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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+Cell+Biol
2016 ; 215
(5
): 649-665
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Mitochondrial division occurs concurrently with autophagosome formation but
independently of Drp1 during mitophagy
#MMPMID27903607
Yamashita SI
; Jin X
; Furukawa K
; Hamasaki M
; Nezu A
; Otera H
; Saigusa T
; Yoshimori T
; Sakai Y
; Mihara K
; Kanki T
J Cell Biol
2016[Dec]; 215
(5
): 649-665
PMID27903607
show ga
Mitophagy is thought to play an important role in mitochondrial quality control.
Mitochondrial division is believed to occur first, and autophagosome formation
subsequently occurs to enwrap mitochondria as a process of mitophagy. However,
there has not been any temporal analysis of mitochondrial division and
autophagosome formation in mitophagy. Therefore, the relationships among these
processes remain unclear. We show that the mitochondrial division factor Dnm1 in
yeast or Drp1 in mammalian cells is dispensable for mitophagy. Autophagosome
formation factors, such as FIP200, ATG14, and WIPIs, were essential for the
mitochondrial division for mitophagy. Live-cell imaging showed that isolation
membranes formed on the mitochondria. A small portion of the mitochondria then
divided from parental mitochondria simultaneously with the extension of isolation
membranes and autophagosome formation. These findings suggest the presence of a
mitophagy process in which mitochondrial division for mitophagy is accomplished
together with autophagosome formation.