ArticleGenetics in medicine : official journal of the American College of Medical Genetics2024
CIAO1 and MMS19 deficiency: A lethal neurodegenerative phenotype caused by cytosolic Fe-S cluster protein assembly disorders.
Article in Genetics in medicine : official journal of the American College of Medical Genetics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed, 11 citations in OpenAlex.
- Iron-sulfur cofactors in nucleic acid metabolism and protein synthesis: Assembly, delivery, and putative roles in cellular and viral systems.The Journal of biological chemistry · 2026Review
- Regulatory networks of iron sulfur cluster biology in cancer mechanisms and therapeutic perspectives.iScience · 2026Review
- Nar1 binds the cytosolic iron sulfur cluster assembly targeting complex via a bipartite interaction interface.bioRxiv : the preprint server for biology · 2026Article
- Client recruitment mechanism of the cytosolic Fe-S cluster assembly targeting complex.The EMBO journal · 2026Article
- Functional studies of human variants in C. elegans link iron metabolism to DPD deficiency and 5-FU sensitivity.Genetics · 2026Article
- D-cysteine impairs tumour growth by inhibiting cysteine desulfurase NFS1.Nature metabolism · 2025Article
- Contemporary uses of "lethal" or "life limiting" terminology in perinatal research.Current opinion in obstetrics & gynecology · 2025Review
- The critical role of the iron-sulfur cluster and CTC components in DOG-1/BRIP1 function in Caenorhabditis elegans.Nucleic acids research · 2024Article
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Authors and funding
43 authors at 19 institutions in 8 countries.
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Abstract
purposeThe functionality of many cellular proteins depends on cofactors; yet, they have only been implicated in a minority of Mendelian diseases. Here, we describe the first 2 inherited disorders of the cytosolic iron-sulfur protein assembly system.
methodsGenetic testing via genome sequencing was applied to identify the underlying disease cause in 3 patients with microcephaly, congenital brain malformations, progressive developmental and neurologic impairments, recurrent infections, and a fatal outcome. Studies in patient-derived skin fibroblasts and zebrafish models were performed to investigate the biochemical and cellular consequences.
resultsMetabolic analysis showed elevated uracil and thymine levels in body fluids but no pathogenic variants in DPYD, encoding dihydropyrimidine dehydrogenase. Genome sequencing identified compound heterozygosity in 2 patients for missense variants in CIAO1, encoding cytosolic iron-sulfur assembly component 1, and homozygosity for an in-frame 3-nucleotide deletion in MMS19, encoding the MMS19 homolog, cytosolic iron-sulfur assembly component, in the third patient. Profound alterations in the proteome, metabolome, and lipidome were observed in patient-derived fibroblasts. We confirmed the detrimental effect of deficiencies in CIAO1 and MMS19 in zebrafish models.
conclusionA general failure of cytosolic and nuclear iron-sulfur protein maturation caused pleiotropic effects. The critical function of the cytosolic iron-sulfur protein assembly machinery for antiviral host defense may well explain the recurrent severe infections occurring in our patients.
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