TY - JOUR T1 - FAM83D directs protein kinase CK1α to the mitotic spindle for proper spindle positioning JF - bioRxiv DO - 10.1101/480616 SP - 480616 AU - Luke J. Fulcher AU - Zhengcheng He AU - Lin Mei AU - Thomas J. Macartney AU - Nicola T. Wood AU - Alan R. Prescott AU - Arlene J. Whigham AU - Joby Varghese AU - Robert Gourlay AU - Graeme Ball AU - Rosemary Clarke AU - David G. Campbell AU - Christopher A. Maxwell AU - Gopal P. Sapkota Y1 - 2018/01/01 UR - http://biorxiv.org/content/early/2018/11/27/480616.abstract N2 - The concerted action of many protein kinases helps orchestrate the error-free progression through mitosis of mammalian cells. The roles and regulation of some prominent mitotic kinases, such as cyclin-dependent kinases, are well-established. However, these and other known mitotic kinases alone cannot account for the extent of protein phosphorylation that has been reported during mammalian mitosis. Here we demonstrate that CK1α, of the casein kinase 1 family of protein kinases, localises to the spindle and is required for proper spindle-positioning and timely cell division. CK1α is recruited to the spindle by FAM83D, and cells devoid of FAM83D, or those harbouring CK1α-binding-deficient FAM83DF283A/F283A knockin mutation, display pronounced spindle-positioning defects, and a prolonged mitosis. Restoring FAM83D at the endogenous locus in FAM83D-/- cells, or artificially delivering CK1α to the spindle in FAM83DF283A/F283A cells, rescues these defects. These findings implicate CK1α as new mitotic kinase that orchestrates the kinetics and orientation of cell division. ER -