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Identification of SLC25A46 interaction interfaces with mitochondrial membrane fusogens Opa1 and Mfn2. | LitMetric

Identification of SLC25A46 interaction interfaces with mitochondrial membrane fusogens Opa1 and Mfn2.

J Biol Chem

Department of Molecular Biology, Massachusetts General Hospital, Boston Massachusetts, USA; Department of Genetics, Harvard Medical School, Boston Massachusetts, USA. Electronic address:

Published: October 2024

AI Article Synopsis

Article Abstract

Mitochondrial fusion requires the sequential merger of four bilayers to two. The outer-membrane solute carrier family 25 member (SLC25A46) interacts with both the outer and inner membrane dynamin family GTPases mitofusin 1/2 and optic atrophy 1 (Opa1). While SLC25A46 levels are known to affect mitochondrial morphology, how SLC25A46 interacts with mitofusin 1/2 and Opa1 to regulate membrane fusion is not understood. In this study, we use crosslinking mass spectrometry and AlphaFold 2 modeling to identify interfaces mediating an SLC25A46 interaction with Opa1 and Mfn2. We reveal that the bundle signaling element of Opa1 interacts with SLC25A46, and present evidence of an Mfn2 interaction involving the SLC25A46 cytosolic face. We validate these newly identified interaction interfaces and show that they play a role in mitochondrial network maintenance.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11459905PMC
http://dx.doi.org/10.1016/j.jbc.2024.107740DOI Listing

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