[phenixbb] Fw: on phenix.real_space_refine

Smith Lee smith_lee123 at yahoo.com
Sun Oct 18 08:55:39 PDT 2015

Dear Pavel,
On Oct 9, 2015 I have e-mailed to you my experience with 1.9-1692 and version 1.10 (and 1.10.1) on phenix.real_space_refine.
Today I just completed another protein phenix.real_space_refine. For the following comparison runs, the initial model same, the map same, all 5 macro_cycles default  run.
For version 1.10.1, the results were as following,
Map CC (whole unit cell): 0.672Map CC (around atoms): 0.761rmsd (bonds):  0.01rmsd (angles): 1.55All-atom clahscore: 39.27Ramachandran outlier: 0.98%Ramachandran allowed: 12.71%Ramachandran favoured: 86.31%Rotamer outliers: 0.91%C-beta deviations: 0
For version 1.9-1692, the results were as following,
Map CC (whole unit cell): 0.645Map CC (around atoms): 0.687rmsd (bonds):  0.0071rmsd (angles): 1.15All-atom clahscore:16.88Ramachandran outlier: 2.00%Ramachandran allowed: 6.23%Ramachandran favoured: 91.77%Rotamer outliers: 0.05%C-beta deviations: 0
For the  version 1.10.1 phenix.real_space_refine, the most unacceptable was on the clashscore, the whole refine process seems did not care on the clashcore refine at all.
I am looking forward to getting an explanation from you on the causes of the difference for phenix.real_space_refine for the 2 versions, and the possible strategy we can take to eliminate the difference to get the acceptable results.
Best regards.

       On Friday, October 9, 2015 12:52 AM, Smith Lee <smith_lee123 at yahoo.com> wrote:

  Dear Pavel,
As I have told you, I have tried phenix.real_space_refine for 2 protein with version 1.9-1692 and version 1.10 (and 1.10.1) for many times, with cif or without cif, with or without annealing. The general feedback was that the version 1.9-1692 was much much better for the final analysis of the PDB given at the end of the run of the phenix.real_space_refine. Especially for clashing score, version 1.9-1692 can gave acceptable results (below 20 or around 20), but the clashing score given by the above 2 new versions of phenix.real_space_refine was very high (around 50 or 100). For C-beta deviations,  the output by 1.9-1692 was also much better
Before I have tried the other nightly built versions of phenix.real_space_ refine between version 1.9-1692 and version 1.10 (and 1.10.1) , all I gave acceptable output analysis (something like the Molprobity analysis at the end of the run).
Thus may I ask the reason you have version 1.10 (and 1.10.1) phenix.real_space_refine was because you have realized that the result given by version 1.9-1692 was too satisfactory?
One direct concern of me was that you have recommended not to use the old version phenix. But I cannot get the satisfactory result with the new version phenix.real_space_refine.
The other concern of me was that, I have noticed there were publications In Nature and Science which wrote they use phenix.real_space_refine to got the results in Nature and Science. The Phenix they used should be the versions earlier than version 1.10. Considering what I mentioned above, the Nature and Science results may be not so correct, if new version of phenix was considered as much better than the old version.
Thus am I the only user who communicated with you on the high clashing score given by the new version of phenix?Can you give some comments on what I mentioned above on the high clashing score given by the new version phenix.real_spac_refine?

Best regards.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://phenix-online.org/pipermail/phenixbb/attachments/20151018/1310795b/attachment.htm>

More information about the phenixbb mailing list