Hi Everybody,

if you run phenix.refine like:

% phenix.refine data.mtz model.pdb

and it stops with something like:

Sorry: Fatal problems interpreting PDB file: ...

this means there is unknown (to Monomer Library) molecule in you file. The standard way to fix it is to get a cif (parameters file) by running eLBOW (which is a part of PHENIX and CCI Apps):

% elbow.builder model.pdb --do-all

In this case eLBOW will go though your PDB file and generate a cif file for all unknown ligands. The output file will contain all in its name, like: elbow.XXX.all.cif.

So next time you run phenix.refine as:

% phenix.refine data.mtz model.pdb elbow.XXX.all.cif.

Also, in your case I'm really interested why water molecules in your file were causing the problem. I would really appreciate if you send me a couple of lines from your PDB file containing problematic waters, so I fix it and it will never happens again.

Yes, you can also remove all waters and ask phenix.refine to build them anew; it does a good job on doing so:

% phenix.refine data.mtz model.pdb ordered_solvent=true main.number_of_macro_cycles=5

Please let us know if you still have any questions / problems.

Pavel.

Matthew Bowler wrote:

Thanks for replies so far....

I removed all ligands and then waters - the waters seem to be the  
problem as the protein model is now refining, do they need to be  
treated/marked in a different way for phenix?

Thanks again, Matt.


On 15 Mar 2007, at 13:32, Nicholas Noinaj wrote:

matt,

can't offer much help, but have you tried to remove the ligand and  
try refinement?  it would let you know if the pdb file or the  
presence of the ligand is the problem.  at least let you would know  
where you should focus your attention.

if all else fails, have you tried getting parameters for your  
ligand from the PRODRG Server and using that for inputing the  
ligand parameters into phenix.refine directly when you setup the  
refinement job?  (I think i have done this before???)

here is the website in case you aren't familiar...
http://davapc1.bioch.dundee.ac.uk/programs/prodrg/

Again, Best of luck!



cheers,
nick


-----Original Message-----
From: Matthew Bowler <[email protected]>
To: [email protected]
Date: Thu, 15 Mar 2007 13:00:42 +0000
Subject: [phenixbb] phenix.refine problems with my pdb

Dear All,
	I am trying to run phenix.refine but I keep getting the message:


Sorry: Fatal problems interpreting PDB file:
   Number of atoms with unknown nonbonded energy type symbols: 308
   Please edit the PDB file to resolve the problems and/or supply a
   CIF file with matching restraint definitions. Note that
   elbow.builder is available to create restraint definitions.

I have run my ligands through elbow and used the output .cif but I
still get the same message.  I can find no info on this problem in
the manual or the BB, can anyone help?  Thanks in advance, yours,  
Matt.





Matthew Bowler
MRC Dunn Human Nutrition Unit
Wellcome Trust / MRC Building
Hills Road
Cambridge CB2 2XY
Tel: 0044 (0) 1223 252826
Fax: 0044 (0) 1223 252825

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_______________________________________________
phenixbb mailing list
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Matthew Bowler
MRC Dunn Human Nutrition Unit
Wellcome Trust / MRC Building
Hills Road
Cambridge CB2 2XY
Tel: 0044 (0) 1223 252826
Fax: 0044 (0) 1223 252825

_______________________________________________
phenixbb mailing list
[email protected]
http://www.phenix-online.org/mailman/listinfo/phenixbb