If your PDB file conforms to standard

  http://www.wwpdb.org/documentation/format23/sect9.html#ATOM

you could do

  % egrep "^CRYST|^SCALE|^ATOM" your.pdb > standard_residues_only.pdb

You'll miss the 'non-standard' Se-MET residue 'MSE' ;-)

Clemens

On Thu, Aug 30, 2007 at 11:22:29PM +0900, Hyunchul Kim wrote:
> I need to do this for many many pdb files so, is there any methods to
> get protein chain only automatically?
> 
> Best,
> 
> Hyunchul
> 
> 2007-08-30 (???) ??? 15:16 +0100 ??? Antony Oliver ????????????????????????:
> > You could simply hand-edit the PDB file to remove the offending ligand.
> > 
> > Regards,
> > 
> > Tony.
> > 
> > 
> > 
> >     Hi, all
> > 
> >     I want to write a specific chain structures(protein). I tried PDBSET and
> >     biopython but they couldn't deal with some exceptional case.
> >     For example, some pdb files contain both protein structure and ligand
> >     structure in a given chain ID(e.g. 'A' or ' ')
> > 
> >     How can I obtain full chain structures without ligand structure by other
> >     methods than clicking one by one at any website.
> > 
> >     Thanks in advance.
> > 
> >     Best,
> >     Hyunchul Kim
> > 
> > -- 
> > Dr Antony W Oliver
> > CR-UK DNA Repair Enzymes Group
> > Section of Structural Biology
> > The Institute of Cancer Research
> > 237 Fulham Road
> > Chelsea
> > London SW3 6JB
> > Phone: 020 7153 5451 / 5571
> > Fax:   020 7153 5457 
> > E-mail: [EMAIL PROTECTED]
> > --
> > 
> > 
> > 
> > The Institute of Cancer Research: Royal Cancer Hospital, a charitable 
> > Company Limited by Guarantee, Registered in England under Company No. 
> > 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.
> > 
> > This e-mail message is confidential and for use by the addressee only.  If 
> > the message is received by anyone other than the addressee, please return 
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-- 

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