Cdc42-interacting protein 4

Definition:

Required for translocation of GLUT4 to the plasma membrane in response to insulin signaling (By similarity). Required to coordinate membrane tubulation with reorganization of the actin cytoskeleton during endocytosis. Binds to lipids such as phosphatidylinositol 4,5-bisphosphate and phosphatidylserine and promotes membrane invagination and the formation of tubules. Also promotes CDC42-induced actin polymerization by recruiting WASL/N-WASP which in turn activates the Arp2/3 complex. Actin polymerization may promote the fission of membrane tubules to form endocytic vesicles. Required for the formation of podosomes, actin-rich adhesion structures specific to monocyte-derived cells. May be required for the lysosomal retention of FASLG/FASL.

References:

[1]. S Linder, et al. Microtubule-dependent formation of podosomal adhesion structures in primary human macrophages. J Cell Sci. 2000 Dec;113 Pt 23:4165-76. [Content Brief]

[2]. Toshiki Itoh, et al. Dynamin and the actin cytoskeleton cooperatively regulate plasma membrane invagination by BAR and F-BAR proteins. Dev Cell. 2005 Dec;9(6):791-804. [Content Brief]

[3]. Jing Qian, et al. Regulation of FasL expression: a SH3 domain containing protein family involved in the lysosomal association of FasL. Cell Signal. 2006 Aug;18(8):1327-37. [Content Brief]

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