ClinVar Miner

Submissions for variant NM_177924.5(ASAH1):c.290T>A (p.Val97Glu)

dbSNP: rs1588989964
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Medical Affairs, Dicerna Pharmaceuticals RCV001003301 SCV001161384 pathogenic Farber lipogranulomatosis 2019-06-19 criteria provided, single submitter literature only Clinical significance of pathogenic was assigned to variant c.290T>A. Variant c.290T>A was identified in the ASAH1 gene in a female patient diagnosed with characteristic Type 2 Farber disease symptoms including subcutaneous granulomas, joint contractures and hoarse voice (Gene Reviews; https://www.ncbi.nlm.nih.gov/books/NBK488189/). A nodule biopsy was conducted and the diagnosis of Farber disease was made using a fibroblast sulphatide loading experiment (Kudoh et al., 1982, DOI: 10.1172/JCI110607) Through cDNA and genomic sequencing, compound heterozygous variants were identified, c.290T>A and c.703G>C. Variant 290T>A is a novel variant. Acid cermidase activity was analyzed using COS1 cells transfected with mutant cDNA. Expression of mutated acid ceramidase protein, V97E, showed acid ceramidase activity decreased to 35% of controls demonstrating the negative effect of this variant.

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