2.000 Å
X-ray
2007-03-26
| Name: | Lactose operon repressor |
|---|---|
| ID: | LACI_ECOLI |
| AC: | P03023 |
| Organism: | Escherichia coli |
| Reign: | Bacteria |
| TaxID: | 83333 |
| EC Number: | / |
| Chain Name: | Percentage of Residues within binding site |
|---|---|
| A | 100 % |
| B-Factor: | 23.333 |
|---|---|
| Number of residues: | 31 |
| Including | |
| Standard Amino Acids: | 29 |
| Non Standard Amino Acids: | 0 |
| Water Molecules: | 2 |
| Cofactors: | |
| Metals: | |
| Ligandability | Volume (Å3) |
|---|---|
| 0.904 | 526.500 |
| % Hydrophobic | % Polar |
|---|---|
| 47.44 | 52.56 |
| According to VolSite | |

| HET Code: | IPT |
|---|---|
| Formula: | C9H18O5S |
| Molecular weight: | 238.301 g/mol |
| DrugBank ID: | DB01862 |
| Buried Surface Area: | 69.37 % |
| Polar Surface area: | 115.45 Å2 |
| Number of | |
|---|---|
| H-Bond Acceptors: | 6 |
| H-Bond Donors: | 4 |
| Rings: | 1 |
| Aromatic rings: | 0 |
| Anionic atoms: | 0 |
| Cationic atoms: | 0 |
| Rule of Five Violation: | 0 |
| Rotatable Bonds: | 3 |
| X | Y | Z |
|---|---|---|
| 18.5678 | -11.6506 | 1.1174 |
Image generated by PoseView
Represent the protein/ligand binding mode, centered on the ligand
Dashed lines represents hydrogen bonds and metal interactions
Green residue labels for amino acids with hydrophobic contacts (green lines) to the ligand
| Ligand | Protein | Interaction | |||
|---|---|---|---|---|---|
| Atom | Atom | Residue | Distance (Å) | Angle (°) | Type |
| C6 | CB | SER- 69 | 4.43 | 0 | Hydrophobic |
| C4 | CD1 | LEU- 73 | 4.22 | 0 | Hydrophobic |
| C6 | CD1 | LEU- 73 | 3.9 | 0 | Hydrophobic |
| S1 | CB | ALA- 75 | 4.27 | 0 | Hydrophobic |
| C2 | CB | ALA- 75 | 3.62 | 0 | Hydrophobic |
| C6 | CG | PRO- 76 | 3.95 | 0 | Hydrophobic |
| S1 | CD1 | ILE- 79 | 4.48 | 0 | Hydrophobic |
| C2' | CD1 | ILE- 79 | 3.74 | 0 | Hydrophobic |
| C3' | CB | ASP- 149 | 4.02 | 0 | Hydrophobic |
| C3' | CB | SER- 193 | 3.62 | 0 | Hydrophobic |
| O2 | NH2 | ARG- 197 | 2.84 | 143.83 | H-Bond (Protein Donor) |
| O2 | NH1 | ARG- 197 | 2.9 | 140.32 | H-Bond (Protein Donor) |
| C3 | CE3 | TRP- 220 | 3.55 | 0 | Hydrophobic |
| C4 | CD2 | TRP- 220 | 3.56 | 0 | Hydrophobic |
| C5 | CE2 | TRP- 220 | 3.81 | 0 | Hydrophobic |
| C3 | CB | ASN- 246 | 3.94 | 0 | Hydrophobic |
| O3 | ND2 | ASN- 246 | 2.79 | 143.29 | H-Bond (Protein Donor) |
| O2 | OD1 | ASP- 274 | 2.66 | 150.99 | H-Bond (Ligand Donor) |
| O2 | OD2 | ASP- 274 | 3.22 | 142.94 | H-Bond (Ligand Donor) |
| O3 | OD2 | ASP- 274 | 2.81 | 146.73 | H-Bond (Ligand Donor) |