TABLE 2.
Hydrogen bonds between bound rUMP, the Mg2+ ion, and PAN atoms and residues
| rUMP atom | Hydrogen bond(s) between rUMP atoms anda: |
Distance (Å)b | |
|---|---|---|---|
| PAN residue | PAN atom | ||
| O4 | Leu16 (wat) | O | 2.4 (2.6) |
| Glu80 | Oε1 | 2.6 | |
| O2 | Leu42 | N | 2.9 |
| O4′ | His41 | Nδ | 2.9 |
| O1P | R137 (wat) | Nζ | 2.7 (2.4) |
| O2P | Ile120 | O | 3.3 |
| Tyr130 (wat) | OH (wat) | 2.8 (3.3) | |
| O3P | Mg2+ | 2.1 | |
a
wat, water-mediated hydrogen bond.
b
The value outside parentheses is the distance from rUMP atoms to water, while the value inside parentheses is the distance from water to PAN atoms.