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The modified mitochondrial outer membrane carrier MTCH2 links mitochondrial fusion to lipogenesis. | LitMetric

The modified mitochondrial outer membrane carrier MTCH2 links mitochondrial fusion to lipogenesis.

J Cell Biol

The Department of Molecular and Cellular Biology, College of Biological Sciences, University of California, Davis, Davis, CA.

Published: November 2021

AI Article Synopsis

Article Abstract

Mitochondrial function is integrated with cellular status through the regulation of opposing mitochondrial fusion and division events. Here we uncover a link between mitochondrial dynamics and lipid metabolism by examining the cellular role of mitochondrial carrier homologue 2 (MTCH2). MTCH2 is a modified outer mitochondrial membrane carrier protein implicated in intrinsic cell death and in the in vivo regulation of fatty acid metabolism. Our data indicate that MTCH2 is a selective effector of starvation-induced mitochondrial hyperfusion, a cytoprotective response to nutrient deprivation. We find that MTCH2 stimulates mitochondrial fusion in a manner dependent on the bioactive lipogenesis intermediate lysophosphatidic acid. We propose that MTCH2 monitors flux through the lipogenesis pathway and transmits this information to the mitochondrial fusion machinery to promote mitochondrial elongation, enhanced energy production, and cellular survival under homeostatic and starvation conditions. These findings will help resolve the roles of MTCH2 and mitochondria in tissue-specific lipid metabolism in animals.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8496048PMC
http://dx.doi.org/10.1083/jcb.202103122DOI Listing

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