A role of complexin-lipid interactions in membrane fusion.

A role of complexin-lipid interactions in membrane fusion.
复制标题

DOI:
10.1016/j.febslet.2009.06.025
复制
发表时间:
2009-07-21
期刊:
影响因子:
3.5
通讯作者:
Soellner, Thomas H.
Soellner, Thomas H.
中科院分区:
生物学3区
文献类型:
--
作者:
Seiler, Florian;Malsam, Joerg;Krause, Jean Michel;Soellner, Thomas H.
关键词:

文献摘要

参考文献

被引文献

相似文献

复合素和突触素调节钙依赖的胞吐作用。复合体中的中央螺旋赋予SNARE融合机制特定的结合。氨基末端区域的一个辅助螺旋通过阻止SNAREpin拉链来抑制膜融合。我们现在证明,在脂质体融合实验中,复合蛋白I羧基末端区域的两亲性螺旋结合脂双层并影响SNARE介导的脂混合。用带电残基取代螺旋中的疏水氨基酸,可以消除脂类相互作用和络合素I在脂质体融合中的刺激作用。相比之下,大体积疏水氨基酸色氨酸的引入刺激了脂质结合和脂质体融合。这一数据表明,局部络合蛋白-脂质相互作用可以在膜融合中发挥作用。
Complexins and synaptotagmins regulate calcium-dependent exocytosis. A central helix in complexin confers specific binding to the SNARE fusion machinery. An accessory helix in the amino-terminal region inhibits membrane fusion by blocking SNAREpin zippering. We now show that an amphipathic helix in the carboxy-terminal region of complexin I binds lipid bilayers and affects SNARE-mediated lipid mixing in a liposome fusion assay. The substitution of a hydrophobic amino acid within the helix by a charged residue abolishes the lipid interaction and the stimulatory effect of complexin I in liposome fusion. In contrast, the introduction of the bulky hydrophobic amino acid tryptophan stimulates lipid binding and liposome fusion. This data shows that local complexin-lipid interactions can play a role in membrane fusion.
DOI: 10.1126/science.1166500
发表时间: 2009-01-23
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Giraudo CG;Garcia-Diaz A;Eng WS;Chen Y;Hendrickson WA;Melia TJ;Rothman JE
通讯作者: Rothman JE
DOI: 10.1038/nsmb1292
发表时间: 2007-10
影响因子: 16.8
作者:
Xue M;Reim K;Chen X;Chao HT;Deng H;Rizo J;Brose N;Rosenmund C
通讯作者: Rosenmund C
DOI: 10.1038/35025084
发表时间: 2000-09-14
期刊: NATURE
影响因子: 64.8
作者:
Fukuda, R;McNew, JA;Söllner, TH
通讯作者: Söllner, TH
DOI: 10.1038/nn1980
发表时间: 2007-10-01
影响因子: 25
作者:
Huntwork, Sarah;Littleton, J. Troy
通讯作者: Littleton, J. Troy
DOI: 10.1126/science.1084909
发表时间: 2003-06-13
期刊: SCIENCE
影响因子: 56.9
作者:
Hu, C;Ahmed, M;Rothman, JE
通讯作者: Rothman, JE