ClinVar Miner

Submissions for variant NM_000543.5(SMPD1):c.1358C>A (p.Ala453Asp)

Minimum review status: Collection method:
Minimum conflict level:
ClinVar version:
Total submissions: 1
Download table as spreadsheet
Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV003781118 SCV004570131 likely pathogenic Niemann-Pick disease, type B; Niemann-Pick disease, type A 2023-08-06 criteria provided, single submitter clinical testing This sequence change replaces alanine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 453 of the SMPD1 protein (p.Ala453Asp). This variant is not present in population databases (gnomAD no frequency). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt SMPD1 protein function. This variant is also known as A451D. This missense change has been observed in individuals with Niemann-Pick disease (PMID: 19050888, 27884455).

The information on this website is not intended for direct diagnostic use or medical decision-making without review by a genetics professional. Individuals should not change their health behavior solely on the basis of information contained on this website. Neither the University of Utah nor the National Institutes of Health independently verfies the submitted information. If you have questions about the information contained on this website, please see a health care professional.