mail[bug #23295] PDB secondary structure HELIX and SHEET records not updated when merging molecules.


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Posted by Edward d Auvergne on February 20, 2015 - 11:37:
URL:
  <http://gna.org/bugs/?23295>

                 Summary: PDB secondary structure HELIX and SHEET records not
updated when merging molecules.
                 Project: relax
            Submitted by: bugman
            Submitted on: Fri 20 Feb 2015 10:37:26 AM UTC
                Category: relax's source code
Specific analysis category: All analyses
                Priority: 3 - Low
                Severity: 2 - Minor
                  Status: None
             Assigned to: bugman
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 3.3.6
         Discussion Lock: Any
        Operating System: All systems

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Details:

The structure.read_pdb user function
<http://www.nmr-relax.com/manual/structure_read_pdb.html> fails to correctly
update HELIX and SHEET secondary structure metadata in a PDB file when
molecules are merged.  The attached '2BE6_secondary_structure.pdb' file which
contains the HELIX and SHEET records from the 2BE6 PDB file, as well as a few
atoms from each of the 6 molecules, together with the attached 'test.py' relax
script demonstrate the problem.  For example the input HELIX record:

HELIX    9   9 VAL D 1615  GLY D 1638  1                                  24

should be converted to:

HELIX    9   9 VAL A 1615  GLY A 1638  1                                  24

as the molecule with the 'D' chain ID is merged into the molecule with the 'A'
chain ID.  However the merger does not modify the HELIX record.



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File Attachments:


-------------------------------------------------------
Date: Fri 20 Feb 2015 10:37:26 AM UTC  Name: 2BE6_secondary_structure.pdb 
Size: 5kB   By: bugman

<http://gna.org/bugs/download.php?file_id=23876>
-------------------------------------------------------
Date: Fri 20 Feb 2015 10:37:26 AM UTC  Name: test.py  Size: 388B   By: bugman

<http://gna.org/bugs/download.php?file_id=23877>

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