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zn anomalous
by Pengfei Fang 10 Jan '12

10 Jan '12

Dear All, I collected a dataset at 0.9774 angstrom. the structure is already by MR. Can you please teach me how to tell a specific site has Zn-atom anomalous signal or not using phenix? thank you! Pengfei

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phenix.refine request: output den restraints to a file...
by Francis E Reyes 10 Jan '12

10 Jan '12

Hi phenixbb (Jeff probably), I wanted to try a few different protocols with the den refinement. It occurred to me that phenix.refine won't take den restraints as an external file, instead it seems to be generating them on the fly. Can I have an option to output (and also read in) den restraints? I'd like to generate them once and use the same restraints to test a different refinement params. F --------------------------------------------- Francis E. Reyes M.Sc. 215 UCB University of Colorado at Boulder

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Output for den optimization runs
by Francis E Reyes 09 Jan '12

09 Jan '12

Is there a refine.log for each den (gamma, weight) optimization? I can't seem to find one anywhere and I'm curious to see how it's doing. Thanks! F --------------------------------------------- Francis E. Reyes M.Sc. 215 UCB University of Colorado at Boulder

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Chirality of Ribityl chain of FMN inverted
by Yuri 09 Jan '12

09 Jan '12

Hello Developers, When I built Ligand restraints using eLBOW, my resulting .pdb had an inverted chiral center in the ribityl chain of the flavin mononucleotide particularly C4'. In the database the ligand had an S configuration (correct), but after minimization and restraint generation the output had R configuration at that particular center. I wonder if there is a way to enforce the configuration for each center, although I suspect it could be a little bug, because I noticed my restraints have that center annotated as S eventhough it is R in the actual .pdb Cheers, -- Yuri Pompeu

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molecular replacement of protein/DNA complex
by Wei Shi 07 Jan '12

07 Jan '12

Hi all, I have been trying to solve a protein-DNA complex structure using molecular replacement. I suspect two copies of protein bind one piece of the DNA, and the angle between the two copies of protein is somewhere between 130 to 180 degrees. I could get molecular replacement solution using a search model of protein/DNA complex I made with deletion in part of the protein and with the angle between the two proteins about 145 degrees. Only 1 copy of this two-protein/one-DNA complex is expected in the ASU. Below is the statistics for the solution. RFZ=2.9 TFZ=6.9 PAK=0 LLG=111 TFZ==14.6 LLG=111 And when I open the pdb file and generate symmetry mates, no clashes and I could see contacts between the end of DNA, but space instead of contacts between layers of the protein/DNA complex. I suspect that the angle between the two proteins I use in the search model is not quite right. No solution if I search with DNA and protein separately. I am trying to find a way to move the protein a little bit around the original solution and see whether that can help me make the solution better. I just read that “ROTate AROUnd option of the brute rotation serch” and “NMAPdb” might do this? Does anyone have any suggestions about what I could try? Thank you so much! Best, Wei

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Only three weeks left to apply for RapiData 2012, a course on Data Collection and Structure Solving at the NSLS.
by Robert Sweet 06 Jan '12

06 Jan '12

We are offering RapiData 2012, the fourteenth offering of our popular course: Rapid Data Collection and Structure Solving at the NSLS: A Practical Course in Macromolecular X-Ray Diffraction Measurement The course will be held 22-27 April 2012: http://www.bnl.gov/rapidata/. Students could be at any level from advanced undergraduate to full professor. The course should accommodate 48 students total. We encourage all students to bring their own specimens for data collection, and to bring old data for the data-reduction and structure-solving tutorials. Please read the Course Announcement at http://www.bnl.gov/RapiData/. You'll see that many experts in the field will be available for lectures and tutorials. You'll find the application materials on the Course Application tab at this site. For the tenth time we will hold a short lecture course on the fundamentals of crystallography for roughly five hours on Sunday 22 April. The body of the RapiData course really requires that students have a healthy knowledge of crystallography. For potential students who have some experience but are shaky about fundamentals, this course will help. There will be a small additional fee for the fundamentals course, to pay for Saturday night accomodations and food on Sunday morning and noon. Latin American Scientists: Several scholarships are available, from the International Union of Crystallography, to pay partial travel and subsistence costs for Latin-American students and junior faculty (under 40 yrs). Please apply for the course, and then contact R. Sweet (sweet(a)bnl.gov) if you are interested in applying for a scholarship. In accordance with the standards of the International Union of Crystallography, we observe the basic policy of non-discrimination, affirming the right and freedom of scientists to associate in international scientific activity without regard to such factors as citizenship, religion, creed, political stance, ethnic origin, race, colour, language, age, or gender, in accordance with the Statutes of the International Council for Science. At this course no barriers will exist beyond the application procedure that would prevent the participation of bona fide scientists. Please apply or send your students to our course, Bob Sweet, Sonya Kiss, and Alex Soares Course Announcement at http://www.bnl.gov/RapiData/ ========================================================================= 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/ Biology Dept Brookhaven Nat'l Lab. Phones: Upton, NY 11973 631 344 3401 (Office) U.S.A. 631 344 2741 (Facsimile) =========================================================================

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CCI-Apps - Cygwin incompatibility after upgrade
by Schubert, Carsten [JRDUS] 05 Jan '12

05 Jan '12

Hi, After upgrading my cci_apps install on Windows from 1.7-718 to 1.7.3-928 the interoperability with cygwin is gone. Calling phenix.refine just gives a 'Command not found' error. Turns out that the little .exe files for each subprogram were replaced by .bat files. That is fine if one just wants to use the DOS CLI, but cygwin is not able to call programs via .bat files as far as I know. Is there a workaround for this problem besides working in the DOS CLI (yuk)? Thanks Carsten

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phenix.metal_coordination
by Young-Jin Cho 03 Jan '12

03 Jan '12

Hi everyone and wish your happy new year. I have a question regarding phenix.metal_coordination. when I typed my pdb file that has two alternative conformations of different species including metal such as a metal(B) and a water(A). It seems like, in this case, phenix.metal_coordination doesn't read the metal. Otherwise, is there other way I can let make .edits file for this pdb file? Thanks always in advance, Young-Jin

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whether my following data are acceptable
by Dialing Pretty 02 Jan '12

02 Jan '12

Dear All, Following is the data range of my x-ray statistics by resolution bin: FOM between 0.84 to 0.86 Phase error between 17.90 to 24.14 scale factor from 0.88 to 1.07 SigmaA from 0.85 to 0.95 #work from 2688 to 2922 #test from 133 to 157 Do these data are within the acceptable range? Cheers, Dialing

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reference model restraints
by Ursula Schulze-Gahmen 24 Dec '11

24 Dec '11

I am refining a 3.1 A structure and are trying to use model restraints for this. There are 3 molecules in the asymmetric unit of my structure. I input the high resolution structure of one molecule of the reference structure to create restraints during the refinement. From looking at the log file, it seems to me that the reference structure is aligned to only one of my molecules, but not the other 2. How can I make sure the restraints are valid for all 3 molecules. Ursula -- Ursula Schulze-Gahmen, Ph.D. Assistant Researcher UC Berkeley, QB3 356 Stanley Hall #3220 Berkeley, CA 94720-3220

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