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Figure 19:
Docking Results for the various ligands in the LBD centered at the ca27
binding pocket by 1-Click Docking. A is DHT. B is ca27. C is ca51. D is ca58. E is
ca27 without MA. F is ca27 with OH groups.
Figure 19 contains the various models run in 1-Click Docking centered at the new ca27 binding
pocket. The pocket is outlined by the labeled residues determined during the MolSoft trials. DHT
is seen binding as far away as the software will permit from this pocket whereas most of the ca27
analogs are binding directly into the middle of the pocket, in particular, ca58 is binding extremely
well in orientation to the ca27 binding pocket.
7.3
AutoLigand
AutoLigand was used to design and test a new ligand with minimal specifications to
the structure
besides approximate volume and surface area. The stepwise process for AutoLigand was to prep
the ligand
binding area for analysis, which needed to be done with DHT. DHT was manually
drawn as a 2-dimensional image and converted to a 3D .mol file then
converted to a PDBQT file
to upload to AutoDock by OpenBabel. Then the receptor needed to be configured. The receptor
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was uploaded to AutoDock and manually edited (adding hydrogens,
merging non-polar
hydrogens, etc.) to be outputted as a PDBQT file. This PDBQT file was then used to create grid
maps by first preparing gpf files and then outputting glg files to be used for AutoLigand.
Finally, AutoLigand is run using the functions previously discussed and
outputs a PDB file of the
best ligand given the minimal specifications.
Figure 20:
The outputted ligand from AutoLigand (left) and the binding of this new
ligand to the AR LBD in MolSoft
Figure 20 displays the new ligand outputted by AutoLigand. It is composed of 20
atoms
containing, 1 carbon, 11 oxygens, and 8 hydrogens. When bounded to the AR LBD in MolSoft, it
is apparent that this new ligand, which is more condensed than the previous ligands analyzed, does
not bind to either of the pockets previously discussed. This is further corroborated by 1-Click
Docking in figure 21 as this new ligand did not bind to either the DHT binding pocket nor the ca27
binding pocket when centered at each respectively. This is seen as the yellow highlighted residues