Abstract

In the plant cytoskeleton research, mammalian brain tubulin has been widely used to study plant microtubule-interacting proteins in vitro since purification of tubulins from plant sources is generally considered to be challenging and time-consuming. A convenient method for affinity purification of tubulins was devised, which utilized the TOG domains of yeast Stu2 tubulin-binding protein as an affinity ligand (Widlund et al., 2012). We showed that this so-called TOG tubulin affinity chromatography worked efficiently with plant materials, especially actively-dividing cultured cells (Hotta et al., 2016). Plant tubulins purified with the TOG method is highly assembly-competent and thus can be used in various in vitro experiments. Here, we summarize purification strategies of native or tagged plant tubulins as well as an in vitro pull-down assay to monitor their polymerization activity.

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