SDHAF1, encoding a LYR complex-II specific assembly factor, is mutated in SDH-defective infantile leukoencephalopathy
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Updated: Jun 22, 2026

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
Published on: August 20, 2019
Daniele Ghezzi1, Paola Goffrini, Graziella Uziel
1Unit of Molecular Neurogenetics-Pierfranco and Luisa Mariani Center for Study of Children's Mitochondrial Disorders, Foundation IRCCS Neurological Institute C. Besta, Milan, Italy.
Abstract:
We report mutations in SDHAF1, encoding a new LYR-motif protein, in infantile leukoencephalopathy with defective succinate dehydrogenase (SDH, complex II). Disruption of the yeast homolog or expression of variants corresponding to human mutants caused SDH deficiency and failure of OXPHOS-dependent growth, whereas SDH activity and amount were restored in mutant fibroblasts proportionally with re-expression of the wild-type gene. SDHAF1 is the first bona fide SDH assembly factor reported in any organism.
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