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p62/SQSTM1 is required for Parkin-induced mitochondrial clustering but not mitophagy; VDAC1 is dispensable for both
Open accessAbstract
Mitochondria sustain damage with aging, and the resulting mitochondrial dysfunction has been implicated in a number of diseases including Parkinson disease. We recently demonstrated that the E3 ubiquitin ligase Parkin, which is linked to recessive forms of parkinsonism, causes a dramatic increase in mitophagy and a change in mitochondrial distribution, following its translocation from the cytosol to mitochondria. Investigating how Parkin induces these changes may offer insight into the mechanisms that lead to the sequestration and elimination of damaged mitochondria. We report that following Parkin’s translocation from the cytosol to mitochondria, Parkin (but not a pathogenic mutant) promotes the K63-linked polyubiquitination of mitochondrial substrate(s) and recruits the ubiquitin- and LC3-binding protein, p62/SQSTM1, to mitochondria. After its recruitment, p62/SQSTM1 mediates the aggregation of dysfunctional mitochondria through polymerization via its PB1 domain, in a manner analogous to its aggregation of polyubiquitinated proteins. Surprisingly and in contrast to what has been recently reported for ubiquitin-induced pexophagy and xenophagy, p62 appears to be dispensable for mitophagy. Similarly, mitochondrial-anchored ubiquitin is sufficient to recruit p62 and promote mitochondrial clustering, but does not promote mitophagy. Although VDAC1 (but not VDAC2) is ubiquitinated following mitochondrial depolarization, we find VDAC1 cannot fully account for the mitochondrial K63-linked ubiquitin immunoreactivity observed following depolarization, as it is also observed in VDAC1/3-/- mouse embryonic fibroblasts. Additionally, we find VDAC1 and VDAC3 are dispensable for the recruitment of p62, mitochondrial clustering and mitophagy. These results demonstrate that mitochondria are aggregated by p62, following its recruitment by Parkin in a VDAC1-independent manner. They also suggest that proteins other than p62 are likely required for mitophagy downstream of Parkin substrates other than VDAC1.
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Cites
Pankiv, S., Clausen, T. H., Lamark, T., Brech, A., Bruun, J.-A., Outzen, H., Øvervatn, A., Bjørkøy, G., & Johansen, T. (2007) · Journal of Biological Chemistry · doi:10.1074/jbc.m702824200 · Cited by 4,578 · cited 2×
“6A).(12,24,25) To assess whether a similar mechanism is responsible for Parkin-induced aggregation of depolarized mitochondria, we tested the ability of wild-type and mutants of p62 to rescue the mitochondrial aggregation defect in p62 /- MEFs.”
BackgroundParkin is recruited selectively to impaired mitochondria and promotes their autophagy
Narendra, D., Tanaka, A., Suen, D.-F., & Youle, R. J. (2008) · The Journal of Cell Biology · doi:10.1083/jcb.200809125 · Cited by 4,026
Self-citationFission and selective fusion govern mitochondrial segregation and elimination by autophagy
Twig, G., Elorza, A., Molina, A. J. A., Mohamed, H., Wikstrom, J. D., Walzer, G., Stiles, L., Haigh, S. E., Katz, S., Las, G., et al. (2008) · The EMBO Journal · doi:10.1038/sj.emboj.7601963 · Cited by 3,082 · cited 1×
“Mitochondrial fission, which occurs following mitochondrial depolarization, is thought to precede and possibly promote mitophagy, during basal mitochondrial turnover.(30) To test whether mitochondrial fission or another consequence of depolarization is required in conjunction with stable expression of ubiquitin on the…”
MethodPINK1 Is Selectively Stabilized on Impaired Mitochondria to Activate Parkin
Narendra, D. P., Jin, S. M., Tanaka, A., Suen, D.-F., Gautier, C. A., Shen, J., Cookson, M. R., & Youle, R. J. (2010) · PLoS Biology · doi:10.1371/journal.pbio.1000298 · Cited by 2,944
Self-citationPINK1/Parkin-mediated mitophagy is dependent on VDAC1 and p62/SQSTM1
Geisler, S., Holmström, K. M., Skujat, D., Fiesel, F. C., Rothfuss, O. C., Kahle, P. J., & Springer, W. (2010) · Nature Cell Biology · doi:10.1038/ncb2012 · Cited by 2,835
Impairment of starvation-induced and constitutive autophagy in Atg7 -deficient mice
Komatsu, M., Waguri, S., Ueno, T., Iwata, J., Murata, S., Tanida, I., Ezaki, J., Mizushima, N., Ohsumi, Y., Uchiyama, Y., et al. (2005) · The Journal of Cell Biology · doi:10.1083/jcb.200412022 · Cited by 2,331
Inclusion body formation reduces levels of mutant huntingtin and the risk of neuronal death
Arrasate, M., Mitra, S., Schweitzer, E. S., Segal, M. R., & Finkbeiner, S. (2004) · Nature · doi:10.1038/nature02998 · Cited by 1,979
Matsuda, N., Sato, S., Shiba, K., Okatsu, K., Saisho, K., Gautier, C. A., Sou, Y.-S., Saiki, S., Kawajiri, S., Sato, F., et al. (2010) · Journal of Cell Biology · doi:10.1083/jcb.200910140 · Cited by 1,969
PINK1-dependent recruitment of Parkin to mitochondria in mitophagy
Vives-Bauza, C., Zhou, C., Huang, Y., Cui, M., de Vries, R. L. A., Kim, J., May, J., Tocilescu, M. A., Liu, W., Ko, H. S., et al. (2010) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0911187107 · Cited by 1,616
Nix is a selective autophagy receptor for mitochondrial clearance
Novak, I., Kirkin, V., McEwan, D. G., Zhang, J., Wild, P., Rozenknop, A., Rogov, V., Löhr, F., Popovic, D., Occhipinti, A., et al. (2010) · The EMBO Reports · doi:10.1038/embor.2009.256 · Cited by 1,309
Cited by
Youle, R. J., & Narendra, D. P. (2011) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm3028 · Cited by 3,273
Self-citationThe ubiquitin kinase PINK1 recruits autophagy receptors to induce mitophagy
Lazarou, M., Sliter, D. A., Kane, L. A., Sarraf, S. A., Wang, C., Burman, J. L., Sideris, D. P., Fogel, A. I., & Youle, R. J. (2015) · Nature · doi:10.1038/nature14893 · Cited by 2,774
Self-citationPhosphorylation of ULK1 (hATG1) by AMP-Activated Protein Kinase Connects Energy Sensing to Mitophagy
Egan, D. F., Shackelford, D. B., Mihaylova, M. M., Gelino, S., Kohnz, R. A., Mair, W., Vasquez, D. S., Joshi, A., Gwinn, D. M., Taylor, R., et al. (2011) · Science · doi:10.1126/science.1196371 · Cited by 2,600
The Roles of PINK1, Parkin, and Mitochondrial Fidelity in Parkinson’s Disease
Pickrell, A. M., & Youle, R. J. (2015) · Neuron · doi:10.1016/j.neuron.2014.12.007 · Cited by 2,310
Self-citationOxidative stress and autophagy: The clash between damage and metabolic needs
Filomeni, G., De Zio, D., & Cecconi, F. (2015) · Cell Death & Differentiation · doi:10.1038/cdd.2014.150 · Cited by 2,195
Metadata
- Authors
- Narendra, D., Kane, L. A., Hauser, D. N., Fearnley, I. M., & Youle, R. J.
- Venue
- Autophagy
- Publisher
- Informa UK Limited
- Published
- 2010-11-16
- Volume
- 6
- Issue
- 8
- Pages
- 1090-1106
- ISSN
- 1554-8627 (ISSN-L)
- 1554-8635
- OpenAlex
- W2025872915
- Cited by
- 790
- References
- 17
- FWCI
- 32.50
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Narendra, D., Kane, L. A., Hauser, D. N., Fearnley, I. M., & Youle, R. J. (2010). p62/SQSTM1 is required for Parkin-induced mitochondrial clustering but not mitophagy; VDAC1 is dispensable for both. Autophagy. https://doi.org/10.4161/auto.6.8.13426
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