Hi,

I just checked the apbs download page and I couldn't find apbs binaries
available for windows. The only way I've seen (through previous mailing
lists posts) is to compile it using cygwin, but the performance is less
than optimal.

So if you or someone else has compiled apbs for windows, the binary
location is the path to the apbs executable. For example "apbs" on your
windows system may be in c:\cygwin\usr\local\apbs\bin\i686\apbs .

Furthermore the psize.py should be located at:

c:\cygwin\usr\local\apbs\tools\manip\psize.py ..maybe something like that.

Yes the plugin is asking for the .dx electrostatic map. By default the
electrostatic map is placed into %TEMP% (maybe c:\documents and
settings\you\temp or c:\windows\temp). You can check what %TEMP% or
%TMP% is set to by going to control panels -> system -> "advanced" tab
-> environment variables.

Otherwise you can directly specify where the pymol-generated.dx file
should go by changing it in the "Temporary File Locations" tab of the
APBS tools (e.g. Temporary DX file: c:\mydir\pymol-generated.dx).

Also may I suggest that for a fast overall electrostatics calculation,
without having to compile anything, to look into GRASP2 for windows. It
is at http://trantor.bioc.columbia.edu/grasp2/ . You can import the .phi
maps from grasp into many applications including pymol and visualize
them also.

Hope that helps,
Sabuj Pattanayek

migalepa wrote:
> I've been trying to generate an electrostatic potential map of the surface of
> a protein using Pymol but haven't been successful. I'm working with the latest
> version of pymol (0.98, windows version), which brings the APBS plugin (I have
> as well installed the APBS plugin "apbs_tools.py") that is supposed to do the
> necessary calculation in a straightforward way, according to the guidelines
> provided in http://www-personal.umich.edu/~mlerner/Pymol/.  I've follewed them
> but the plugin asks for an "APBS binary location". I do not know what a
> "binary location" is or where to find it. I'm using PDB files converted to PQR
> files, as indicated in
> http://www.csb.yale.edu/userguides/graphics/pymol/electro.html.,  and run the
> APBS tool selecting a ramdonly chosen "APBS binary location".  The program
> seems to do calculations on the surface of the protein although does not
> generate any figure representing the results.  By clicking on visualization
> the plugin warms that at least a molecule and a map must be loaded.  Is the
> plugin asking for the calculated electrostatic surface map? Is so, how do I
> find it? Does it have to be with the "APBS binary location" issue? Well, lots
> of questions...
> 
> Thank you beforehand...
> 
> 
> 
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