October 2011 - phenixbb - phenix-online.org

Simulated annealing composite omit map conversion
by Yuri 11 Oct '11

11 Oct '11

The figures are good illustration of what seems to be the consensus: Finely sampled maps can represent the best mathematical approximation of the continuous electron density function. The weirdness I referred to probably has more to do with what Nathaniel alluded to previously. The fact that our eyes get so used to staring at coarse pointy density - caused by the default grid of building programs (in the case of "on the fly" map generation from coefficients). That of course can be changed if one changes the sampling rate and get their eyes used to the new look. that I suppose would become your new norm. -- Yuri Pompeu

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MR_Rosetta and dimer of heterodimer
by Morten Grøftehauge 11 Oct '11

11 Oct '11

Hi everybody, I'm trying to phase a dimer of a heterodimer of a large, ~700aa, and small, ~150aa, component. The only good search model according to HHpred covers the first 500aa of the large component. So I am wondering whether I should add the 150aa to the end of the sequence file and add them to the fragment files in order for phenix.mr_rosetta to do density modification correctly? Or does this not matter at all? According to HHpred and others the last 200aa are beta sheets, probably a a beta sandwich or two, and the 150aa component consists of helical elements but that is as close as it really gets. Cheers, Morten

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Re: [phenixbb] Simulated annealing composite omit map conversion
by Yuri 11 Oct '11

11 Oct '11

hi Nathaniel, Thats simple enough... Do I have any control over grid ( make a tighter looking mesh for publication) -- Yuri Pompeu

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Phenix not reading my sca files
by Scott Classen 10 Oct '11

10 Oct '11

Why? Error is: Unknown file format for file /home/me/phenix/autosol/s4_peak.sca Unknown file format for file /home/me/phenix/autosol/s4_infl.sca Unknown file format for file /home/me/phenix/autosol/s4_rem.sca this also does not work: phenix.reflection_file_converter s4_peak.sca --mtz . error is: file_name: s4_peak.sca file_type: None No reflection data found in input file. Please advise. Thanks, Scott Classen

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Phenix file organization
by R.M. Garavito 10 Oct '11

10 Oct '11

To the Phenix gurus, I am in the midst of reorganizing our little Mac computer cluster, and will have a mixed collection of machines with OS 10.6.8 or 10.7.1. While the reorganization is going fine for the most part, I am having a little trouble getting Phenix to work on one machine. The problem is integrating a machine (a MacPro) into the cluster with users having different UIDs from their NIS accounts on the rest of the cluster. Thus, the NIS UID leads to not only a different UID for the user, but a different account (and therefore a different "home" directory) name. Simply changing ownership of the user's directories and files globally in OS 10.6.8 leads to Phenix choking at some stage when used under the NIS UID, but without an informative error message. Things go on fine when used under the old local UID and user name. So my question is does Phenix store the absolute paths in its various project indices? Any suggestions would be helpful. Thanks, Michael **************************************************************** R. Michael Garavito, Ph.D. Professor of Biochemistry & Molecular Biology 513 Biochemistry Bldg. Michigan State University East Lansing, MI 48824-1319 Office: (517) 355-9724 Lab: (517) 353-9125 FAX: (517) 353-9334 Email: garavito(a)msu.edu ****************************************************************

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Simulated annealing composite omit map conversion
by Yuri 10 Oct '11

10 Oct '11

"Fabricated" was probably a poorly chosen word. That implies made up data. I agree, I dont think cahnging the grid spacing would "introduce" unreal data to the maps... I just meant that it looks a little weird to have overly smooth mesh for a low res map... -- Yuri Pompeu

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Computing Robs vs Rcalc for twinned data with xtriage
by Pietro Roversi 10 Oct '11

10 Oct '11

Dear all, I am trying to run phenix.xtriage to compute Robs vs Rcalc for twinned data (from A. A. Lebedev, A. A. Vagin and G. N. Murshudov Intensity statistics in twinned crystals with examples from the PDB, Acta Crystallographica, D62, 83-95, (2006) My input: phenix.xtriage xray_data.file_name=$1.mtz xray_data.obs_labels="IMEAN, SIGIMEAN" xray_data.calc_labels="FCalc, PHICalc" xray_data.high_resolution=3.1 > phenix.xtriage.$$.log The FCalc, PHICalc columns (from CCP4-sfall) are in my mtzfile: 1 ASC -27 27 0 100.00 0.7 10.4 52.72 2.60 H H 2 NONE -90 90 0 100.00 0.7 34.2 52.72 2.60 H K 3 NONE 0 15 0 100.00 5.7 5.7 52.72 2.60 H L 4 NONE 0.0 19.0 0 100.00 9.50 9.50 52.72 2.60 I FreeR_flag 5 NONE -244.3 13664.9 0 100.00 467.59 469.74 52.72 2.60 J IMEAN 6 NONE 1.8 990.9 0 100.00 43.05 43.05 52.72 2.60 Q SIGIMEAN 7 NONE 16.2 1157.9 0 100.00 173.14 173.14 52.72 2.60 F F 8 NONE 1.7 51.3 0 100.00 12.91 12.91 52.72 2.60 Q SIGF 9 NONE 0.7 7827.1 0 100.00 257.63 257.63 52.72 2.60 F FCalc 10 NONE 0.0 360.0 0 100.00 180.24 180.24 52.72 2.60 P PHICalc and yet I get the error message: creamint:~/Projects/FactorI/Tetartohedral/P1/DataFiles> ~/Scripts/phenix_xtriage.csh AUTOMATIC_DEFAULT_free.klh_sfall1 Running phenix.xtriage No matching array: scaling.input.xray_data.calc_labels=FCalc, PHICalc Possible choices: AUTOMATIC_DEFAULT_free.klh_sfall1.mtz:IMEAN,SIGIMEAN AUTOMATIC_DEFAULT_free.klh_sfall1.mtz:F,SIGF Please use scaling.input.xray_data.calc_labels to specify an unambiguous substring of the target label. Sorry: No matching array: scaling.input.xray_data.calc_labels=FCalc, PHICalc

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Automated Mg & K ions picking
by Kristen Eisenberg 10 Oct '11

10 Oct '11

Hi Hasan, yes, we plan to extend water picking procedure so it can identify single-atom ions, but no specific tool is available to use right now. You need to inspect waters (for example, a water with "too small" refined B-factor is likely to be a metal), and density peaks (phenix.refine may not place a water into a density peak if it is too different from what is expected for water). Kristen Eisenberg Billige Flüge Marketing GmbH Emanuelstr. 3, 10317 Berlin Deutschland Telefon: +49 (33) 5310967 Email: utebachmeier at gmail.com Site: http://flug.airego.de - Billige Flüge vergleichen

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Re: [phenixbb] PHENIX atom selection language
by Kay Diederichs 09 Oct '11

09 Oct '11

Am 09.10.2011 04:20, schrieb phenixbb-request(a)phenix-online.org: > Date: Thu, 6 Oct 2011 18:19:34 -0400 > From: Jianghai Zhu<jzhu(a)idi.harvard.edu> > To: PHENIX user mailing list<phenixbb(a)phenix-online.org> > Subject: Re: [phenixbb] PHENIX atom selection language > Message-ID:<E21B0319-CC1D-47A6-9F23-4493700B319C(a)idi.harvard.edu> > Content-Type: text/plain; charset=us-ascii > > Cool. Thanks, Pavel. It would be nice to have a list of all selection keywords and corresponding definitions somewhere. > > -- Jianghai Hi Jianghai, anybody can contribute to the CCP4 wiki, where a Phenix article already exists - check out <http://strucbio.biologie.uni-konstanz.de/ccp4wiki/index.php/Phenix#Atom_sel…> Unfortunately the wiki is hit by spammers, and we regularly delete whole batches of these pseudo-"users" to keep the userlist clean. The spammers use @gmail.com and @hotmail.com email addresses which we now do not accept any more as new users' email - such addresses are just too easy to obtain. So if you would like to contribute make sure a) to use a email adress of your institution (e.g. university) b) and to contribute to an existing article or start a new one since we won't delete "real" users HTH, Kay

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Re: [phenixbb] Simulated annealing composite omit map conversion
by Yuri 09 Oct '11

09 Oct '11

I agree I like 0.25 (I believe thats what CNS spits out). Anything tighter looks fabricated -- Yuri Pompeu

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