Dear PyMOL users,

I would like to generate a figure of my protein where the surface electrostatic 
potential is displayed. PyMOL now comes with a demo function for display of 
such a surface. However, when I apply the commands used in this demo, i.e.

cmd.set("coulomb_dielectric",80.0)
         cmd.map_new("e_pot","coulomb",1.0,"pept",5)
         cmd.ramp_new("e_lvl","e_pot",[-3.6,-1.6,0.4])
         cmd.set("surface_color","e_lvl","pept")
         cmd.refresh()

to the model from my pdb file, I get a uniformly blue surface. I believe this 
must be due to the lack of assignment of partial/formal charges to the atoms in 
the pdb file. So, my questions are:

1. Is it possible to automatically assign the correct charges to atoms within 
PyMOL
2. If not, is there a program that will do this and if so can the output from 
this program be understood by PyMOL in some way.

Thanks for your help

Roger

--
Roger Dodd
CIMR
Addenbrooke's Hospital
Cambridge

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