{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T15:27:50Z","timestamp":1785511670083,"version":"3.56.0"},"reference-count":124,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2025,3,14]],"date-time":"2025-03-14T00:00:00Z","timestamp":1741910400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Deakin University Postgraduate Research (DUPR) Scholarship"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biomolecules"],"abstract":"<jats:p>Living systems require energy to maintain their existence and perform tasks such as cell division. This energy is stored in several molecular forms in nature, specifically lipids, carbohydrates, and amino acids. At a cellular level, energy is extracted from these complex molecules and transferred to adenosine triphosphate (ATP) in the cytoplasm and mitochondria. Within the mitochondria, fatty acid \u03b2-oxidation (FAO) and oxidative phosphorylation (OXPHOS) are crucial metabolic processes involved in generating ATP, with defects in these pathways causing mitochondrial disease. Very long-chain acyl-CoA dehydrogenase deficiency (VLCADD) is a fatty acid \u03b2-oxidation disorder (FAOD) affecting 1 to 2 individuals per 100,000. Similar to other mitochondrial disorders, there is no cure for VLCADD, with symptomatic treatment comprising dietary management and supplementation with medium-chain fatty acids to bypass the enzyme deficiency. While this addresses the primary defect in VLCADD, there is growing evidence that other aspects of mitochondrial function are also affected in VLCADD, including secondary defects in OXPHOS function. Here, we review our current understanding of VLCADD with a focus on the associated biochemical and molecular defects that can disrupt multiple aspects of mitochondrial function. We describe the interactions between FAO proteins and the OXPHOS complexes and how these interactions are critical for maintaining the activity of both metabolic pathways. In particular, we describe what is now known about the protein\u2013protein interactions between VLCAD and the OXPHOS supercomplex and how their disruption contributes to overall VLCADD pathogenesis.<\/jats:p>","DOI":"10.3390\/biom15030416","type":"journal-article","created":{"date-parts":[[2025,3,14]],"date-time":"2025-03-14T07:02:16Z","timestamp":1741935736000},"page":"416","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["The Pathogenesis of Very Long-Chain Acyl-CoA Dehydrogenase Deficiency"],"prefix":"10.3390","volume":"15","author":[{"given":"Shashwat","family":"Sharma","sequence":"first","affiliation":[{"name":"School of Life and Environmental Sciences, Faculty of Science, Engineering and Built Environment, Deakin University, 75 Pigdons Road, Waurn Ponds, VIC 3216, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7508-1800","authenticated-orcid":false,"given":"Matthew","family":"McKenzie","sequence":"additional","affiliation":[{"name":"School of Life and Environmental Sciences, Faculty of Science, Engineering and Built Environment, Deakin University, 75 Pigdons Road, Waurn Ponds, VIC 3216, Australia"},{"name":"Institute for Physical Activity and Nutrition, Deakin University, 75 Pigdons Road, Waurn Ponds, VIC 3216, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1062","DOI":"10.1002\/1873-3468.13995","article-title":"Mitochondrial disorders of the OXPHOS system","volume":"595","author":"Zeviani","year":"2021","journal-title":"FEBS Lett."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1080\/15216540152845911","article-title":"Respiratory chain supercomplexes","volume":"52","year":"2001","journal-title":"IUBMB Life"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"529","DOI":"10.1016\/j.molcel.2008.10.021","article-title":"Respiratory active mitochondrial supercomplexes","volume":"32","author":"Peleato","year":"2008","journal-title":"Mol. 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