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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 Nat+Commun
2017 ; 8
(ä): 15637
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WIPI3 and WIPI4 ?-propellers are scaffolds for LKB1-AMPK-TSC signalling circuits
in the control of autophagy
#MMPMID28561066
Bakula D
; Müller AJ
; Zuleger T
; Takacs Z
; Franz-Wachtel M
; Thost AK
; Brigger D
; Tschan MP
; Frickey T
; Robenek H
; Macek B
; Proikas-Cezanne T
Nat Commun
2017[May]; 8
(ä): 15637
PMID28561066
show ga
Autophagy is controlled by AMPK and mTOR, both of which associate with ULK1 and
control the production of phosphatidylinositol 3-phosphate (PtdIns3P), a
prerequisite for autophagosome formation. Here we report that WIPI3 and WIPI4
scaffold the signal control of autophagy upstream of PtdIns3P production and have
a role in the PtdIns3P effector function of WIPI1-WIPI2 at nascent
autophagosomes. In response to LKB1-mediated AMPK stimulation, WIPI4-ATG2 is
released from a WIPI4-ATG2/AMPK-ULK1 complex and translocates to nascent
autophagosomes, controlling their size, to which WIPI3, in complex with FIP200,
also contributes. Upstream, WIPI3 associates with AMPK-activated TSC complex at
lysosomes, regulating mTOR. Our WIPI interactome analysis reveals the scaffold
functions of WIPI proteins interconnecting autophagy signal control and
autophagosome formation. Our functional kinase screen uncovers a novel regulatory
link between LKB1-mediated AMPK stimulation that produces a direct signal via
WIPI4, and we show that the AMPK-related kinases NUAK2 and BRSK2 regulate
autophagy through WIPI4.
|*Autophagy
[MESH]
|*Signal Transduction
[MESH]
|AMP-Activated Protein Kinase Kinases
[MESH]
|AMP-Activated Protein Kinases/chemistry
[MESH]
|Adaptor Proteins, Signal Transducing/metabolism
[MESH]