Re: [ccp4bb] Flexible proline?

2007-10-17 Thread Artem Evdokimov
Did you confirm this mutation rigorously? Specifically do the DNA sequencing results (at least double strand sequencing) and the MS of the purified protein agree with the expected mutation? Better be safe than sorry. Regards, Artem -Original Message- From: CCP4 bulletin board [mailto:[E

Re: [ccp4bb] Flexible proline?

2007-10-17 Thread William Scott
Dear Tiancen Hu: Two things you need to do: 1. Try refining with cis-proline and see if it fits better. 2. Construct Fo-Fc and Fc-Fo maps (coot makes this very easy). See what they are telling you. Best of luck, Bill Scott On Thu, 18 Oct 2007 09:35:44 +0800 HTC <[EMAIL PROTECTED]> wrote

Re: [ccp4bb] protein/dna complex crystal

2007-10-17 Thread Christian Biertumpfel
Hi Steve, You should definitively follow Jürgen's suggestion and try to solve the structure. If you could get an idea about the crystal packing it would help you to optimize your DNA construct. This is often critical in protein-nucleic acid crystallization. You could try to change the length of you

Re: [ccp4bb] protein/dna complex crystal

2007-10-17 Thread Juergen Bosch
W.M. B. wrote: Dear All: My protein/DNA complex crystal diffracts to 3.2 A ( in-house source). It crystalized in 20% PEG 8K, NaCaCo 6.5. I tried to add ATP, CaCl2 and spermidine. The diffaction doesn't improve. Would you please give me some advice? Thanks a lot, Steve How does

[ccp4bb] Making ensembles based on TLS motions

2007-10-17 Thread Robert Immormino
CCP4ers, We have recently become interested in the use of TLS parameters for studying protein dynamics. In particular, we would like to generate an ensemble of conformations along the TLS trajectories to use as a starting point for protein design. Before jumping into this though, I'd like to ask

[ccp4bb] protein/dna complex crystal

2007-10-17 Thread W.M. B.
Dear All: My protein/DNA complex crystal diffracts to 3.2 A ( in-house source). It crystalized in 20% PEG 8K, NaCaCo 6.5. I tried to add ATP, CaCl2 and spermidine. The diffaction doesn't improve. Would you please give me some advice? Thanks a lot, Steve

[ccp4bb] Postdoctoral position nearby Paris

2007-10-17 Thread François Ternois
A post-doctoral position for two years is available in Dr. V. Dive's lab:laboratory in the "Section of Molecular Engineering of Proteins" from the life Sciences Division of the CEA. The project deals with the development, on structural-basis, of highly potent inhibitors of zinc proteases of medica