QBI Neuroscience Seminar: 'Culling Bad Mitochondria: The Molecular Mechanisms of PINK1/Parkin mitophagy'

Event Details

Date:

Wednesday, 29 May 2019 - Wednesday, 29 May 2019

Time:

11:00 am - 12:00 pm

Room:

QBI Level 7 Auditorium

UQ Location:

Queensland Brain Institute (St Lucia)

URL:

http://www.qbi.uq.edu.au/neuroscience-seminars

Event category(s):

Full Description:: Dr Michael Lazarou
Monash Biomedicine Discovery Institute
Monash University VIC

Title: “Culling Bad Mitochondria: The Molecular Mechanisms of PINK1/Parkin mitophagy”

Abstract: Mitochondrial dysfunction is a major contributor to the pathogenesis of Parkinson’s disease. PINK1 and Parkin are proteins mutated in familial Parkinson’s disease, which function to maintain mitochondrial health by culling damaged mitochondria through a selective form of autophagy termed mitophagy. Removal of damaged mitochondria maintains cellular and organismal health by maintaining mitochondrial energy supply, preventing oxidative stress, and by preventing the release of mitochondrial factors that cause cell death and inflammation. PINK1 and Parkin drive mitophagy by selectively tagging damaged mitochondria to trigger their encapsulation by a double membrane structure called an autophagosome. Autophagosomes deliver damaged mitochondria to lysosomes where they are degraded. Despite the importance of PINK1/Parkin mitophagy, little is known about how autophagosomes are built around damaged mitochondria and how autophagy-related (Atg) proteins function during mitophagy. This presentation will focus on the mechanisms behind how damaged mitochondria are identified by PINK1 and Parkin, and the downstream events that govern autophagosome formation.