Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 4 |
| Details | binding site for residue MG A 501 |
| Chain | Residue |
| A | CTP502 |
| A | HOH665 |
| A | HOH671 |
| A | HOH690 |
| site_id | AC2 |
| Number of Residues | 20 |
| Details | binding site for residue CTP A 502 |
| Chain | Residue |
| A | PHE330 |
| A | GLY347 |
| A | PHE348 |
| A | ARG349 |
| A | ARG350 |
| A | MG501 |
| A | HOH606 |
| A | HOH659 |
| A | HOH663 |
| A | HOH665 |
| A | HOH671 |
| A | HOH690 |
| B | GLU382 |
| B | ALA386 |
| B | THR387 |
| A | ARG311 |
| A | LEU319 |
| A | ASP322 |
| A | GLY327 |
| A | LEU329 |
| site_id | AC3 |
| Number of Residues | 4 |
| Details | binding site for residue MG B 501 |
| Chain | Residue |
| B | CTP502 |
| B | HOH608 |
| B | HOH609 |
| B | HOH680 |
| site_id | AC4 |
| Number of Residues | 20 |
| Details | binding site for residue CTP B 502 |
| Chain | Residue |
| A | GLU382 |
| A | ALA386 |
| A | THR387 |
| B | ARG311 |
| B | LEU319 |
| B | ASP322 |
| B | ILE323 |
| B | GLY327 |
| B | LEU329 |
| B | PHE330 |
| B | GLY347 |
| B | PHE348 |
| B | ARG349 |
| B | ARG350 |
| B | MG501 |
| B | HOH608 |
| B | HOH609 |
| B | HOH617 |
| B | HOH626 |
| B | HOH663 |
| site_id | AC5 |
| Number of Residues | 8 |
| Details | binding site for residue GOL B 503 |
| Chain | Residue |
| A | ARG350 |
| A | GLU382 |
| A | HOH631 |
| B | PRO331 |
| B | ARG350 |
| B | ARG365 |
| B | GLU382 |
| B | HOH637 |
