Re: [ccp4bb] Off topic-Detection of protein protein interactions & crystallization of weak binding partners

2010-09-21 Thread James Qiu
er. Why not try a quantitative method (ITC, SPR) > provided you have access of course. > > sincerely, > > Filip Van Petegem > > > > On Tue, Sep 21, 2010 at 12:01 PM, James Qiu wrote: > Dear All, > > Firstly, sorry for the non-crystallography question but I

[ccp4bb] Off topic-Detection of protein protein interactions & crystallization of weak binding partners

2010-09-21 Thread James Qiu
example millimolar affinity, does that decrease the chances of co-crystallizing the two interacting? Thank you in advance, Sincerely, James Qiu

Re: [ccp4bb] Heme Proteins

2010-08-26 Thread James Qiu
Hari, I have expressed sulfite oxidase (with a N-terminal heme) in E. coli strain TP1000 which resulted in red protein. I did not supplement the media with iron or a porphyrin precursor. Sincerely, James On Aug 26, 2010, at 12:56 PM, Hari Namboodiri wrote: > Hi CCPers > > Can anyone provi

Re: [ccp4bb] Judging a PDB

2010-07-13 Thread James Qiu
Dear Pranjal, Some measure of a structure's "quality" compared to another is the number of rotamer outliers, bad bond angles, ramachandran outliers and interpenetrating atoms or "clashes" in a given structure. I would suggest using the Molprobity website http://molprobity.biochem.duke.edu/ r