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2014 ; 26
(3
): 358-373
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PKD1 phosphorylation-dependent degradation of SNAIL by SCF-FBXO11 regulates
epithelial-mesenchymal transition and metastasis
#MMPMID25203322
Zheng H
; Shen M
; Zha YL
; Li W
; Wei Y
; Blanco MA
; Ren G
; Zhou T
; Storz P
; Wang HY
; Kang Y
Cancer Cell
2014[Sep]; 26
(3
): 358-373
PMID25203322
show ga
Metastatic dissemination is often initiated by the reactivation of an embryonic
development program referred to as epithelial-mesenchymal transition (EMT). The
transcription factor SNAIL promotes EMT and elicits associated pathological
characteristics such as invasion, metastasis, and stemness. To better understand
the posttranslational regulation of SNAIL, we performed a luciferase-based,
genome-wide E3 ligase siRNA library screen and identified SCF-FBXO11 as an
important E3 that targets SNAIL for ubiquitylation and degradation. Furthermore,
we discovered that SNAIL degradation by FBXO11 is dependent on Ser-11
phosphorylation of SNAIL by protein kinase D1 (PKD1). FBXO11 blocks SNAIL-induced
EMT, tumor initiation, and metastasis in multiple breast cancer models. These
findings establish the PKD1-FBXO11-SNAIL axis as a mechanism of posttranslational
regulation of EMT and cancer metastasis.