Tank binding kinase 1 is a centrosome-associated kinase necessary for microtubule
dynamics and mitosis
#MMPMID26656453
Pillai S
; Nguyen J
; Johnson J
; Haura E
; Coppola D
; Chellappan S
Nat Commun
2015[Dec]; 6
(?): 10072
PMID26656453
show ga
TANK Binding Kinase 1 (TBK1) is a non-canonical I?B kinase that contributes to
KRAS-driven lung cancer. Here we report that TBK1 plays essential roles in
mammalian cell division. Specifically, levels of active phospho-TBK1 increase
during mitosis and localize to centrosomes, mitotic spindles and midbody, and
selective inhibition or silencing of TBK1 triggers defects in spindle assembly
and prevents mitotic progression. TBK1 binds to the centrosomal protein CEP170
and to the mitotic apparatus protein NuMA, and both CEP170 and NuMA are TBK1
substrates. Further, TBK1 is necessary for CEP170 centrosomal localization and
binding to the microtubule depolymerase Kif2b, and for NuMA binding to dynein.
Finally, selective disruption of the TBK1-CEP170 complex augments microtubule
stability and triggers defects in mitosis, suggesting that TBK1 functions as a
mitotic kinase necessary for microtubule dynamics and mitosis.