Engineering a rigid protein tunnel for biomolecular detection.
Engineering a rigid protein tunnel for biomolecular detection.
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工程刚性蛋白隧道进行生物分子检测。
DOI:
10.1021/ja3043646
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发表时间:
2012-06-06
影响因子:
15
通讯作者:
Movileanu, Liviu
中科院分区:
文献类型:
--
作者:
Mohammad, Mohammad M.;Iyer, Raghuvaran;Howard, Khalil R.;McPike, Mark P.;Borer, Philip N.;Movileanu, Liviu
One intimidating challenge in protein nanopore-based technologies is designing robust protein scaffolds that remain functionally intact under a broad spectrum of detection conditions. Here, we show that an extensively engineered bacterial ferric hydroxamate uptake component A (FhuA), a β-barrel membrane protein, functions as a robust protein tunnel for the sampling of biomolecular events. The key implementation in this work was the coupling of direct genetic engineering with a refolding approach to produce an unusually stable protein nanopore. More importantly, this nanostructure maintained its stability under many experimental circumstances, some of which, including low ion concentration and highly acidic aqueous phase, are normally employed to gate, destabilize or unfold β-barrel membrane proteins. To demonstrate these advantageous traits, we show that the engineered FhuA-based protein nanopore functioned as a sensing element for examining the proteolytic activity of an enzyme at highly acidic pH and for determining the kinetics of protein-DNA aptamer interactions at physiological salt concentration.
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影响因子:
2.9
作者:
通讯作者:
--
影响因子:
38.3
作者:
通讯作者:
--
DOI:
10.1073/pnas.0711561105
发表时间:
2008-04-29
影响因子:
11.1
作者:
Chen, Min;Khalid, Syma;Bayley, Hagan
通讯作者:
Bayley, Hagan
DOI:
10.1073/pnas.1001831107
发表时间:
2010-09-14
影响因子:
11.1
作者:
Derrington, Ian M.;Butler, Tom Z.;Gundlach, Jens H.
通讯作者:
Gundlach, Jens H.
影响因子:
5.7
作者:
Ferguson, AD;Ködding, J;Welte, W
通讯作者:
Welte, W