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Introduction

Case study

Tutorial: show the hydration free energy

1. Load the script from flare python gui: Flare | Python | Python Interpretor |Load .. (Figure 1. step 1, 2 and 3) gist_dG_at_picked_atom_flare_python_gui.py

2. select the protein intereted (Figure 1. step 4).

3. pick a atom, single click button Run (Figure 1. step 5 and 6).

Figure 1. Five steps to use the script

Tutorial: Calculate the ΔGwatdisp of the ligand

This section will introduce how to calculate the ΔGwatdisp for ligands 9s and 9z.

Enter the following command in the shell:

gist_dG_watdisp.py -g 5c29_apo_gist_dG.dx -i 9s-9z.sdf -o 9s-9z_out.sdf

You can find the GIST-dG-Watdisp tag in the output SDF file, which represents the calculated ΔGwatdisp. You can find the calculation results for 9s as follows:

>  <GIST-dG-Watdisp>  (1) 
-41.599

And ΔGwatdisp for 9z as follows:

>  <GIST-dG-Watdisp>  (2) 
-38.223

Thus, the ΔΔGwatdisp between 9s and 9z is 3.38 kcal/mol, which is very close to the difference in their binding free energies (ΔΔG = 3.44 kcal/mol).

Install requirement

rdkit, numpy and GridDataFormats are required.

Reference

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