- phenixbb - phenix-online.org

unit cell dimesions
by Thomas, Leonard M. 13 May '20

13 May '20

Hello All, I have run into something that has me a bit puzzled. When finishing up a structure we ended reprocessing the data to get nice statistics for deposition, I don’t want to get into that discussion. Upon reprocessing the unit cell dimensions shifted slightly, 0.05 A or so. The PDB file used had the unit cell from the original solution/refinement while the data set cell dimensions were different. I ran the newly processed reflection data set through the reflection editor in order to transfer the Rfree set. Now the really odd thing is that I ended up reprocessing a couple times and transferring over the Rfree set once more. The cell dimensions on the final reflection file is from not the original reflection file/PDB but one that was used with an intermediate cutoff between the two, it is not the cell dimensions in the input reflection either. Just for completeness the data were processed using XDS at SSRL. My question is where does phenix.refine pick up the unit cell dimensions and were does the reflection file editor pick them up? Best Regards Len Leonard Thomas, Ph.D. Macromolecular Crystallography Laboratory Oklahoma COBRE in Structural Biology Price Family Foundation Institute of Structural Biology University of Oklahoma Department of Chemistry and Biochemistry Stephenson Life Sciences Research Center 101 Stephenson Parkway Norman, OK 73019-5251 Office: (405)325-1126 lmthomas(a)ou.edu<mailto:[email protected]> http://www.ou.edu/structuralbiology/cobre-core-facilities/mcl

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install fail in linux
by 안우찬 12 May '20

12 May '20

Hi, I have a problem with install phenix-1.18.1-3865 in linux. My linux version is NAME="Red Hat Enterprise Linux Atomic Host" VERSION="7.4.0.4". The error massage is ============================================================================= Traceback (most recent call last): File "./bin/install.py", line 244, in <module> installer(sys.argv[1:]).install() File "/home01/x1959a02/phenix/phenix-installer-1.18.1-3865-intel-linux-2.6-x86_64-centos6/li b/libtbx/auto_build/install_distribution.py", line 190, in install self.check_directories() File "/home01/x1959a02/phenix/phenix-installer-1.18.1-3865-intel-linux-2.6-x86_64-centos6/li b/libtbx/auto_build/install_distribution.py", line 268, in check_directories os.makedirs(i) File "/usr/lib64/python2.7/os.py", line 157, in makedirs mkdir(name, mode) ============================================================================= Thanks in advance, Teddy Ahn

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How to compare between electron density maps?
by Murpholino Peligro 12 May '20

12 May '20

I want to compare electron density features of map A from protein A and map B from protein B... Because each map has a different rmsd level... ...what is the best way to compare electron density between maps? Is there a way to normalize maps or something like that? Thanks

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Is there a way to search the phenixbb mailing list archive?
by Murpholino Peligro 11 May '20

11 May '20

With the ccp4bb at https://www.jiscmail.ac.uk/cgi-bin/webadmin I can search for a term in the archive. Is there something similar in the phenixbb? Thanks Or... is there a way to wget all the gz files?

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Online Course on Neutron Scattering Applications in Structural Biology
by Meilleur, Flora 11 May '20

11 May '20

ORNL Online Course on Neutron Scattering Applications in Structural Biology (https://conference.sns.gov/event/217/) June 1 - June 5, 2020 2:00 pm - 5:30 pm EST Registration (free) is now open and will close May 17, 2020. This online course is designed for graduate students, post-doctoral researchers and faculty with knowledge of structure and function of biological macromolecules but with limited to no experience with neutron sciences. The course will cover the basics of deuterium labeling, small angle neutron scattering, neutron reflectometry, neutron spectroscopy, neutron imaging and neutron crystallography. Instrumentation, sample preparation, data collection and processing will be introduced for each neutron technique.

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Boost 1.70 update for cctbx
by Billy Poon 09 May '20

09 May '20

Hi everyone, There is currently a pull request for cctbx that will update Boost to 1.70 ( https://github.com/cctbx/cctbx_project/pull/409). The update enables support for Python 3.7 and 3.8. The plan is to merge this next Friday, May 8, at 3 pm Pacific. After merging, developers should delete the build/lib/*boost* files and build/boost directory so that any remnants of the old Boost are removed and then rebuild. Let me know if you have any questions. Thanks! -- Billy K. Poon Research Scientist, Molecular Biophysics and Integrated Bioimaging Lawrence Berkeley National Laboratory 1 Cyclotron Road, M/S 33R0345 Berkeley, CA 94720 Tel: (510) 486-5709 Fax: (510) 486-5909 Web: https://phenix-online.org

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Phenix installation
by Sam Tang 06 May '20

06 May '20

Hi I am installing Phenix on a Fedora 30 station. It complains line 15: /usr/bin/python: No such file or directory. I have checked that there is python3.7.3 pre-loaded. So did I miss anything obvious...? Brs Sam

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Ligand refinement - geometry does not fit density
by Schulz, Eike-Christian 04 May '20

04 May '20

Dear all, I am refining a structure with a simple ligand in phenix 1.14. The ligand is present in 2 conformations at approx. equal occupancy. Refinement of the 2 conformations runs smoothly, but 2 problems occur 1. One of the ligand atoms is placed out of the electron density after refinement. The geometry file (via elbow) is present during refinement. The atom is not in an extreme position or clashes with anything else. 2. After refinement the ligand conformation cannot be changed in coot, although I import the cif dictionary. Any advise ? Best, Eike

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Phenix 1.18 RSR runtime
by Hannah Bridges 02 May '20

02 May '20

Dear Phenix developers, We have updated to phenix version 1.18-3845-000 and found that realspace refinement (5 cycles) with minimization global, local grid search and ADP is taking about 36 hours, compared to ~ 1hr in versions 1.17 and 1.16. The slow step is the local grid search which is taking >6 hours each cycle. We are very glad for the option to run the job detached, but I wondered if this sort of timing was expected for this version? Best wishes Hannah -- Dr Hannah Bridges Investigator Scientist MRC Mitochondrial Biology Unit The Keith Peters Building University of Cambridge Cambridge Biomedical Campus Hills Road Cambridge CB2 0XY United Kingdom Telephone : 01223 252812

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off-topic; suggestions for 96head liquid handler
by Georg Mlynek 30 Apr '20

30 Apr '20

Dear Scientific community, we have lend over Viaflow96 liquid handler (used for pipetting 35-50 uL in 96 well crystallization plates) to our Covid -19 Diagnostics Initiative. As we believe that this story will be ongoing for some longer time I am looking for a new 96 head liquid handler. We are happy with the Viaflow and have two heads 10-300 uL; 0.5-12.5 uL. However one tip box (96 tips for the 10-300 uL) is about 4 €. This compares to ~1 € for the refilling racks we use for our single channel pipettes (It is said that boxes have to be more rigid, because of pressure during tip loading). Therefore if you have a 96 head liquid handler for volumes of 20-60 uL where cheap tips can be used (automation not necessary) please write me. Many thanks in advance, best regards, Georg.

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