[phenixbb] weird B factor refinement

Pavel Afonine pafonine at lbl.gov
Thu Mar 24 09:53:21 PDT 2011


  Hi,

- is there density for it?

- can it be partially occupied (alternative conformations) ?

- can it be Se?

- if so, try resetting B-factor back to similar values of surrounding 
atoms and refine occupancy just for that atom.

If nothing helps please send me the data and model files and I will have 
a look.

Pavel.

> Hi all,
> I am refining a structure and have turned on TLS refinement.
> Since I have done this, I see a weird behavior in some sulphur atom's 
> B factor, and their near atoms.
> I paste below an example.
> Has anybody else seen this? Looks like a bug...
> Thanks a lot in advance,
> ciao,
> s
>
> ATOM    655  N   PHE A  82      66.343 -40.145  -6.536  1.00 25.85     
>       N
> ANISOU  655  N   PHE A  82     3247   3386   3190    162    103    157 
>       N
> ATOM    656  CA  PHE A  82      65.631 -38.890  -6.206  1.00 23.86     
>       C
> ANISOU  656  CA  PHE A  82     2967   3126   2971    192    102    153 
>       C
> ATOM    657  C   PHE A  82      64.134 -39.032  -6.460  1.00 27.82     
>       C
> ANISOU  657  C   PHE A  82     3494   3640   3436    176    116    173 
>       C
> ATOM    658  O   PHE A  82      63.709 -39.388  -7.568  1.00 46.67     
>       O
> ANISOU  658  O   PHE A  82     5852   6065   5815    251    147    222 
>       O
> ATOM    659  CB  PHE A  82      66.174 -37.668  -6.970  1.00 14.67     
>       C
> ANISOU  659  CB  PHE A  82     1831   1971   1772    176    119    175 
>       C
> ATOM    660  CG  PHE A  82      65.501 -36.397  -6.574  1.00 25.83     
>       C
> ANISOU  660  CG  PHE A  82     3217   3375   3223    210    117    169 
>       C
> ATOM    661  CD1 PHE A  82      64.399 -35.932  -7.285  1.00 19.12     
>       C
> ANISOU  661  CD1 PHE A  82     2363   2528   2371    221    125    179 
>       C
> ATOM    662  CD2 PHE A  82      65.919 -35.707  -5.429  1.00 37.72     
>       C
> ANISOU  662  CD2 PHE A  82     4725   4876   4732    206    117    168 
>       C
> ATOM    663  CE1 PHE A  82      63.734 -34.784  -6.874  1.00 23.74     
>       C
> ANISOU  663  CE1 PHE A  82     2979   3122   2919    200    145    205 
>       C
> ATOM    664  CE2 PHE A  82      65.275 -34.544  -5.018  1.00 34.01     
>       C
> ANISOU  664  CE2 PHE A  82     4257   4438   4226    262    171    240 
>       C
> ATOM    665  CZ  PHE A  82      64.176 -34.080  -5.744  1.00 33.79     
>       C
> ANISOU  665  CZ  PHE A  82     4254   4389   4196    197    145    203 
>       C
> ATOM    666  N   CYS A  83      63.337 -38.791  -5.425  1.00* 35.53*   
>         N
> ANISOU  666  N   CYS A  83     4471   4615   4413    176    117    175 
>       N
> ATOM    667  CA  CYS A  83      61.879 -38.960  -5.524  1.00* 55.90*   
>         C
> ANISOU  667  CA  CYS A  83     7050   7200   6991    181    121    181 
>       C
> ATOM    668  C   CYS A  83      61.332 -37.537  -5.259  1.00* 48.88*   
>         C
> ANISOU  668  C   CYS A  83     6132   6340   6100    265    163    240 
>       C
> ATOM    669  O   CYS A  83      61.949 -36.777  -4.512  1.00* 50.54*   
>         O
> ANISOU  669  O   CYS A  83     6344   6544   6313    262    165    239 
>       O
> ATOM    670  CB  CYS A  83      61.343 -40.122  -4.596  1.00*  2.87*   
>         C
> ANISOU  670  CB  CYS A  83      332    481    275    174    114    172 
>       C
> ATOM    671  SG  CYS A  83      61.739 -41.776  -5.153  1.00*212.79*   
>         S
> ANISOU  671  SG  CYS A  83    26919  27069  26861    166    105    162 
>       S
> ATOM    672  N   ASP A  84      60.251 -37.131  -5.925  1.00 46.73     
>       N
> ANISOU  672  N   ASP A  84     5887   6042   5827    199    138    202 
>       N
> ATOM    673  CA  ASP A  84      59.894 -35.684  -6.003  1.00 53.97     
>       C
> ANISOU  673  CA  ASP A  84     6774   6990   6743    291    187    268 
>       C
> ATOM    674  C   ASP A  84      59.468 -34.966  -4.713  1.00 54.16     
>       C
> ANISOU  674  C   ASP A  84     6797   6968   6812    239    140    198 
>       C
> ATOM    675  O   ASP A  84      59.898 -33.835  -4.448  1.00 54.40     
>       O
> ANISOU  675  O   ASP A  84     6861   7005   6804    211    158    221 
>       O
> ATOM    676  CB  ASP A  84      58.829 -35.479  -7.062  1.00 52.17     
>       C
> ANISOU  676  CB  ASP A  84     6574   6736   6511    218    157    225 
>       C
> ATOM    677  CG  ASP A  84      59.320 -35.845  -8.416  1.00 59.41     
>       C
> ANISOU  677  CG  ASP A  84     7456   7647   7469    252    143    207 
>       C
> ATOM    678  OD1 ASP A  84      60.375 -35.284  -8.783  1.00 61.87     
>       O
> ANISOU  678  OD1 ASP A  84     7770   7956   7782    252    144    207 
>       O
> ATOM    679  OD2 ASP A  84      58.683 -36.697  -9.087  1.00 57.64     
>       O
> ANISOU  679  OD2 ASP A  84     7230   7428   7243    253    141    207 
>       O
>
>
> -- 
> Sebastiano Pasqualato, PhD
> Crystallography Unit
> IFOM-IEO Campus
> Cogentech - Consortium for Genomic Technologies
> via Adamello, 16
> 20139 - Milano
> Italy
>
> tel +39 02 9437 5172
> fax +39 02 9437 5990
>
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