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Severina

De Wikipedia, la enciclopedia libre

Estructura de la proteína severina.

Severina es una proteína de unión a actina capaz de cortar los filamentos de actina de forma dependiente de calcio, quedando tras esta actividad unida a un extremo del microfilamento. De hecho, la adición exógena de esta molécula a soluciones que contienen actina in vitro ocasiona el total desensamblaje de ésta debido a la formación de complejos de gran afinidad severina-actina. Disruptores de la dinámica de actina como la tropomiosina, faloidina y citocalasina B no afectan a su capacidad de unión a la actina; no obstante, el subfragmento 1 de la miosina sí que lo hace. La severina es también capaz de unir actina G, es decir, el monómero constituyente de los filamentos de actina.[1]​

Referencias

  1. ↑ Giffard, R.G. (1984), «Ca2 -dependent binding of severin to actin: a one-to-one complex is formed», Journal of Cell Biology 98 (5): 1796-1803, consultado el 19 de abril de 2009 .
Esta página se editó por última vez el 22 oct 2019 a las 23:34.
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