Nystatin-induced liposome fusion. A versatile approach to ion channel reconstitution into planar bilayers.
Nystatin-induced liposome fusion. A versatile approach to ion channel reconstitution into planar bilayers.
复制标题
制霉菌素诱导的脂质体融合。
DOI:
10.1016/s0006-3495(90)82429-2
复制
发表时间:
1990
影响因子:
3.4
通讯作者:
Miller,C
中科院分区:
文献类型:
--
作者:
Woodbury,DJ;Miller,C
A simple method is described for promoting and detecting fusion of liposomes with planar bilayer membranes. Liposomes containing ergosterol are doped with the pore-forming antibiotic nystatin, and the planar bilayer is kept ergosterol-free. Under these conditions, when a transbilayer salt gradient is applied, liposomes added to the high-salt side of the bilayer elicit the appearance of abrupt conductance jumps of 5–300 pS. The increase in conductance is transient, decaying back to baseline on the order of 10 s. Each of these "spikes" represents the fusion of a single liposome with the bilayer, resulting in the simultaneous insertion of many nystatin channels. Relaxation of the conductance back to baseline occurs because ergosterol, required for the integrity of the nystatin pore, diffuses away into the sterol-free planar bilayer after liposome fusion. When Torpedo Cl- channels are reconstituted into liposomes containing ergosterol and nystatin, fusion spikes are observed simultaneously with the appearance of Cl- channels. This method allows the calculation of the density of functional ion channels in a preparation of proteoliposomes containing reconstituted channel protein.
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DOI:
10.1007/978-1-4757-1361-9_7
发表时间:
1986
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
W. Hanke
通讯作者:
W. Hanke
影响因子:
3.4
作者:
D. Woodbury;James E. Hall
通讯作者:
James E. Hall
影响因子:
7.4
作者:
F. S. Cohen
通讯作者:
F. S. Cohen
DOI:
10.1016/0005-2736(88)90321-5
发表时间:
1988
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
M. Moreno;M. Bonilla;C. Gonzalez
通讯作者:
C. Gonzalez
影响因子:
3.8
作者:
Cass, A;Finkelstein, A;Krespi, V
通讯作者:
Krespi, V