Hi Martin,

As you've found, the mutagenesis wizard destroys the ordering in some
cases.  I'll look into it.

Cheers,

-- Jason

On Tue, Dec 7, 2010 at 11:34 AM, Martin Hediger <ma....@bluewin.ch> wrote:
> Good day
> I use PyMOL to introduce mutations into a structure. It occured to me that
> when saving the modified structure, atom sequence was not preserved. Using
>
> set retain_order
> set pdb_retain_ids
>
> is supposed to control this. It seems now, as if mutating a structure does a
> really weired thing:
> Once the mutation is introduced, the sequence becomes completely disordered
> in a sense that the atoms of the "new" residue are placed in between the
> atoms of the very first residue, in terms of sequence (not geometry).
> This results in a PDB file like this (PRO is the first residue, PHE is the
> residue to which the mutation is being carried out):
>
> ATOM      1  N   PRO A   1      53.611  -4.470  40.679  1.00  0.00      PROT
> N
> TER       2      PRO A   1
> ATOM      0  N   PHE D  14      55.428  -5.717  38.365  1.00  0.00      PROT
> N
> TER       1      PHE D  14
> ATOM      2  CA  PRO A   1      52.399  -3.722  40.197  1.00  0.00      PROT
> C
> TER       3      PRO A   1
> ATOM      1  CA  PHE D  14      55.821  -4.897  37.223  1.00  0.00      PROT
> C
> TER       2      PHE D  14
> ATOM      3  C   PRO A   1      52.805  -2.296  39.783  1.00  0.00      PROT
> C
> TER       4      PRO A   1
> ATOM      2  CB  PHE D  14      54.681  -4.879  36.160  1.00  0.00      PROT
> C
> TER       3      PHE D  14
> ATOM      4  O   PRO A   1      53.381  -1.530  40.550  1.00  0.00      PROT
> O
> TER       5      PRO A   1
> ATOM      3  CG  PHE D  14      54.928  -4.027  34.905  1.00  0.00      PROT
> C
> TER       4      PHE D  14
> ATOM      5  CB  PRO A   1      51.360  -3.675  41.342  1.00  0.00      PROT
> C
> TER       6      PRO A   1
> ATOM      4  CD1 PHE D  14      56.116  -4.189  34.183  1.00  0.00      PROT
> C
> TER       5      PHE D  14
> ATOM      6  CG  PRO A   1      52.019  -4.362  42.549  1.00  0.00      PROT
> C
> TER       7      PRO A   1
> ATOM      5  CD2 PHE D  14      54.011  -3.049  34.512  1.00  0.00      PROT
> C
> TER       6      PHE D  14
> ATOM      7  CD  PRO A   1      53.253  -5.096  41.996  1.00  0.00      PROT
> C
> TER       8      PRO A   1
> ATOM      6  CE1 PHE D  14      56.391  -3.370  33.093  1.00  0.00      PROT
> C
> TER       7      PHE D  14
> ATOM      8  HA  PRO A   1      51.990  -4.297  39.323  1.00  0.00      PROT
> H
> TER       9      PRO A   1
> ATOM      7  CE2 PHE D  14      54.282  -2.238  33.413  1.00  0.00      PROT
> C
> TER       8      PHE D  14
> ATOM      9 1HB  PRO A   1      50.434  -4.192  41.043  1.00  0.00      PROT
> H
> TER      10      PRO A   1
> ATOM      8  CZ  PHE D  14      55.473  -2.397  32.707  1.00  0.00      PROT
> C
> TER       9      PHE D  14
> ATOM     10 2HB  PRO A   1      51.070  -2.637  41.594  1.00  0.00      PROT
> H
> TER      11      PRO A   1
> ATOM      9  C   PHE D  14      56.113  -3.478  37.649  1.00  0.00      PROT
> C
> TER      10      PHE D  14
> ATOM     11 1HG  PRO A   1      51.327  -5.056  43.052  1.00  0.00      PROT
> H
> TER      12      PRO A   1
> ATOM     10  O   PHE D  14      55.357  -2.867  38.421  1.00  0.00      PROT
> O
> TER      11      PHE D  14
> ATOM     12 2HG  PRO A   1      52.313  -3.615  43.311  1.00  0.00      PROT
> H
> TER      13      PRO A   1
> ATOM     11 1HD  PHE D  14      56.847  -4.922  34.497  1.00  0.00      PROT
> H
> TER      12      PHE D  14
> ATOM     13 1HD  PRO A   1      54.110  -5.062  42.704  1.00  0.00      PROT
> H
>
>
> Can this be explained somehow?
>
> Thanks for your answers.
> Martin
>
>
>
>
>
>
>
>
> On 09.11.10 13:26, Jason Vertrees wrote:
>>
>> Hi Martin,
>>
>> set retain_order
>> set pdb_retain_ids
>>
>> Cheers,
>>
>> -- Jason
>>
>> On Tue, Nov 9, 2010 at 4:30 AM, Martin Hediger<ma....@bluewin.ch>  wrote:
>>>
>>> Dear all
>>> It occured to me that PyMOL is resequencing a structure when saving. I
>>> am trying to interpolate between two structures where it is critical to
>>> have identical sequence in both structures. Is it possible submit a
>>> <DO_NOT_RESEQUENCE>-option to the save command?
>>>
>>> Thanks for your help
>>> Martin
>>>
>>>
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>>
>>
>



-- 
Jason Vertrees, PhD
PyMOL Product Manager
Schrodinger, LLC

(e) jason.vertr...@schrodinger.com
(o) +1 (603) 374-7120

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