July 2009 - phenixbb - phenix-online.org

Re: [phenixbb] source of fobs for refinement after AutoSol
by Tom Terwilliger 09 Jul '09

09 Jul '09

Hi James, Yes, that is correct. However if you want...you can just go on to AutoBuild and build a new model from scratch and generate a set of free R flags there, supplying your data as data=mydata.sca. I would recommend this anyway because AutoBuild makes a much better model than AutoSol, and including the model from AutoSol doesn't necessarily help (and can make it worse if the AutoSol model is really incomplete, such as from secondary- structure-only model-building). I use the AutoSol model-building just to see if things are going well and then I throw that model away. This is also the default when you use "after_autosol=True" in AutoBuild and when you run the AutoBuild GUI after running AutoSol. It is convenient to use the data and freeR in in exptl_fobs_phases_freeR_flags_*.mtz from AutoSol but you don't have to. The key of course is: once you refine a model and want to use that model further...you must use the set of free R flags used in that original refinement from then on. If you throw away that model and start from scratch you can also make a new set of free R flags. The hexdigest REMARK in your PDB file from phenix.refine helps you make sure that this is done correctly. All the best, Tom T On Jul 9, 2009, at 8:35 AM, James Whittle wrote: > Dear Tom: > > Ok. Thanks for the quick response! > > I should run then run AutoSol again to get this file, and it will > have the HL coefficients in it? > > --James > > > On Jul 9, 2009, at 10:13 AM, Tom Terwilliger wrote: > >> Hi James, >> >> As you are expecting, in AutoSol the file >> exptl_fobs_phases_freeR_flags_*.mtz normally contains the >> experimental Fobs and free R flags for refinement, along with >> phases and HL coefficients from the experimental phasing. >> >> However if an anisotropy correction is applied to the data, then by >> default no refinement is done in AutoSol and no >> exptl_fobs_phases_freeR_flags_*.mtz file is created. This is to >> ensure that refinement is not carried out against anisotropy- >> corrected data (you want to refine against the original data, and >> have phenix.refine apply an anisotropy correction as part of >> refinement). >> >> If you supply >> >> input_refinement_file=my_data.sca >> >> then my_data.sca will be used for refinement and an >> exptl_fobs_phases_freeR_flags_*.mtz will be created. Note that >> my_data.sca can be identical to your input data file if you want. >> I am guessing that in your case an anisotropy correction was >> applied to the data in this way. >> >> I hope that helps! >> -Tom T >> ps. I am thinking of changing the default to make >> input_refinement_file automatically defined if an anisotropy >> correction is applied so that you don't have to do this... >> >> On Jul 9, 2009, at 7:55 AM, whittle wrote: >> >>> Dear all, >>> >>> I have a question regarding the output of AutoSol. >>> >>> I've run AutoSol, using the data directly from scalepack as a .sca >>> file, >>> and would like to now begin refining the structure I've built. >>> >>> There seems to be no exptl_fobs_phases_freeR_flags_*.mtz file in the >>> AutoSol directory. Isn't this the right file to use? Since it's not >>> there, is it proper to use the phaser_2.mtz file for phenix.refine? >>> >>> --James >>> >>> _______________________________________________ >>> phenixbb mailing list >>> phenixbb(a)phenix-online.org >>> http://www.phenix-online.org/mailman/listinfo/phenixbb >> >> >> Thomas C. Terwilliger >> Mail Stop M888 >> Los Alamos National Laboratory >> Los Alamos, NM 87545 >> >> Tel: 505-667-0072 email: terwilliger(a)LANL.gov >> Fax: 505-665-3024 SOLVE web site: http://solve.lanl.gov >> PHENIX web site: http:www.phenix-online.org >> ISFI Integrated Center for Structure and Function Innovation web >> site: http://techcenter.mbi.ucla.edu >> TB Structural Genomics Consortium web site: http://www.doe-mbi.ucla.edu/TB >> CBSS Center for Bio-Security Science web site: http://www.lanl.gov/cbss >> >> >> >> >> _______________________________________________ >> phenixbb mailing list >> phenixbb(a)phenix-online.org >> http://www.phenix-online.org/mailman/listinfo/phenixbb > Thomas C. Terwilliger Mail Stop M888 Los Alamos National Laboratory Los Alamos, NM 87545 Tel: 505-667-0072 email: terwilliger(a)LANL.gov Fax: 505-665-3024 SOLVE web site: http://solve.lanl.gov PHENIX web site: http:www.phenix-online.org ISFI Integrated Center for Structure and Function Innovation web site: http://techcenter.mbi.ucla.edu TB Structural Genomics Consortium web site: http://www.doe-mbi.ucla.edu/TB CBSS Center for Bio-Security Science web site: http://www.lanl.gov/cbss

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source of fobs for refinement after AutoSol
by whittle 09 Jul '09

09 Jul '09

Dear all, I have a question regarding the output of AutoSol. I've run AutoSol, using the data directly from scalepack as a .sca file, and would like to now begin refining the structure I've built. There seems to be no exptl_fobs_phases_freeR_flags_*.mtz file in the AutoSol directory. Isn't this the right file to use? Since it's not there, is it proper to use the phaser_2.mtz file for phenix.refine? --James

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2010 Gordon Conference on Diffraction Methods
by Andrew Leslie 02 Jul '09

02 Jul '09

The Gordon Research Conference on Diffraction Methods in Structural Biology will be held at Bates College in Lewiston, Maine, from July 18-23, 2010. As in the past, the program will include the latest developments in methodology covering all aspects of macromolecular crystallography, from crystallisation to model refinement and validation. We are currently preparing a preliminary program for the meeting, and would welcome suggestions for particular topics (with or without speakers). Please Email your suggestions to Andrew Leslie (andrew(a)mrc-lmb.cam.ac.uk) or Ana Gonzalez (ana(a)slac.stanford.edu). Andrew and Ana

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map output by phenix.refine
by 丁玮 01 Jul '09

01 Jul '09

Hi Pavel, Thank you for responding to my question so eloquently. But there are still something confusing me. First of all, when I used coot to open the "_map_coeffs.mtz", only two maps were displayed in the window,not four? Second, how to choose the maps coefficients? In phenix documentation, we konw that any specified coefficients can be set, for example: 2mFo-DFc, 2.7mFo-1.3DFc, Fo-Fc, 3Fo-2Fc. but it do not tell us why we should choose different coefficients. Thanks a lot. dream830106

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GUI problems
by Phil Evans 01 Jul '09

01 Jul '09

Hi I've just installed the Linux 64-bit version 1.4-105 on a CentOS5 machine, and I get a lot of errors in starting up the GUI. What am I missing? Also is it possible to install both the 32-bit & 64-bit versions together: I know it works for the executables in build/intel- linux-2.6 build/intel-linux-2.6-x86_64, but does that mess up the gui? It's OK on the command line Phil

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