Hi Michael,

where did you look for creatine?  My first stop would be the pdb, and 
when I type the word creatine in the ligand search window, I get three hits:

3A6J  3B6R  1V7Z

Identification of ligand binding sites and computational docking of 
ligands is a bit more involved than opening both components in PyMOL. 
RosettaDock does a good job but has a steep learning curve.  You can 
also do molecular dynamics (ditto).  Either process will work much 
better if you have a rough idea where the binding site is. 
Identification of surface features shared between your structure and the 
binding sites in the three structures in the pdb could be a first step, 
also sequence alignment and identification of conserved residues, 
especially those involved in creatine binding above.  Or you identify 
residues that when mutated abolish creatine binding in your protein.

You don't say that you know the structure of your protein.  If you don't 
have that, Phyre can quickly show if (and how much) your protein is 
similar to known creatine binding proteins.

Best.


Andreas



On 14/11/2013 10:40, Michel Bielecki wrote:
> Hey guys,
>
> I was wondering if someone could give me some information, I tried
> finding it out myself but failed. I just recently started using pymol.
> What I am trying to achieve: I have a protein (Sequence known), based on
> experiments I know that it is a creatine transporter. My first problem
> is that I can´t find a creatine.pdb anywhere. Now suppose I find it -
>   is it somehow possible to open  both files in pymol and tell it to
> find possible binding sites for my creatine molecule?
> Or do I need additional plugins for that? If so - which ones?
> I would be grateful for any help.
>
> Thanks in advance!
>
> Michael
>
>
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-- 
                   Andreas Förster
      Crystallization and Xray Facility Manager
            Centre for Structural Biology
               Imperial College London

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