Cited by 37Trace Elements in HealthMitochondrial Function and PathologyMuscle Physiology and Disorders

The mitochondrial Cu+ transporter PiC2 (SLC25A3) is a target of MTF1 and contributes to the development of skeletal muscle in vitro

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McCann, Cat, Quinteros, Michael, Adelugba, Ifeoluwa, Morgada, Marcos N., Castelblanco, Aida R., Davis, Emily J., Lanzirotti, Antonio, Hainer, Sarah J. +3 more·2022·Frontiers in Molecular Biosciences

Published version of a preprint

Abstract

The loading of copper (Cu) into cytochrome c oxidase (COX) in mitochondria is essential for energy production in cells. Extensive studies have been performed to characterize mitochondrial cuproenzymes that contribute to the metallation of COX, such as Sco1, Sco2, and Cox17. However, limited information is available on the upstream mechanism of Cu transport and delivery to mitochondria, especially through Cu-impermeable membranes, in mammalian cells. The mitochondrial phosphate transporter SLC25A3, also known as PiC2, binds Cu + and transports the ion through these membranes in eukaryotic cells, ultimately aiding in the metallation of COX. We used the well-established differentiation model of primary myoblasts derived from mouse satellite cells, wherein Cu availability is necessary for growth and maturation, and showed that PiC2 is a target of MTF1, and its expression is both induced during myogenesis and favored by Cu supplementation. PiC2 deletion using CRISPR/Cas9 showed that the transporter is required for proliferation and differentiation of primary myoblasts, as both processes are delayed upon PiC2 knock-out. The effects of PiC2 deletion were rescued by the addition of Cu to the growth medium, implying the deleterious effects of PiC2 knockout in myoblasts may be in part due to a failure to deliver sufficient Cu to the mitochondria, which can be compensated by other mitochondrial cuproproteins. Co-localization and co-immunoprecipitation of PiC2 and COX also suggest that PiC2 may participate upstream in the copper delivery chain into COX, as verified by in vitro Cu + -transfer experiments. These data indicate an important role for PiC2 in both the delivery of Cu to the mitochondria and COX, favoring the differentiation of primary myoblasts.

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Crossref · 10.3389/fmolb.2022.1037941

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Authors
McCann, C., Quinteros, M., Adelugba, I., Morgada, M. N., Castelblanco, A. R., Davis, E. J., Lanzirotti, A., Hainer, S. J., Vila, A. J., Navea, J. G., & Padilla-Benavides, T.
Affiliations
  • Wesleyan University (US)
  • University of Massachusetts Chan Medical School (US)
  • Instituto de Biología Molecular y Celular de Rosario (AR)
  • Skidmore College (US)
  • University of Chicago (US)
  • University of Pittsburgh (US)
Venue
Frontiers in Molecular Biosciences
Published
2022-11-09
Volume
9
Pages
1037941-1037941
ISSN
2296-889X (ISSN-L)
OpenAlex
W4308722499
Cited by
37
References
107
Citations by year
2026: 10 · 2025: 11 · 2024: 11 · 2023: 4 · 2022: 1
FWCI
4.17
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Molecular Biosciences (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health (R01AR077578)
  • National Science Foundation (EAR–1634415)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
SLC25A3, MTF-1, myogenesis, satellite cells, copper supplementation

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