The natural product cucurbitacin E inhibits depolymerization of actin filaments.
The natural product cucurbitacin E inhibits depolymerization of actin filaments.
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DOI:
10.1021/cb300254s
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发表时间:
2012-09-21
影响因子:
4
通讯作者:
Eggert, Ulrike S.
中科院分区:
文献类型:
--
作者:
Soerensen, Pia M.;Iacob, Roxana E.;Fritzsche, Marco;Engen, John R.;Brieher, William M.;Charras, Guillaume;Eggert, Ulrike S.
Although small molecule actin modulators have been widely used as research tools, only one cell permeable small molecule inhibitor of actin depolymerization (jasplakinolide) is commercially available. We report that the natural product cucurbitacin E inhibits actin depolymerization and show that its mechanism of action is different from jasplakinolide. In assays using pure fluorescently labeled actin, cucurbitacin E specifically affected depolymerization without affecting polymerization. It inhibited actin depolymerization at sub-stoichiometric concentrations up to 1:6 cucurbitacin:actin E. Cucurbitacin E specifically binds to filamentous actin (F-actin) forming a covalent bond at residue Cys257, but not to monomeric actin (G-actin). Based on its compatibility with phalloidin staining, we show that cucurbitacin E occupies a different binding site on actin filaments. Using loss of fluorescence after localized photoactivation, we found that cucurbitacin E inhibited actin depolymerization in live cells. Cucurbitacin E is a widely available plant-derived natural product, making it a useful tool to study actin dynamics in cells and actin-based processes such as cytokinesis.
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影响因子:
3.7
作者:
Knecht DA;LaFleur RA;Kahsai AW;Argueta CE;Beshir AB;Fenteany G
通讯作者:
Fenteany G
DOI:
10.1038/nrm2867
发表时间:
2010-04
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1016/j.cub.2011.12.010
发表时间:
2012-02-07
期刊:
Current biology : CB
影响因子:
--
作者:
Galkin VE;Orlova A;Egelman EH
通讯作者:
Egelman EH
影响因子:
16
作者:
Andrianantoandro, Ernesto;Pollard, Thomas D.
通讯作者:
Pollard, Thomas D.
影响因子:
5.8
作者:
Graness, Angela;Poli, Valeria;Goppelt-Struebe, Margarete
通讯作者:
Goppelt-Struebe, Margarete