Re: [ccp4bb] question on the effect of a fire alarm on crystallization

2010-01-22 Thread Djordje Francuski
I guess the crystals will be "safe but freaked out". I think handling the crystal trays is a process which would much more influence the crystal growth. Do you ask because you have frequent fire drills or your colleagues have a affinity for arson? Sorry for the jokes, could not resist. Cheers,

Re: [ccp4bb] Running Resolve after Sharp?

2008-08-21 Thread Djordje Francuski
ed also in SHARP) is good for high resolution data but is very strict in its data quality requests. What is your resolution? Do you have problems with the output of the ARP/wARP at the end of autoSHARP? Good luck, Djordje Francuski What is the resolution of your data? > Hi > > Sorry for

Re: [ccp4bb] PDB beta-sheet definition tool wanted

2008-09-11 Thread Djordje Francuski
Your question just reminded me of this little tool that is nice to have. Now this script does not really do what you ask but someone might need a script for extracting basic secondary structure info from dssp format to the pdb format. If anyone has something better, please share. Take a look at Jam

Re: [ccp4bb] Protein-DNA complex prepartion for crystallization

2008-10-02 Thread Djordje Francuski
Just wandering, is your DNA dissolved in a buffered solution or just water? I would suggest to buffer your DNA solution prior mixing with the protein. Otherwise I guess that your pH in the protein-DNA mix is lower then the expected pH7.0 and maybe your protein does not like it. Cheers, Djordje >

Re: [ccp4bb] can I try crystallization in high salt?

2009-07-03 Thread Djordje Francuski
In short, yes you can. Although it is often avoided due to the limitations that high salt samples may have, you still have a good chance to crystallize the protein in the original high salt buffer. In my case a small alcohol was the best precipitating agent. As with most proteins, try it, try it, t

Re: [ccp4bb] stabilizing solution

2009-09-13 Thread Djordje Francuski
Crush, pippet up and down, dilute as needed (I used 1:200) and vortex. Actually anything works... as everything - protein dependent. For the stabilizing solution I have used the same as the reservoir solution (20%MPD, 250 mM NaCl, 0.1 M HEPES pH 7.5) or 2% more MPD. Worked fine and the seeds were