Re: [ccp4bb] Active aggregates?

2009-08-29 Thread Parthasarathy Sampathkumar
Hi Toyoyuki, If your protein bind to metal ions you could try low concentration of chelating agents in the purification and storage buffer. Take a look at the following reference: Chelating Agents Stabilize the Monomeric State of the Zinc Binding Human Papillomavirus 16 E6 Oncoprotein Degenkolbe

Re: [ccp4bb] Active aggregates?

2009-08-29 Thread Xuan Yang
Dear Ose, I think we have met similar problems. My protein is relatively small, ~17kD, but it could form aggregates larger than 100nm. A classic Protein Science paper in 2003 by DR Smith titled "Crystal structures of fusion proteins with large-affinity tags" offered me great help. With MBP tag and

Re: [ccp4bb] Active aggregates?

2009-08-29 Thread Xuan Yang
Dear James, Could you provide the reference of your success story? My protein also formed large soluble aggregates and I am desperate for such successful stories! By the way, have your performed DLS to your protein? What about the polydispensity? Is it lower than 20%? Thanks in advance! Sincere

Re: [ccp4bb] Refmac Problem - Permission Denied

2009-08-29 Thread Roger Rowlett
Does it work with NFS v.3? Cheers. --Original Message-- From: David Jones Sender: CCP4 bulletin board To: CCP4BB@JISCMAIL.AC.UK ReplyTo: David Jones Subject: [ccp4bb] Refmac Problem - Permission Denied Sent: Aug 29, 2009 3:32 PM I would appreciate if any one has any ideas on this I hav

[ccp4bb] Refmac Problem - Permission Denied

2009-08-29 Thread David Jones
I would appreciate if any one has any ideas on this I have a strange NFS related problem, if anyone has any ideas... I am running refmac with the ccp4 directories mounted on an nfs share (v4) mounted under /usr/local I get the following error... #CCP4I TERMINATION STATUS 0 Last system er

Re: [ccp4bb] Problem with Coot reading monomer library file.

2009-08-29 Thread Peter Chan
Dear Eric, Thank you very much for your suggestion. It worked. Dear Paul, Thank you for your kind offer with the help (and for writing such a wonderful program + providing users with support!). I will compare the cif files and see if I can pick out the differences... Sincerely, Peter Hi