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2017 ; 6
(ä): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Ambra1 spatially regulates Src activity and Src/FAK-mediated cancer cell invasion
via trafficking networks
#MMPMID28362576
Schoenherr C
; Byron A
; Sandilands E
; Paliashvili K
; Baillie GS
; Garcia-Munoz A
; Valacca C
; Cecconi F
; Serrels B
; Frame MC
Elife
2017[Mar]; 6
(ä): ä PMID28362576
show ga
Here, using mouse squamous cell carcinoma cells, we report a completely new
function for the autophagy protein Ambra1 as the first described 'spatial
rheostat' controlling the Src/FAK pathway. Ambra1 regulates the targeting of
active phospho-Src away from focal adhesions into autophagic structures that
cancer cells use to survive adhesion stress. Ambra1 binds to both FAK and Src in
cancer cells. When FAK is present, Ambra1 is recruited to focal adhesions,
promoting FAK-regulated cancer cell direction-sensing and invasion. However, when
Ambra1 cannot bind to FAK, abnormally high levels of phospho-Src and phospho-FAK
accumulate at focal adhesions, positively regulating adhesion and invasive
migration. Spatial control of active Src requires the trafficking proteins
Dynactin one and IFITM3, which we identified as Ambra1 binding partners by
interaction proteomics. We conclude that Ambra1 is a core component of an
intracellular trafficking network linked to tight spatial control of active Src
and FAK levels, and so crucially regulates their cancer-associated biological
outputs.
|*Cell Adhesion
[MESH]
|*Cell Movement
[MESH]
|Adaptor Proteins, Signal Transducing/*metabolism
[MESH]