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Min, Kyung-Tai
Molecular & Cellular Neurobiology Lab(Min Lab)
Research Interests
  • Local protein synthesis, learning & memory, behavior, mitochondrial dynamics

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Mitochondrial matrix Ca2+ as an intrinsic signal regulating mitochondrial motility in axons

Cited 21 times inthomson ciCited 18 times inthomson ci
Title
Mitochondrial matrix Ca2+ as an intrinsic signal regulating mitochondrial motility in axons
Author
Chang, Karen T.Niescier, Robert F.Min, Kyung-Tai
Keywords
FLUORESCENT PROTEIN; CALCIUM UNIPORTER; GROWTH-FACTOR; TRANSPORT; HOMEOSTASIS; INHIBITOR; MECHANISM; MOVEMENT; SB202190; NEURONS
Issue Date
201109
Publisher
NATL ACAD SCIENCES
Citation
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.108, no.37, pp.15456 - 15461
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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DOI
http://dx.doi.org/10.1073/pnas.1106862108
ISSN
0027-8424
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