Re: [ccp4bb] Thrombin cleavage of membrane protein with fusion tag

2013-02-20 Thread Raji Edayathumangalam
Dear Pascal and Toufic, Many thanks to both of you for the pointers. Toufic, I actually poked around online and bought exactly the same kit that you are suggesting, especially because the beads are reusable. So your experience is reassuring. So I'll find out soon. I also plan to play around with

Re: [ccp4bb] Thrombin cleavage of membrane protein with fusion tag

2013-02-20 Thread Toufic El Arnaout
Hi Raji, I addition to the tips from Pascal, I would like to say that for a memb protein I worked on with a his-tag separated by a thrombin site, I used thrombin cross linked to agarose from Sigma (1 mL). The beads can be collected, washed and reequilibrated, making it ready for use so many times.

Re: [ccp4bb] Thrombin cleavage of membrane protein with fusion tag

2013-02-20 Thread Pascal Egea
Hi Raji, Thrombin is a rather good protease and behaves well in a large set of different detergents ( there is a paper by Michael Wiener that describes the relative efficiencies of several usual proteases, amongst those thrombin is inlcuded, used routinely for cleavage of membrane protein fusions

[ccp4bb] Thrombin cleavage of membrane protein with fusion tag

2013-02-20 Thread Raji Edayathumangalam
Hi Folks, Sorry this isn't a non-ccp4 post. I am working with a membrane protein for which I am finally able to scale up expression. I am now also able to partially purify my protein from a medium-scale (12-18L) bacterial culture using a two-step tandem affinity purification protocol (Talon follo