Role of membrane curvature in mechanoelectrical transduction: ion carriers nonactin and valinomycin sense changes in integral bending energy.
Role of membrane curvature in mechanoelectrical transduction: ion carriers nonactin and valinomycin sense changes in integral bending energy.
复制标题
膜曲率在机械电传导中的作用:离子载体非肌动蛋白和缬氨霉素感知积分弯曲能的变化。
DOI:
10.1016/j.bbamem.2006.09.016
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发表时间:
2006
期刊:
影响因子:
--
通讯作者:
Ismailov,II
中科院分区:
文献类型:
--
作者:
Shlyonsky,VGh;Markin,VS;Andreeva,I;Pedersen,SE;Simon,SA;Benos,DJ;Ismailov,II
We describe the phenomenon of mechanoelectrical transduction in macroscopic lipid bilayer membranes modified by two cation-selective ionophores, valinomycin and nonactin. We found that bulging these membranes, while maintaining the membrane tension constant, produced a marked supralinear increase in specific carrier-mediated conductance. Analyses of the mechanisms involved in mechanoelectrical transduction induced by the imposition of a hydrostatic pressure gradient or by an amphipathic compound chlorpromazine reveal similar changes in the charge carrier motility and carrier reaction rates at the interface(s). Furthermore, the relative change in membrane conductance was independent of membrane diameter, but was directly proportional to the square of membrane curvature, thus relating the observed phenomena to the bilayer bending energy. Extrapolated to biological membranes, these findings indicate that ion transport in cells can be influenced simply by changing shape of the membrane, without a change in membrane tension.
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DOI:
--
发表时间:
1993
期刊:
EXS
影响因子:
--
作者:
X. C. Yang;F. Sachs
通讯作者:
F. Sachs
DOI:
10.3109/09687688609065448
发表时间:
1986
期刊:
Membrane biochemistry
影响因子:
--
作者:
Sachs,F
通讯作者:
Sachs,F
影响因子:
2.7
作者:
M. Valverde;S. Hardy;M. Díaz
通讯作者:
M. Díaz
DOI:
10.1073/pnas.83.12.4273
发表时间:
1986
影响因子:
11.1
作者:
Bruggemann,EP;Kayalar,C
通讯作者:
Kayalar,C
影响因子:
2.4
作者:
K. Kuo;L. Bruner
通讯作者:
L. Bruner