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Jerry Karle
by Robert Sweet 19 Jun '13

19 Jun '13

Jerry Karle died a couple of weeks ago, and one of us here learned about it by noticing his obituary in the NY Times: http://www.nytimes.com/2013/06/15/health/jerome-karle-94-dies-nobelist-for-… He's well known to those of us who started in this field when the solving of a Patterson function for a heavy atom in a structure was the only way we knew to get the structure. With Herb Hauptman, and in close teamwork with his wife Isabella who actually >did< crystallography, he played a major role in working out the sort of Direct Methods that allowed one to solve ordinary small-molecule structures before the days of high-speed computing. As the obituary points out, Jerry and Herb shared the 1985 Nobel Prize in Chemistry for this work. The obit. is worth reading. I suspect you'll see an even better one in Nature soon. My own tiny personal memory of Jerry Karle: When I was a grad student at the Univ. of Wisc. with Larry Dahl I made a pilgrimage to the NRL to visit Jerry and Isabella. I was trying to use direct methods to solve at least one cephalosporin structure, which eventually appeared in my thesis, and there was a feature of DM that I failed to understand. They were very patient with me, but couldn't understand what it was I didn't get. It turns out to have been essentially trivial, but that's the way it goes sometimes. Anyway he always recognized me afterwards, or pretended to. I was delighted on arriving at BNL to discover that his daughter Louise was here. Bob ========================================================================= Robert M. Sweet E-Dress: sweet(a)bnl.gov Group Leader, PXRR: Macromolecular ^ (that's L Crystallography Research Resource at NSLS not 1) http://px.nsls.bnl.gov/ Photon Sciences and Biosciences Dept Office and mail, Bldg 745, a.k.a. LOB-5 Brookhaven Nat'l Lab. Phones: Upton, NY 11973 631 344 3401 (Office) U.S.A. 631 344 2741 (Facsimile) =========================================================================

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Re: [phenixbb] cv convert to mtz file
by Pavel Afonine 17 Jun '13

17 Jun '13

Hi Majid, I had no problems converting cbh1_c10a.cv into MTZ using Phenix "Reflection file editor". To convert he other one (cbh1_fg34.cv) you need to add CRYST1 record similarly to cbh1_c10a.cv. Make sure you use recent version of Phenix.. Pavel On 6/17/13 5:48 AM, Majid Haddad Momeni wrote: > Dear Sir/Madam, > > I need help to be able to convert my .cv file to mtz, I have already tried both ccp4 package and Phenix through "Convert to/modify/extend MTZ" and "Reflection file editor" > However they didn't work! > I do highly appreciated of your assistance, > > Best Regards > Majid Haddad Momeni > PhD Student > Swedish University of Agricultural Sciences, > Uppsala-Sweden

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Beamtime available at NE-CAT (APS)
by Cyndi Salbego 14 Jun '13

14 Jun '13

Synchrotron beam time available to general users at NE-CAT (Sector 24 of APS) during the month of July 24ID-C beamline features: - Undulator beamline fully tunable from 6 to 21 keV (2.1 to 0.6 Angstroms) - PILATUS 6M pixel array detector, allowing continuous fine phi-sliced data acquisition at up to 25 frames per second - MD2 microdiffractometer with triple aperture (70, 30, or 10 micron apertures) - MK3 mini-kappa available on the microdiffractometer allowing reorientation of crystals for better diffraction geometry. - ALS style sample mounting robot compatible with ALS pucks or Unipucks 24ID-E beamline features: - Fixed energy undulator beamline (12662 eV) optimized for Se-SAD data collection - Beam stability optimized for smaller beams (down to 5 micron) - ADSC Q315 CCD detector - MD2 microdiffractometer with triple aperture (50, 20, or 5 micron apertures) - ALS style sample mounting robot compatible with ALS pucks or Unipucks - Remote data collection available For more info on our beamlines and updated schedule availability please see necat.chem.cornell.edu or contact Cyndi Salbego (csalbego(a)anl.gov). To apply for General User Time (Rapid Access for 2013-2 run) please go to: https://beam.aps.anl.gov/pls/apsweb/gup0005.start_page Cyndi Salbego Administrator, NE-CAT 630.252.0689

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Re: [phenixbb] elbow
by Mengbin Chen 13 Jun '13

13 Jun '13

Dear Dr. Dias, I tried the command line in Terminal, but Elbow still regularized the conformation and bonds of the ligand and the result turned out to be the same with that I ran thorough GUI. The thing is that the input pdb file has a conformation the ligand should adopt so that I do not really want energy minimization or geometry optimization to be done on it. Although I set "none" for "geometry optimization" in GUI, it unfortunately changed the ligand conformation. Thank you, Mengbin On Thu, Jun 13, 2013 at 2:52 PM, Mengbin Chen <mengbinc(a)sas.upenn.edu>wrote: > Dear Dr. Dias, > > I tried the command line in Terminal, but Elbow still regularized the > conformation and bonds of the ligand and the result turned out to be the > same with that I ran thorough GUI. The thing is that the input pdb file has > a conformation the ligand should adopt so that I do not really want energy > minimization or geometry optimization to be done on it. Although I set > "none" for "geometry optimization" in GUI, it unfortunately changed the > ligand conformation. > > Thank you, > Mengbin > > > On Thu, Jun 13, 2013 at 2:42 PM, Joao Dias <joao.dias(a)heptares.com> wrote: > >> Dear Mengbin, >> You can open a terminal window and run elbow as a command line. >> >> phenix.elbow --final_geometry input_file.pdb**** >> >> >> Do not forget to initialize the phenix environment, depending on your >> terminal shell, one example is: >> source >> /Applications/PHENIX-dev-1320/Contents/phenix-dev-1320/phenix_env.sh >> >> All the best, >> Joao >> >> Dr Joao Dias**** >> >> Principal Scientist**** >> >> ** ** >> >> Heptares Therapeutics Ltd**** >> >> BioPark, Broadwater Road,**** >> >> Welwyn Garden City,**** >> >> Herts, AL7 3AX**** >> >> UK >> >> From: Mengbin Chen <mengbinc(a)sas.upenn.edu> >> Reply-To: PHENIX user mailing list <phenixbb(a)phenix-online.org> >> Date: Thursday, 13 June 2013 19:32 >> To: PHENIX user mailing list <phenixbb(a)phenix-online.org> >> Subject: [phenixbb] elbow >> >> Dear PHENIX Users, >> >> I have been playing around with Elbow for a while, but I kept having >> problems generating .cif file. For "Chemical file type" and "Template PDB >> file", I used the pdb file of the ligand. Since the coordinates in the pdb >> file corresponds to a conformation desired, I chose "None" for "geometry >> optimization". After running Elbow, the output pdb file was completely >> different than the input one -- even double bonds became single bonds and >> 10-membered ring conformation changed. I have tried Sketcher in CCP4 >> package, but no good results either. Could anyone tell me how to do this >> correctly? Any help is appreciated! >> >> Thank you in advance, >> Mengbin >> >> -- >> Mengbin Chen >> Department of Chemistry >> University of Pennsylvania >> >> [image: www.heptares.com] <http://www.heptares.com><http://www.heptares.com> >> >> >> The information in this e-mail is confidential and may be legally >> privileged. It is intended for the exclusive attention of the addressee >> stated above and should not be copied or disclosed to any other. If you >> have received this transmission in error, please make no use of its >> contents and contact the sender. Contact and registered office address: >> Heptares Therapeutics Limited, BioPark, Broadwater Road, Welwyn Garden >> City, Hertfordshire, AL7 3AX. Company No: 06267989 >> >> > > > -- > Mengbin Chen > Department of Chemistry > University of Pennsylvania > -- Mengbin Chen Department of Chemistry University of Pennsylvania

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elbow
by Mengbin Chen 13 Jun '13

13 Jun '13

Dear PHENIX Users, I have been playing around with Elbow for a while, but I kept having problems generating .cif file. For "Chemical file type" and "Template PDB file", I used the pdb file of the ligand. Since the coordinates in the pdb file corresponds to a conformation desired, I chose "None" for "geometry optimization". After running Elbow, the output pdb file was completely different than the input one -- even double bonds became single bonds and 10-membered ring conformation changed. I have tried Sketcher in CCP4 package, but no good results either. Could anyone tell me how to do this correctly? Any help is appreciated! Thank you in advance, Mengbin -- Mengbin Chen Department of Chemistry University of Pennsylvania

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Discrepancy between R-factors from phenix.refine vs phenix Generate "Table 1"
by Sam Stampfer 12 Jun '13

12 Jun '13

Dear Phenix Community, I am preparing my structure for deposition and ran it through the Generate "Table 1" function in phenix. The inputs I gave it were my .mtz structure factors file, the final pdb coordinate file, and the log file from hkl2000. I did not provide unmerged data. My pdb file (which had been refined using phenix.refine) had values of r_work=0.2342 r_free=0.2603 However, phenix.model_vs_data (from Generate "Table 1") gave me r_work=0.2940 r_free=0.3150 I also got this warning about resolution limits, but I think it should not have affected the R-free calculation to this extent: WARNING: Resolution limits in scaling log for structure A549T are inconsistent with resolution limits in the MTZ file: 50.00 - 3.02 (in logfile) 48.47 - 3.03 (in MTZ file) When I refined my model in phenix, I used the twin law h,-h-k,-l. I read in the documentation that twinning can account for some of this discrepancy, but that the program is supposed to take twinning into account if it will lower the calculated R-work by more than 2%, which it doesn't seem to have done (or there is some other problem with my data). Thanks for your help! -Sam

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den refinement
by Andreas Förster 12 Jun '13

12 Jun '13

Dear all, I'm trying to get DEN refinement going from the command line. The run aborts quickly with the following error in the log file: Sorry: Cartesian simulated annealing should not be turned on for DEN refinement. Annealing settings are controlled in the den parameter scope. The DEN scope in input.def looks like this: den { reference_file = den_ref_Jun.pdb gamma = 0.5 kappa = 0.1 weight = 30 sigma = 0.44 optimize = True opt_gamma_values = 0 0.2 0.4 0.6 0.8 1 opt_weight_values = 3 10 30 100 300 num_cycles = 12 kappa_burn_in_cycles = 2 bulk_solvent_and_scale = True refine_adp = True final_refinement_cycle = False verbose = False annealing_type = *torsion cartesian output_kinemage = False restraint_network { lower_distance_cutoff = 3 upper_distance_cutoff = 15 sequence_separation_low = 0 sequence_separation_limit = 10 exclude_hydrogens = True ndistance_ratio = 1 export_den_pairs = False den_network_file = None } Annealing type is torsion from what I can tell. What am I doing wrong? (Release tag: 1394, Platform: intel-linux-2.6-x86_64 redhat-e6.2) Thanks. Andreas -- Andreas Förster, Research Associate Paul Freemont & Xiaodong Zhang Labs Department of Biochemistry, Imperial College London http://www.msf.bio.ic.ac.uk

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Discrepancy between phenix.refine and phenix.model_vs_data R-factors
by Abhinav Kumar 11 Jun '13

11 Jun '13

I am getting a significant difference between the R-factors written by phenix.refine and phenix.model_vs_data. 1. Phenix.refine phenix.refine "in.pdb" "Fobs.mtz" "refinement.input.xray_data.labels=FP SIGFP" "refinement.input.xray_data.high_resolution=2.50" "fix_rotamers=True" "ordered_solvent=True" "strategy=tls+individual_sites+individual_adp" Final R-work = 0.1829, R-free = 0.2141 2. Phenix.model_vs_data phenix.model_vs_data out.pdb Fobs.mtz f_obs_label="FP" r_free_flags_label="FreeR_flag" high_resolution=2.50 comprehensive=true r_work(re-computed) : 0.1808 r_free(re-computed) : 0.2099 How can I reproduce the phenix.refine R-factors in phenix.model_vs_data? -- Thanks, Abhinav JCSG@SSRL, SLAC (650) 926-2992

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phenix elbow: is similar compound helpful to create restraint for new ligand?
by Rongjin 11 Jun '13

11 Jun '13

Hello Phenix users, I have tetrabutylphosphonium in my crystal. I found a similar compound tetrabutylammonium (PDB residue name TBA) which are found in several PDB entries. Usually I draw the new compound in 2-D format and convert to 3D and then create restrain files. In this case, considering N and P are very similar, will the TBS be helpful for elbow to generate restrains for tetrabutylphosphonium? Thanks Rongjin Guan

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Hi
by Wei Shi 10 Jun '13

10 Jun '13

Hi all, I was trying to solve the structure of a protein in several different datasets using xds and phenix. I could solve the structure from one dataset in space group P4. For another dataset, I could solve the structure using the monomer of the structure I got from the first dataset as search model and solve the structure in space group mC. For the third dataset, in IDXREF.LP, the space group of the highest symmetry is hp: 101.2, 101.3, 58.8, 90, 90, 120. According to Mathiews coefficient, 1 monomer is expected in the asymmetric unit. But I couldn't get the molecular replacement solution using the same method as for the second dataset. I also tried several other search models (eg. deletion of the potential flexible region in the search model) and tried to find the solution in all possible pointgroup. I also tried to process the data in oC (C222), the space group of the second highest symmetry in IDXREF.LP, but, still I could not get right molecular replacement solution. I don't whether this means that there is a big conformational change for the structure in the third dataset or the space group I use is not right. Let me know if any of you would have any comments or suggestions for me. Thank you so much! Best, Wei

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