I don't understand what you are trying to do-are you trying to show, by the difference in ITC response, that the predictions you made about the oligomerization are true?
JPK +++++++++++++++++++++++++++++++++++++++++++++++++ Jacob Pearson Keller Research Scientist / Looger Lab HHMI Janelia Research Campus 19700 Helix Dr, Ashburn, VA 20147 Desk: (571)209-4000 x3159 Cell: (301)592-7004 +++++++++++++++++++++++++++++++++++++++++++++++++ The content of this email is confidential and intended for the recipient specified in message only. It is strictly forbidden to share any part of this message with any third party, without a written consent of the sender. If you received this message by mistake, please reply to this message and follow with its deletion, so that we can ensure such a mistake does not occur in the future. From: CCP4 bulletin board <CCP4BB@JISCMAIL.AC.UK> On Behalf Of Bernhard Rupp Sent: Thursday, October 3, 2019 11:06 AM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] ITC question -dimer vs monomer Hi Fellows, please let me ask the respective experts an ITC question: I have 2 proteins, stable and dialyzed in identical buffer. A is a monomer and B an obligate dimer. I suspect that eventually a A2B2 dimer will form. Intuitively, it should make a difference whether I titrate the dimer with the monomer or vice versa. In the first case, a momomer would initially meet a lot of free dimers, and I would expect that randomly, a AB2 complex is more likely to form than a A2B2 (let's disregard any more complex colligative/cooperative effects). If I drip the dimer into the monomer pool, it is quite likely that the B dimer meets 2 free As, and I get right away a higher population of A2B2s. Maybe at dilutions of ITC and with sufficient equilibration that is not an issue at all (again, absent any cooperative effects that might alter the first Kd vs. the second, despite the sites on the dimer are at least initially equivalent). Can someone guide me towards literature about this or perhaps share some first-hand experience? Many thanks, BR ------------------------------------------------------ Bernhard Rupp http://www.hofkristallamt.org/<https://urldefense.com/v3/__http:/www.hofkristallamt.org/__;!oCotSwSxbw8!SE9mT6grUy1tHFSKLCraXt4bhlDri03OEMEyqQUCLAVSLsg3vwn0GTQtxbStgtNvxBs$> b...@hofkristallamt.org<mailto:b...@hofkristallamt.org> +1 925 209 7429 +43 676 571 0536 ------------------------------------------------------ Many plausible ideas vanish at the presence of thought ------------------------------------------------------ ________________________________ To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1<https://urldefense.com/v3/__https:/www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1__;!oCotSwSxbw8!SE9mT6grUy1tHFSKLCraXt4bhlDri03OEMEyqQUCLAVSLsg3vwn0GTQtxbStkIPgsQE$> ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1
