[ccp4bb] Phenix refine has a problem with the added H, plz help

2011-04-26 Thread Salameh, Mohd A., Ph.D.
Dear All, I normally refine my structure without the hydrogens until the final stages. But today I'm facing a real trouble with phenix.refine!! It seems phenix.refine does not recognize the hydrogen atoms and writes out this message: "Fatal problems interpreting PDB file: number of atoms with unkno

[ccp4bb] measuring shape complementarity

2010-12-06 Thread Salameh, Mohd A., Ph.D.
Dear All, I'm looking for a free program that I can use to measure the geometric surface complementarity of protein-protein interfaces. I have created inhibitor mutants that possess different binding affinities to their cognate enzyme and it would be very helpful if I can quantify the shape complem

Re: [ccp4bb] Alignment software

2010-05-25 Thread Salameh, Mohd A., Ph.D.
Thank you all for very helpful suggestions, I used the software STRAP, Espript is also user friendly and effective. Many recommended ALINE, but unfortunately I had troubles with the download. Thanks again, Mohd

[ccp4bb] Alignment software

2010-05-21 Thread Salameh, Mohd A., Ph.D.
Dear All, I'm trying to prepare an alignment figure of 2 proteins that highlight conserved and similar residues and probably secondary structures; I will greatly appreciate it if anybody can recommend a software that I can use. Thanks, Mohd

Re: [ccp4bb] phenix target weight refinement

2010-03-12 Thread Salameh, Mohd A., Ph.D.
Pablo Rd Jacksonville, FL 32224 Tel: (904) 953-0046 Fax: (904) 953-0277 salameh.m...@mayo.edu ** -Original Message- From: Phil Jeffrey [mailto:pjeff...@princeton.edu] Sent: Friday, March 12, 2010 12:37 PM To: Salameh, Mohd A., Ph.D. Subject: Re: [ccp4bb

[ccp4bb] phenix target weight refinement

2010-03-12 Thread Salameh, Mohd A., Ph.D.
Dear All, In every refinement round the wxc and wcu are out of control, although I modify the def file and change the values of wxc=1 and wxu=1 so they are tightly restrained, but it failed to fix the problem, wxc and wxu values keep fluctuating, in my latest refinement round wxc=256!! wxu=3. T

Re: [ccp4bb] phenix refinement peptide bond poor geometry

2009-12-21 Thread Salameh, Mohd A., Ph.D.
ancer Research building,Rm 331 4500 San Pablo Rd Jacksonville, FL 32224 Tel: (904) 953-0046 Fax: (904) 953-0277 salameh.m...@mayo.edu ** From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of Salameh, Mohd A., Ph.D.

[ccp4bb] phenix refinement peptide bond poor geometry

2009-12-18 Thread Salameh, Mohd A., Ph.D.
Dear all, I'm about to deposit a structure into the protein data bank and I'm encountering a disturbing problem, I have a protein site where the peptide bond is not properly linked, the distance of C-N bond is 2.23 Angstrom, I tried to restrain that site by modifying my def file but the problem p

Re: [ccp4bb] backbone b-factor

2009-09-16 Thread Salameh, Mohd A., Ph.D.
Road Jacksonville, FL 32224 Tel:(904) 953-0046 Fax:(904) 953-0277 salameh.m...@mayo.edu -Original Message- From: Eleanor Dodson [mailto:c...@ysbl.york.ac.uk] Sent: Wednesday, September 16, 2009 5:14 AM To: Salameh, Mohd A., Ph.D. Cc: C

[ccp4bb] backbone b-factor

2009-09-15 Thread Salameh, Mohd A., Ph.D.
Dear All, I would like to prepare a plot showing the b-factor of only the alpha carbon and/or the backbone atoms and I wonder if somebody knows a module or software that I can use, I tried the structure analysis/Temperature factor analysis module in CCP4 but it plots the average b-factor of all ato

Re: [ccp4bb] differences between Rsym and Rmerge

2008-01-18 Thread Salameh, Mohd A., Ph.D.
Thank you all, it was very, very helpful discussion. However, I collected crystal data and the Rmerge overall was very high around 0.17 at 2.6A resolution and I'm wondering what is the acceptable value (range) of R-merge that worth the time to continue processing! Very anxious to hear your thoughts

[ccp4bb] differences between Rsym and Rmerge

2008-01-18 Thread Salameh, Mohd A., Ph.D.
Hi everybody! I will appreciate it if anybody can clarify to me the differences between Rmerge and Rsym. Many thanks, M Mohammed A. Salameh, Ph.D. Mayo Clinic Cancer Center Griffin Cancer Research Building 4500 San Pablo Road Jacksonville, FL 32