[ccp4bb] Lysozyme/Xenon derivatives Phenix.

2012-02-02 Thread Brennan Bonnet
Hi all, I have a strange result using Phenix's AutoSol to look for xenon sites in lysozyme. For a few months now I have been trying to produce xenon derivatives of lysozyme using pressures in the range of 50-350psi and time ranges between 5-60min trying to find the sweet spot so that this

Re: [ccp4bb] Lysozyme/Xenon derivatives Phenix.

2012-02-02 Thread Jim Pflugrath
When you crystallized your lysozyme, did you have any other anomalous scattering atoms in the conditions? I am thinking of chloride ions in particular, but there could be many others. How did you distinguish between sites of xenon and sites of other kinds of atoms in your analysis? Did you

Re: [ccp4bb] Lysozyme/Xenon derivatives Phenix.

2012-02-02 Thread George Sheldrick
Dear Brennan, Since you accidentally sent your request to the CCP4bb rather than the Phenix email list, I suggest that you try SHELXC/D/E, e.g. using Thomas Schneider's HKL2MAP, to see if it gets the same answers. These programs have solved lysozyme hundreds of times. HKL2MAP will also

[ccp4bb] Off-topic: DPI and SAXS

2012-02-02 Thread Theresa H. Hsu
Hi all. Does anyone have experience in using dual polarization interferometry (DPI) to study conformation change of protein when binding ligand? How do this compare to SAXS? I exclude NMR because the protein is large 90 kDa and no crystal structure is available. Thank you. Theresa

[ccp4bb] Abstract (to be considered for oral presentation) deadline 6th Feb.2012 for 7th Int. Workshop on X-ray Radiation Damage to Biological Crystalline Samples, Diamond Light Source, 14-16th March

2012-02-02 Thread Elspeth Garman
Dear Colleague This is a reminder that for the Seventh International Workshop on X-ray Radiation Damage to Biological Crystalline Samples, Diamond Light Source 14-16th March 2012 the closing date for submission of abstracts to be considered for Oral presentations will be Monday 6th February

[ccp4bb] THANK YOU: Crack-resistant tubes for centrifugation

2012-02-02 Thread Raji Edayathumangalam
Hello Everyone, Many many thanks to all the folks who responded to my question with very good suggestions. Here's a very quick and dirty summary of the various tubes and rotors that people use without any issues: (1) 50ml Nalgene tubes for an SS-34 rotor (2) Shape-matched new Fiberlite rotors

Re: [ccp4bb] THANK YOU: Crack-resistant tubes for centrifugation

2012-02-02 Thread Artem Evdokimov
Clearly, it's better to use shape-matched rotors (I sort of assumed that you do that already!); however the BD/Falcon polyethylene tubes (conical ends) will actually change shape (flow) when placed into the round-ended rotors, if the speed is high enough -- and most of the time the tubes survive

Re: [ccp4bb] THANK YOU: Crack-resistant tubes for centrifugation

2012-02-02 Thread Artem Evdokimov
P.P.S. it also matters a LOT how you fill the tubes. Leaving too much air gap on the top is actually very likely to cause crushing of the plastic. On Thu, Feb 2, 2012 at 6:18 PM, Artem Evdokimov artem.evdoki...@gmail.com wrote: Clearly, it's better to use shape-matched rotors (I sort of assumed

[ccp4bb] off-topic: special format for multiple sequence (protein) alignment

2012-02-02 Thread WENHE ZHONG
Dear members, Apologize for this off-topic question. I am looking for a protein sequence alignment tool which is capable to generate a particular output file similar to the attached format (please see the attached picture). I have been looking at some popular programs but none of them can show

Re: [ccp4bb] off-topic: special format for multiple sequence (protein) alignment

2012-02-02 Thread Ethan Merritt
On Thursday, 02 February 2012, you wrote: Dear members, Apologize for this off-topic question. I am looking for a protein sequence alignment tool which is capable to generate a particular output file similar to the attached format (please see the attached picture). I have been looking at