Mode of Ezrin-Membrane Interaction as a Function of PIP2 Binding and Pseudophosphorylation.
Mode of Ezrin-Membrane Interaction as a Function of PIP2 Binding and Pseudophosphorylation.
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Ezrin-膜相互作用模式作为 PIP2 结合和假磷酸化的函数
DOI:
10.1016/j.bpj.2016.05.009
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发表时间:
2016
影响因子:
3.4
通讯作者:
Steinem
中科院分区:
文献类型:
--
作者:
Shabardina;Kramer;Gerdes;Braunger;Cordes;Schäfer;Steinem
Ezrin, a protein of the ezrin, radixin, moesin (ERM) family, provides a regulated linkage between the plasma membrane and the cytoskeleton. The hallmark of this linkage is the activation of ezrin by phosphatidylinositol-4,5-bisphosphate (PIP2) binding and a threonine phosphorylation at position 567. To analyze the influence of these activating factors on the organization of ezrin on lipid membranes and the proposed concomitant oligomer-monomer transition, we made use of supported lipid bilayers in conjunction with atomic force microscopy and fluorescence microscopy. Bilayers doped with either PIP2as the natural receptor lipid of ezrin or a Ni-nitrilotriacetic acid-equipped lipid to bind the proteins via their His6-tags to the lipid membrane were used to bind two different ezrin variants: ezrin wild-type and ezrin T567D mimicking the phosphorylated state. Using a combination of reflectometric interference spectroscopy, atomic force microscopy, and Förster resonance energy transfer experiments, we show that only the ezrin T567D mutant, upon binding to PIP2-containing bilayers, undergoes a remarkable conformational change, which we attribute to an opening of the conformation resulting in monomeric protein on the lipid bilayer.
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影响因子:
3.9
作者:
Viswanatha R;Bretscher A;Garbett D
通讯作者:
Garbett D
影响因子:
2.9
作者:
Janke, Matthias;Herrig, Alexander;Janshoff, Andreas
通讯作者:
Janshoff, Andreas
影响因子:
4.8
作者:
Ben-Aissa, Khadija;Patino-Lopez, Genaro;Shaw, Stephen
通讯作者:
Shaw, Stephen
影响因子:
4.8
作者:
Braunger, Julia A.;Brueckner, Bastian R.;Steinem, Claudia
通讯作者:
Steinem, Claudia
影响因子:
2.9
作者:
Chambers, DN;Bretscher, A
通讯作者:
Bretscher, A