 | 2.03 |
X-ray | 2.30 | 2.17 | 2.05 | 2.11 | 2.08 | |||
MD | 1.71 (0.15) | 2.53 (0.31) | 2.53 (0.31) | 2.19 (0.26) | 2.03 (0.05) | 2.08 (0.06) | 2.03 (0.05) |
Glu2H-Cys6S | Glu2O- Cys6S | Zn2+- Cys6S | Zn2+- Cys3S | Zn2+-His1N | Zn2+-His5N | Zn2+-His11N | ||
---|---|---|---|---|---|---|---|---|
MMP-2-APP-IPZnF | opt | 2.07 | 3.05 | 2.31 | 2.33 | 2.02 | 3.55 | 2.03 |
MD | 2.10 (0.15) | 3.10 (0.13) | 2.37 (0.09) | 2.37 (0.13) | 2.14 (0.08) | 3.37 (0.29) | 2.11 (0.08) |
Rows with MD data show the mean values and standard deviations (in parentheses).