- phenixbb - phenix-online.org

positive density around heavy metals
by Subhani Bandara 28 Mar '12

28 Mar '12

Hi everyone, I have refined a protein with a metal-chelate complex at 1.4 resolution and saw positive density around some metals that are on a two fold. I refined those chelator complexes with fixed occupancy to avoid the negative density seen around it as they are partially occupied. Also I had to avoid xyz refinement after fixing them on special position, to avoid moving away from two fold. I have attached a figure of one of those complexes. If I increase occupancy then it shows negative density. How can I get rid of this positive density. Thanks in advance for the help Subhani

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Re: [phenixbb] merging in hires data in AutoBuild
by Desiree Ho-Chi Fong, Ms 27 Mar '12

27 Mar '12

It works! Thank you. Desiree

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Generating a list of peak heights in a Bijvoet difference Fourier
by John Rose 27 Mar '12

27 Mar '12

Hi, Is there a way to get a print out of the peak positions and their heights from a Bijvoet difference Fourier map? I can generate the map and see the peals but I would like a listing also. Thanks, John Rose John Rose Ph.D. Associate Professor B204B, The Fred C. Davison Life Sciences Complex 120 Green Street Department of Biochemistry and Molecular Biology University of Georgia Athens, GA 30602-7229 ========================================= Phone: 706-542-1750 Fax: 706-542-3077

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merging in hires data in AutoBuild
by Desiree Ho-Chi Fong, Ms 27 Mar '12

27 Mar '12

Hello all, I am using PHENIX 1.7.3-928 and I am trying to merge a high resolution native data set with a MAD data set in AutoBuild. I have run AutoBuild through the GUI as well as on the command line. Here is the command I used: phenix.autobuild data=AutoSol_run_1_/exptl_fobs_phases_freeR_flags_1.mtz hires_file=hires.mtz model=AutoSol_run_1_/overall_best.pdb rebuld_in_place=True The data file, exptl_fobs_phases_freeR_flags.mtz from AutoBuild only includes data to the resolution of the MAD data set. The higher resolution native data was not incorporated into this mtz file. Looking at the log file, the hires data was merged with expel_fobs_phases_freeR_flags_1.mtz from AutoSol (with AutoBuild after) and followed by anisotropy correction. This was then used for density modification. However, the high resolution data was never included in the mtz file for refinement in AutoBuild. My understanding is that if hires data is specified in AutoBuild, the phases would be extended and included in map calculation as well as subsequent refinement. The output exptl_fobs_phases_freeR_flags.mtz from AutoBuild would also include the hires data for subsequent refinement. Is this correct? Thank you for your help. Desiree

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R value difference in model vs data vs refinement
by Christian Roth 24 Mar '12

24 Mar '12

Dear all, I refined a structure in phenix quite good resolution (1.4 Ang.) After the last refinement I created the "table 1" to extract all data. Interestingly I got a warning due to small changes in the R values R/Rfree after Refinement. 15,46/18,16 Phenix modelvs.data gives me R/Rfree 15,34/18,07 Interestingly this is nearly exactly the value which I got after the first OHS scattering optimization from phenix R/Rfree 15,43/18,03 The differences are of course very small and negeligible, but I wonder why it happens. Esspecially taking into account that it was refined with phenix and in this case I would expect that both values match exactly. Thank you very much in advance Best Regards Christian

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sequence file for DNA-Protein complex
by Sita Ram Meena 24 Mar '12

24 Mar '12

Hello Everyone. As per my knowledge we gives the Protein sequence .SEQ OR .DAT file format having only protein sequence in Caps and no gaps now, Please suggest me how we can give a sequence file for double stranded DNA-Protein Complex for the use in Phenix autobuild. Thank you. Best Regards Sita Ram

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error generating output file overal_best pdb
by Andres PALENCIA 23 Mar '12

23 Mar '12

Dear Phenix users, I have been running Phenix_Autobuild successfully for the last houra. The program generates the corresponding Autobuild_run_** folders as usually, however I got an error message when the program was trying to generate the overal_best.pdb file after the Autobuild cycle 3. I copy below the error message that I got, thank you in advance for any help: OSError : [Errno 2] No such file or directory: '/user/palencia' Traceback (most recent call last): File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/phenix/wxGUI2/Home/Jobs.py", line 170, in OnTimer self.project.refresh_detached_jobs() File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/phenix/wxGUI2/Tracking.py", line 72, in refresh_detached_jobs tmp_dir = self.get_tmp_dir() File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/phenix/phenix/tracking/project.py", line 97, in get_tmp_dir os.makedirs(tmp_dir) File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/build/intel-linux-2.6-x86_64/base/lib/python2.7/os.py", line 150, in makedirs makedirs(head, mode) File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/build/intel-linux-2.6-x86_64/base/lib/python2.7/os.py", line 150, in makedirs makedirs(head, mode) File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/build/intel-linux-2.6-x86_64/base/lib/python2.7/os.py", line 150, in makedirs makedirs(head, mode) File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/build/intel-linux-2.6-x86_64/base/lib/python2.7/os.py", line 150, in makedirs makedirs(head, mode) File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/build/intel-linux-2.6-x86_64/base/lib/python2.7/os.py", line 150, in makedirs makedirs(head, mode) File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/build/intel-linux-2.6-x86_64/base/lib/python2.7/os.py", line 150, in makedirs makedirs(head, mode) File "/softdist/exp/pxsoft/phenix/v1.7.3-928/redhate4-x86_64/phenix-1.7.3-928/build/intel-linux-2.6-x86_64/base/lib/python2.7/os.py", line 157, in makedirs mkdir(name, mode) OSError: [Errno 2] No such file or directory: '/user/palencia' Platform info: __FILE__ = /net/anaconda/scratch1/phenix/phenix-1.7.3-928/cctbx_project/boost_adaptbx/meta_ext.cpp __DATE__ = Dec 6 2011 __TIME__ = 04:18:10 __x86_64__ __linux __GNUC__ = 3 __GNUC_MINOR__ = 4 __GNUC_PATCHLEVEL__ = 2 boost::python::cxxabi_cxa_demangle_is_broken(): false __GXX_WEAK__ = 1 __LP64__ = 1 __VERSION__ = 3.4.2 20041017 (Red Hat 3.4.2-6.fc3) FE_INEXACT = 32 FE_DIVBYZERO = 4 FE_UNDERFLOW = 16 FE_OVERFLOW = 8 FE_INVALID = 1 FE_ALL_EXCEPT = 61 __SSE2__ = 1 BOOST_LIB_VERSION = 1_48 PY_VERSION = 2.7.2 PYTHON_API_VERSION = 1013 sizeof(bool) = 1 sizeof(short) = 2 sizeof(int) = 4 sizeof(long) = 8 sizeof(std::size_t) = 8 sizeof(void*) = 8 sizeof(long long) = 8 sizeof(float) = 4 sizeof(double) = 8 sizeof(long double) = 16 sizeof(boost::int32_t) = 4 sizeof(boost::uint32_t) = 4 sizeof(wchar_t) = 4 __PTRDIFF_TYPE__ Py_USING_UNICODE sizeof(PY_UNICODE_TYPE) = 2 gnu libc version: 2.5 BOOST_ADAPTBX_TYPE_ID_SIZE_T_EQ_UNSIGNED_LONG os.name: posix sys.platform: linux2 sys.byteorder: little platform.platform(): Linux-2.6.18-238.9.1.el5-x86_64-with-redhat-5.7-Final platform.architecture(): ('64bit', 'ELF') floating_point_exceptions.division_by_zero_trapped: False floating_point_exceptions.invalid_trapped: False floating_point_exceptions.overflow_trapped: False number of processors: 24 Memory total: 25,263,722,496 Memory free: 20,157,317,120 import thread: OK "hello" = ['h', 'e', 'l', 'l', 'o'] u"hello" = ['h', '\x00', 'e', '\x00', 'l', '\x00', 'l', '\x00', 'o', '\x00'] u"\u00C5" = ['\xc5', '\x00'] as utf-8 = ['\xc3', '\x85'] LATIN CAPITAL LETTER A WITH RING ABOVE = Ã

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Rosetta and disulphides
by Morten Groftehauge 23 Mar '12

23 Mar '12

Hi phenix-bb'ers, Is there anyway to make phenix.mr_rosetta take disulphide bridges into account? It's a rather enormous restraint on conformational space after all (wait is that a constraint or restraint? I get confused). Cheers, Morten -- Morten K Grøftehauge, PhD Pohl Group Durham University

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about readyset
by Ming 23 Mar '12

23 Mar '12

Dear all, I was using ready set to get my pdb ready. It automatically built the ligand cif file from scratch too. And the phenix.refine was fine with the files from ready set. Then I tried another method in which I threw everything that phenix.refine needs, including pdb file, ligand cif file, ligand pdb file, mtz. And phenix.refine ran smoothly again. But the refinement results were different between these two ways. The R fac is 1% different. I think ready set is only making the phenix.refine easier by generating ligand and building H, but if I do all the work of ready set and prepare the files for phenix.refine. Aren't they supposed to give the same results back? Can anyone help me here? Thanks a lot. -- Ming

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Partially reduced disulfides
by Christopher Wanty 23 Mar '12

23 Mar '12

Hi, I have a structure that appears to have a combination of reduced and oxidised disulfides. >From previous reading on the board I've taken the strategy of dropping the disulfide detection cutoff to 0.1 then added back the disulfides as appropriate using restraints. The problem I now have is that for some of these cysteine pairs there are clearly oxidised and reduced positions in the density. Modelling altloc's for each of these works, but the occupancies do not refine as I expected; the altloc's involved in the disulfide I expected to have the same occupancy as their counterpart in the disulfide. To try to get these to match, I introduced occupancy constraint that look like: constrained_group { selection = (chain A and resseq 276 and altloc B) or (chain A and resseq 286 and altloc B) } But with that the sum of occupancies for altloc 276 (for example) is not adding to 1.00. My thought is that I need to change the occupancy constraints but I'm not sure how to make them do what I want. Any help/advice is appreciated. Regards, Chris ------------------------------------------------------- Dr. Christopher Wanty christopher.wanty(a)uwa.edu.au Research Associate Biomolecular, Biomedical and Chemical Sciences, Building M310 University of Western Australia 35 Stirling Highway Crawley 6009 Western Australia Australia

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