Send to

Choose Destination
See comment in PubMed Commons below
Hum Mol Genet. 2014 Jan 1;23(1):145-56. doi: 10.1093/hmg/ddt407. Epub 2013 Aug 19.

Hexokinase activity is required for recruitment of parkin to depolarized mitochondria.

Author information

Cell Biology and Gene Expression Section and.


Autosomal recessive parkinsonism genes contribute to maintenance of mitochondrial function. Two of these, PINK1 and parkin, act in a pathway promoting autophagic removal of depolarized mitochondria. Although recruitment of parkin to mitochondria is PINK1-dependent, additional components necessary for signaling are unclear. We performed a screen for endogenous modifiers of parkin recruitment to depolarized mitochondria and identified hexokinase 2 (HK2) as a novel modifier of depolarization-induced parkin recruitment. Hexose kinase activity was required for parkin relocalization, suggesting the effects are shared among hexokinases including the brain-expressed hexokinase 1 (HK1). Knockdown of both HK1 and HK2 led to a stronger block in parkin relocalization than either isoform alone, and expression of HK2 in primary neurons promoted YFP-parkin recruitment to depolarized mitochondria. Mitochondrial parkin recruitment was attenuated with AKT inhibition, which is known to modulate HK2 activity and mitochondrial localization. We, therefore, propose that Akt-dependent recruitment of hexokinases is a required step in the recruitment of parkin prior to mitophagy.

[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons


    Supplemental Content

    Full text links

    Icon for Silverchair Information Systems Icon for PubMed Central
    Loading ...
    Support Center