CLIP-associating protein 1

Definition:

Microtubule plus-end tracking protein that promotes the stabilization of dynamic microtubules. Involved in the nucleation of noncentrosomal microtubules originating from the trans-Golgi network (TGN). Required for the polarization of the cytoplasmic microtubule arrays in migrating cells towards the leading edge of the cell. May act at the cell cortex to enhance the frequency of rescue of depolymerizing microtubules by attaching their plus-ends to cortical platforms composed of ERC1 and PHLDB2. This cortical microtubule stabilizing activity is regulated at least in part by phosphatidylinositol 3-kinase signaling. Also performs a similar stabilizing function at the kinetochore which is essential for the bipolar alignment of chromosomes on the mitotic spindle.

References:

[1]. Helder Maiato, et al. Human CLASP1 is an outer kinetochore component that regulates spindle microtubule dynamics. Cell. 2003 Jun 27;113(7):891-904. [Content Brief]

[2]. Andrey Efimov, et al. Asymmetric CLASP-dependent nucleation of noncentrosomal microtubules at the trans-Golgi network. Dev Cell. 2007 Jun;12(6):917-30. [Content Brief]

[3]. Yuko Mimori-Kiyosue, et al. Mammalian CLASPs are required for mitotic spindle organization and kinetochore alignment. Genes Cells. 2006 Aug;11(8):845-57. [Content Brief]

[4]. Yuko Mimori-Kiyosue, et al. CLASP1 and CLASP2 bind to EB1 and regulate microtubule plus-end dynamics at the cell cortex. J Cell Biol. 2005 Jan 3;168(1):141-53. [Content Brief]

[5]. Ana L Pereira, et al. Mammalian CLASP1 and CLASP2 cooperate to ensure mitotic fidelity by regulating spindle and kinetochore function. Mol Biol Cell. 2006 Oct;17(10):4526-42. [Content Brief]

[6]. A Akhmanova, et al. Clasps are CLIP-115 and -170 associating proteins involved in the regional regulation of microtubule dynamics in motile fibroblasts. Cell. 2001 Mar 23;104(6):923-35. [Content Brief]

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