Table 1. Relative Energies (kilocalories per mole) at Optimized QM or QM/MM Geometries.
SUB-a1 | SUB-a2 | SUB-b1 | SUB-b2 | |
---|---|---|---|---|
C5–C6/C1–O22 conformation | trans/trans | cis/trans | trans/cis | cis/cis |
Gas Phase, QM Energy | ||||
B3LYP-D3/TZVP | 0.0 | 4.2 | 3.8 | 6.8 |
Enzyme, QM/MM Energy | ||||
OM2/CHARMM | 0.0 | 3.7 | –13.0 | –14.0 |
DFT(B3LYP-D3/SVP)/CHARMM | 0.0 | 10.3 | –10.2 | –10.4 |
DFT(B3LYP-D3/TZVP)/CHARMM | 0.0 | 11.8 | –8.4 | –8.2 |