[ccp4bb] normal protein in detergent?

2008-03-14 Thread Melody Lin
Dear all, sorry for the off-topic and possibly very naive question- but does anyone know what happens if normal protein is put in detergent-containing aqueous solution? how much detergent can a regular protein tolerate? I was trying to search literature but couldn't find any... Thank you greatly

Re: [ccp4bb] normal protein in detergent?

2008-03-14 Thread Becker, Joseph W
Helps sometimes, Start with: A. McPherson, S. Koszelak, H. Axelrod, J. Day, R. Williams, L. Robinson, M. McGrath and D. Cascio (1986) An experiment regarding crystallization of soluble proteins in the presence of beta-octyl glucoside. J Biol Chem 261:1969-1975. Twenty-one soluble proteins, five t

Re: [ccp4bb] normal protein in detergent?

2008-03-14 Thread R.M. Garavito
Melody, While Joe addressed the possible effects of detergents on the crystallization of proteins, the possible effects (both negative and positive) of detergents on proteins are quite variable. Often there are no general rules except to avoid ionic detergents (from anionic detergents l

[ccp4bb] Announcement: EMBO Practical course on X-ray crystal structure determination

2008-03-14 Thread Rob Meijers
Dear community,Dear community, This is an announcement for a EMBO/MAX-INF2 practical course “X-ray crystal structure determination of macromolecules” to be held at the Soleil Synchrotron near Paris (France), from the 14th-21st of September 2008. This course is mean

[ccp4bb] trim back to Cbeta in coot : summary

2008-03-14 Thread byron delabarre
Hi ccp4'ers: Thanks for the quick response on the coot side chain trimming issue. --- I received an email from Patricia Legler to try Chainsaw (a ccp4 program I'm not familiar with) and clustal to trim sidechains. Paul Emsley tweaked my scheme script which I retweak and present here . Paul

Re: [ccp4bb] Color of heme containing Xtals

2008-03-14 Thread Dominique BOURGEOIS
Hello, A more precise view on the spectroscopic signature of your crystalline heme protein can be obtained by microspectrophotometry (UV-vis absorption, Raman or fluorescence). For such studies, people are welcome to apply for using the Cryobench lab at  ESRF  (http://www.esrf.eu/UsersAndScien

[ccp4bb] energy minimise ligand model

2008-03-14 Thread Thomas Edwards
Dear BB, I have a structure of a protein domain that binds to a peptide ligand containing either a lysine or an arginine. There are homologs in the PDB with the peptide in complex both with lysine and arginine. I would like to model both alternative ligands bound to the new domain. It looks lik

[ccp4bb] exclude range within data in scala , discontinuous run in scala problem

2008-03-14 Thread hari jayaram
Hi I am trying to exclude a bad wedge of data during scaling in scala in the newest ccp4 ( fink install this morning from W.G Scotts sage.ucsc Binaries ..so they should be version 6) The batches I need are 1 to 200 and 400-720 I have clicked the "Override automatic definition of runs to mark disco

Re: [ccp4bb] exclude range within data in scala , discontinuous run in scala problem

2008-03-14 Thread Meyer, Peter
Hi. Based on your explanation it looks like you want to remove your "RUN 1 REFERENCE" and "EXCLUDE BATCH 400 TO 500" lines from your script. You might also want to try without the NAME lines on the off chance that the harvesting stuff is causing the problems. My best guess is that the "RUN 1

Re: [ccp4bb] exclude range within data in scala , discontinuous run in scala problem

2008-03-14 Thread Phil Evans
In ccp4i Scala task, click to open the "Excluded data" panel, click on "Exclude selected batches" There you can define one or more ranges of batches or lists to exclude If you just want to exclude the last part you can define a range eg 301 to 999 You don't need to explicitly define runs

Re: [ccp4bb] exclude range within data in scala , discontinuous run in scala problem

2008-03-14 Thread hari jayaram
Hi. I did try that beforehand when I tried excluding a "range" of batches with the ccp4i gui But I got an error Scala: *** Gap in "time" (rotation) *** Sorry...both versions of the protocol for handling a bad internal wedge are giving me either a "gap in rotation" error or a "Run 2 has no

[ccp4bb] Tricks to solubilize protein

2008-03-14 Thread Ju He
Dear all, Sorry for this off-topic question. I am studying a peripheral membrane protein (13kDa) by liquid state NMR, which is stable at pH 9.0 (50mM CHES pH9.0, 150mM NaCl and 1mM DTT). It crashes when I lower pH of buffer. The addition of 50mM Arg + Glu works to stabilize the protein at low pH,