FhuA interactions in a detergent-free nanodisc environment.
FhuA interactions in a detergent-free nanodisc environment.
复制标题
FhuA 在无去污剂的纳米盘环境中相互作用。
DOI:
10.1016/j.bbamem.2013.09.022
复制
发表时间:
2014
期刊:
影响因子:
--
通讯作者:
F. Duong
中科院分区:
文献类型:
--
作者:
Allan Mills;Hai;J. Coulton;F. Duong
TonB-dependent membrane receptors from bacteria have been analyzed in detergent-containing solution, an environment that may influence the role of ligand in inducing downstream interactions. We report reconstitution of FhuA into a membrane mimetic: nanodiscs. In contrast to previous results in detergent, we show that binding of TonB to FhuA in nanodiscs depends strongly on ferricrocin. The stoichiometry of interaction is 1:1 and the binding constant KDis ~ 200 nM; an equilibrium affinity that is ten-fold lower than reported in detergent. FhuA in nanodiscs also forms a high-affinity binding site for colicin M (KD~ 3.5 nM), while ferricrocin renders FhuA refractory to colicin binding. Together, these results demonstrate the importance of the ligand in regulating receptor interactions and the advantages of nanodiscs to study β-barrel membrane proteins in a membrane-like environment.
登录
查看更多内容
影响因子:
15
作者:
Denisov, IG;Grinkova, YV;Sligar, SG
通讯作者:
Sligar, SG
影响因子:
2.9
作者:
Freed DM;Lukasik SM;Sikora A;Mokdad A;Cafiso DS
通讯作者:
Cafiso DS
影响因子:
15
作者:
Fanucci, GE;Lee, JY;Cafiso, DS
通讯作者:
Cafiso, DS
影响因子:
15
作者:
Hagn, Franz;Etzkorn, Manuel;Raschle, Thomas;Wagner, Gerhard
通讯作者:
Wagner, Gerhard