Measuring membrane penetration with depth-dependent fluorescence quenching: distribution analysis is coming of age.
Measuring membrane penetration with depth-dependent fluorescence quenching: distribution analysis is coming of age.
复制标题
通过深度依赖性荧光猝灭测量膜渗透:分布分析即将成熟。
DOI:
10.1016/j.bbamem.2014.02.019
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发表时间:
2014-09
影响因子:
3.4
通讯作者:
Ladokhin, Alexey S.
中科院分区:
文献类型:
--
作者:
Ladokhin, Alexey S.
关键词:
Depth-dependent fluorescence quenching by lipid-attached quenchers (e.g., bromine atoms or doxyl groups) is an important tool for determining the penetration of proteins and peptides into lipid bilayers. Extracting quantitative information and accurate calculations of the depth of the fluorophore are complicated by thermal disorder, resulting in broad distributions of the transverse positions of both quenchers and fluorophores. Twenty-one years ago a methodology called Distribution Analysis (DA) was introduced, based on the emerging view of the complexity of the transverse organization of lipid bilayer structure. The method is aimed at extracting quantitative information on membrane penetration, such as position and width of fluorophore's distribution along the depth coordinate and its exposure to the lipid phase. Here we review recent progress in refining the DA method and illustrate its applications to protein-membrane interactions. We demonstrate how basic assumptions of the DA approach can be validated using molecular dynamics simulations and how the precision of depth determination is improved by applying a new protocol based on a combination of steady-state and time-resolved fluorescence quenching. Using the example of the MPER fragment of the membrane-spanning domain of the HIV-1 gp41 fusion protein, we illustrate how DA applications and computer simulations can be used together to reveal the molecular organization of a protein-membrane complex.
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DOI:
10.1099/vir.0.046508-0
发表时间:
2013-01
期刊:
The Journal of general virology
影响因子:
--
作者:
Steckbeck JD;Kuhlmann AS;Montelaro RC
通讯作者:
Montelaro RC
DOI:
10.1016/j.jmr.2010.08.012
发表时间:
2010-11
期刊:
Journal of magnetic resonance (San Diego, Calif. : 1997)
影响因子:
--
作者:
Chu S;Maltsev S;Emwas AH;Lorigan GA
通讯作者:
Lorigan GA
影响因子:
15
作者:
Nielsen, RD;Che, KP;Robinson, BH
通讯作者:
Robinson, BH
影响因子:
64.8
作者:
Phillips, LR;Milescu, M;Swartz, KJ
通讯作者:
Swartz, KJ
影响因子:
2.9
作者:
CHATTOPADHYAY, A;LONDON, E
通讯作者:
LONDON, E