Regulation of mitochondrial morphology and function by stearoylation of TFR1 View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2015-07-27

AUTHORS

Deniz Senyilmaz, Sam Virtue, Xiaojun Xu, Chong Yew Tan, Julian L. Griffin, Aubry K. Miller, Antonio Vidal-Puig, Aurelio A. Teleman

ABSTRACT

Mitochondria are involved in a variety of cellular functions, including ATP production, amino acid and lipid biogenesis and breakdown, signalling and apoptosis. Mitochondrial dysfunction has been linked to neurodegenerative diseases, cancer and ageing. Although transcriptional mechanisms that regulate mitochondrial abundance are known, comparatively little is known about how mitochondrial function is regulated. Here we identify the metabolite stearic acid (C18:0) and human transferrin receptor 1 (TFR1; also known as TFRC) as mitochondrial regulators. We elucidate a signalling pathway whereby C18:0 stearoylates TFR1, thereby inhibiting its activation of JNK signalling. This leads to reduced ubiquitination of mitofusin via HUWE1, thereby promoting mitochondrial fusion and function. We find that animal cells are poised to respond to both increases and decreases in C18:0 levels, with increased C18:0 dietary intake boosting mitochondrial fusion in vivo. Intriguingly, dietary C18:0 supplementation can counteract the mitochondrial dysfunction caused by genetic defects such as loss of the Parkinson's disease genes Pink or Parkin in Drosophila. This work identifies the metabolite C18:0 as a signalling molecule regulating mitochondrial function in response to diet. More... »

PAGES

124

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/nature14601

DOI

http://dx.doi.org/10.1038/nature14601

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1002351290

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/26214738


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