Abstract:
:The genetic causes of Leigh syndrome are heterogeneous, with a poor genotype-phenotype correlation. To date, more than 50 nuclear genes cause nuclear gene-encoded Leigh syndrome. NDUFS6 encodes a 13 kiloDaltons subunit, which is part of the peripheral arm of complex I and is localized in the iron-sulfur fraction. Only a few patients were reported with proven NDUFS6 pathogenic variants and all presented with severe neonatal lactic acidemia and complex I deficiency, leading to death in the first days of life. Here, we present a patient harboring two NDUFS6 variants with a phenotype compatible with Leigh syndrome. Although most of previous reports suggested that NDUFS6 pathogenic variants invariably lead to early neonatal death, this report shows that the clinical spectrum could be larger. We found a severe decrease of NDUFS6 protein level in patient's fibroblasts associated with a complex I assembly defect in patient's muscle and fibroblasts. These data confirm the importance of NDUFS6 and the Zn-finger domain for a correct assembly of complex I.
journal_name
J Hum Genetjournal_title
Journal of human geneticsauthors
Rouzier C,Chaussenot A,Fragaki K,Serre V,Ait-El-Mkadem S,Richelme C,Paquis-Flucklinger V,Bannwarth Sdoi
10.1038/s10038-019-0594-4subject
Has Abstractpub_date
2019-07-01 00:00:00pages
637-645issue
7eissn
1434-5161issn
1435-232Xpii
10.1038/s10038-019-0594-4journal_volume
64pub_type
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