An ULK1/2-PXN mechanotransduction pathway suppresses breast cancer cell migration

The remodeling and stiffening of the extracellular matrix (ECM) is a well-recognized modulator of breast cancer progression. How changes in the mechanical properties of the ECM are converted into biochemical signals that direct tumor cell migration and metastasis remain poorly characterized. Here, w...

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Veröffentlicht in:EMBO reports 2023-11, Vol.24 (11), p.e56850
Hauptverfasser: Liang, Peigang, Zhang, Jiaqi, Wu, Yuchen, Zheng, Shanyuan, Xu, Zhaopeng, Yang, Shuo, Wang, Jinfang, Ma, Suibin, Xiao, Li, Hu, Tianhui, Jiang, Wenxue, Huang, Chaoqun, Xing, Qiong, Kundu, Mondira, Wang, Bo
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container_title EMBO reports
container_volume 24
creator Liang, Peigang
Zhang, Jiaqi
Wu, Yuchen
Zheng, Shanyuan
Xu, Zhaopeng
Yang, Shuo
Wang, Jinfang
Ma, Suibin
Xiao, Li
Hu, Tianhui
Jiang, Wenxue
Huang, Chaoqun
Xing, Qiong
Kundu, Mondira
Wang, Bo
description The remodeling and stiffening of the extracellular matrix (ECM) is a well-recognized modulator of breast cancer progression. How changes in the mechanical properties of the ECM are converted into biochemical signals that direct tumor cell migration and metastasis remain poorly characterized. Here, we describe a new role for the autophagy-inducing serine/threonine kinases ULK1 and ULK2 in mechanotransduction. We show that ULK1/2 activity inhibits the assembly of actin stress fibers and focal adhesions (FAs) and as a consequence impedes cell contraction and migration, independent of its role in autophagy. Mechanistically, we identify PXN/paxillin, a key component of the mechanotransducing machinery, as a direct binding partner and substrate of ULK1/2. ULK-mediated phosphorylation of PXN at S32 and S119 weakens homotypic interactions and liquid-liquid phase separation of PXN, impairing FA assembly, which in turn alters the mechanical properties of breast cancer cells and their response to mechanical stimuli. ULK1/2 and the well-characterized PXN regulator, FAK/Src, have opposing functions on mechanotransduction and compete for phosphorylation of adjacent serine and tyrosine residues. Taken together, our study reveals ULK1/2 as important regulator of PXN-dependent mechanotransduction.
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subjects Actin
Assembly
Autophagy
Autophagy-Related Protein-1 Homolog - genetics
Autophagy-Related Protein-1 Homolog - metabolism
Binding
Biomaterials
Biomedical materials
Breast cancer
Breast Neoplasms
Cell adhesion & migration
Cell migration
Cell Movement
Extracellular matrix
Female
Fibers
Humans
Intracellular Signaling Peptides and Proteins - metabolism
Kinases
Liquid phases
Mechanical properties
Mechanical stimuli
Mechanotransduction
Mechanotransduction, Cellular
Metastases
Paxillin
Paxillin - metabolism
Phase separation
Phosphorylation
Serine
Serine - metabolism
Src protein
Stiffening
Substrates
Threonine
Tyrosine
title An ULK1/2-PXN mechanotransduction pathway suppresses breast cancer cell migration
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