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| Likely inborn error of metabolism - targeted testing not possible v4.114 | VPS16 |
Sarah Leigh gene: VPS16 was added gene: VPS16 was added to Likely inborn error of metabolism - targeted testing not possible. Sources: Other Q4_23_promote_green tags were added to gene: VPS16. Mode of inheritance for gene: VPS16 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: VPS16 were set to 33938619; 34013567 Phenotypes for gene: VPS16 were set to Mucopolysaccharidosis-like syndrome (biallelic); Dystonia Associated with Lysosomal Abnormalities (monoallelic); Dystonia 30, OMIM:619291 Review for gene: VPS16 was set to GREEN Added comment: Copied from Lysosomal storage disorder panel: Four individuals from three families were identified (PMIDs: 33938619; 34013567) exhibiting a mucopolysaccharidosis (MPS)-like lysosomal storage phenotype with short stature, coarse facies, DD or regression, peripheral neuropathy, skeletal dysplasia, neutropenia, and high-normal glycosaminoglycan excretion. All harboured homozygous variants in VPS16 which segregated with disease, including a missense variant in a sib pair (c.540G>T; p.Trp180Cys) and a recurrent intronic variant (c.2272‐18C>A) in two supposedly unrelated patients (although both of Middle Eastern descent). Fibroblasts of the two patients with the intronic variant showed accumulation of lysosomal compartments and autophagosomes with significantly decreased VPS16 mRNA and protein levels, as well as HOPS/CORVET complexes. Cellular phenotypes were rescued upon re-expression of wild-type VPS16. ----- Heterozygous variants, as well as a homozygous missense variant (c.156C>A) found in a consanguineous Chinese family (PMID:27174565), have been found to cause dystonia with variable onset (OMIM:619291). It has been suggested that the discrepancies in patient phenotypes are due to different mechanisms of pathogenicity, where variants causing dystonia do not affect the levels of endolysosomal tethering (HOPS/CORVET) complexes. More research is needed to clarify the mechanisms underlying VPS16-related dystonia as only limited functional data is currently available - Steel et al. 2020 (PMID:32808683) did perform electron microscopic studies of lymphocytes and fibroblasts derived from 2 unrelated patients, which showed vacuolar abnormalities suggestive of impaired lysosomal function. Sources: Literature Arina Puzriakova (Genomics England Curator), 14 Jun 2021 Sources: Other |
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| Likely inborn error of metabolism - targeted testing not possible v2.328 | ARSK |
Arina Puzriakova gene: ARSK was added gene: ARSK was added to Inborn errors of metabolism. Sources: Literature Mode of inheritance for gene: ARSK was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ARSK were set to 34916232 Phenotypes for gene: ARSK were set to Mucopolysaccharidoses with short stature, coarse facial features and dysostosis multiplex Review for gene: ARSK was set to AMBER Added comment: Verheyen et al. 2022 (PMID: 34916232) reported four affected individuals of two unrelated consanguineous families with homozygous variants c.250C>T, p.(Arg84Cys) and c.560T>A, p.(Leu187Ter) in ARSK, respectively. Patients were affected with skeletal dysplasia, resembling spondyloepiphysial dysplasia. Reverse phenotyping in two individuals from one family revealed additional cardiac and ophthalmological abnormalities. Sources: Literature |
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| Likely inborn error of metabolism - targeted testing not possible v1.262 | ARSE | Louise Daugherty Tag new-gene-name tag was added to gene: ARSE. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Likely inborn error of metabolism - targeted testing not possible v1.262 | ARSE | Louise Daugherty commented on gene: ARSE | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Likely inborn error of metabolism - targeted testing not possible v0.4 | ARSE |
Ellen McDonagh gene: ARSE was added gene: ARSE was added to Inborn errors of metabolism. Sources: Expert Review Green Mode of inheritance for gene: ARSE was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Phenotypes for gene: ARSE were set to Chondrodysplasia punctata, X-linked recessive 302950 |
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