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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Biol+Chem
2015 ; 290
(10
): 6191-202
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Oncoprotein YAP regulates the spindle checkpoint activation in a mitotic
phosphorylation-dependent manner through up-regulation of BubR1
#MMPMID25605730
Yang S
; Zhang L
; Chen X
; Chen Y
; Dong J
J Biol Chem
2015[Mar]; 290
(10
): 6191-202
PMID25605730
show ga
The transcriptional co-activator YAP (Yes-associated protein) functions as an
oncogene; however, it is largely unclear how YAP exerts its oncogenic role. In
this study, we further explored the functional significance of YAP and its
mitotic phosphorylation in the spindle checkpoint. We found that the dynamic
mitotic phosphorylation of YAP was CDC14-dependent. We also showed that YAP was
required for the spindle checkpoint activation induced by spindle poisons.
Mitotic phosphorylation of YAP was required for activation of the spindle
checkpoint. Furthermore, enhanced expression of active YAP hyperactivated the
spindle checkpoint and induced mitotic defects in a mitotic
phosphorylation-dependent manner. Mechanistically, we documented that mitotic
phosphorylation of YAP controlled transcription of genes associated with the
spindle checkpoint. YAP constitutively associated with BubR1 (BUB1-related
protein kinase), and knockdown of BubR1 relieved YAP-driven hyperactivation of
the spindle checkpoint. Finally, we demonstrated that YAP promoted epithelial
cell invasion via both mitotic phosphorylation and BubR1-dependent mechanisms.
Together, our results reveal a novel link between YAP and the spindle checkpoint
and indicate a potential mechanism underlying the oncogenic function of YAP
through dysregulation of the spindle checkpoint.