Cited by 153Mitochondrial Function and PathologyAutophagy in Disease and TherapyIon Channels and Receptors

Mitochondrial matrix Ca 2 + as an intrinsic signal regulating mitochondrial motility in axons

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Chang, Karen T., Niescier, Robert F., Min, Kyung-Tai·2011·Proceedings of the National Academy of Sciences

Abstract

The proper distribution of mitochondria is particularly vital for neurons because of their polarized structure and high energy demand. Mitochondria in axons constantly move in response to physiological needs, but signals that regulate mitochondrial movement are not well understood. Aside from producing ATP, Ca 2+ buffering is another main function of mitochondria. Activities of many enzymes in mitochondria are also Ca 2+ -dependent, suggesting that intramitochondrial Ca 2+ concentration is important for mitochondrial functions. Here, we report that mitochondrial motility in axons is actively regulated by mitochondrial matrix Ca 2+ . Ca 2+ entry through the mitochondrial Ca 2+ uniporter modulates mitochondrial transport, and mitochondrial Ca 2+ content correlates inversely with the speed of mitochondrial movement. Furthermore, the miro1 protein plays a role in Ca 2+ uptake into the mitochondria, which subsequently affects mitochondrial movement.

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Authors
Chang, K. T., Niescier, R. F., & Min, K.-T.
Affiliations
  • University of Southern California (US)
  • Indiana University Bloomington (US)
Venue
Proceedings of the National Academy of Sciences
Published
2011-08-29
Volume
108
Issue
37
Pages
15456-15461
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1998654006
Cited by
153
References
33
Citations by year
2026: 9 · 2025: 15 · 2024: 13 · 2023: 11 · 2022: 13 · 2021: 14 · 2020: 10 · 2019: 12 · 2018: 8 · 2017: 7 · 2016: 10 · 2015: 5 · 2014: 12 · 2013: 6 · 2012: 8
FWCI
3.37
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Scholarworks@UNIST (Ulsan National Institute of Science and Technology) (submittedVersion)
Funders
National Institute of Neurological Disorders and Stroke (K99NS052524, NS052524, R00NS052524)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
Keywords
mitochondrial motility, axons, mitochondrial matrix calcium, mitochondrial calcium uniporter, calcium uptake, Miro1, mitochondrial transport, calcium buffering, neuronal energy metabolism, calcium-dependent enzyme activity
MeSH terms
Animals, Axons, Calcium, Humans, Mitochondria, Movement, Mutation, Calcium Channels, Calcium Signaling, EF Hand Motifs, Mitochondrial Proteins, Mice

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