Cited by 244Mitochondrial Function and PathologyCell death mechanisms and regulationAutophagy in Disease and Therapy

Extracellular Regulated Kinase Phosphorylates Mitofusin 1 to Control Mitochondrial Morphology and Apoptosis

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Pyakurel, Aswin, Savoia, Claudia, Hess, Daniel, Scorrano, Luca·2015·Molecular Cell

Abstract

Controlled changes in mitochondrial morphology participate in cellular signaling cascades. However, the molecular mechanisms modifying mitochondrial shape are largely unknown. Here we show that the mitogen-activated protein (MAP) kinase cascade member extracellular-signal-regulated kinase (ERK) phosphorylates the pro-fusion protein mitofusin (MFN) 1, modulating its participation in apoptosis and mitochondrial fusion. Phosphoproteomic and biochemical analyses revealed that MFN1 is phosphorylated at an atypical ERK site in its heptad repeat (HR) 1 domain. This site proved essential to mediate MFN1-dependent mitochondrial elongation and apoptosis regulation by the MEK/ERK cascade. A mutant mimicking constitutive MFN1 phosphorylation was less efficient in oligomerizing and mitochondria tethering but bound more avidly to the proapoptotic BCL-2 family member BAK, facilitating its activation and cell death. Moreover, neuronal apoptosis following oxygen glucose deprivation and MEK/ERK activation required an intact MFN1(T562). Our data identify MFN1 as an ERK target to modulate mitochondrial shape and apoptosis.

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Crossref · 10.1016/j.molcel.2015.02.021

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Authors
Pyakurel, A., Savoia, C., Hess, D., & Scorrano, L.
Affiliations
  • University of Padua (IT)
  • Friedrich Miescher Institute (CH)
Corresponding author
Scorrano, Luca
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2015-04
Volume
58
Issue
2
Pages
244-254
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2041542870
Cited by
244
References
53
Citations by year
2026: 16 · 2025: 25 · 2024: 24 · 2023: 21 · 2022: 15 · 2021: 27 · 2020: 27 · 2019: 21 · 2018: 22 · 2017: 25 · 2016: 17 · 2015: 4
FWCI
9.83
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion, cc-by)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
mitofusin 1, ERK1/2 phosphorylation, mitochondrial morphology, mitochondrial fusion, apoptosis, MEK/ERK signaling, Bak, mitochondrial elongation, neuronal apoptosis, oxygen-glucose deprivation, phosphoproteomics
MeSH terms
Animals, Cells, Cultured, Fibroblasts, Membrane Proteins, Mitochondria, Neurons, Phosphorylation, Rats, Wistar, Apoptosis, Oxidative Stress, GTP Phosphohydrolases, MAP Kinase Signaling System, Mitochondrial Proteins, Proteomics, Mice, Rats, Mitochondrial Dynamics

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