rs1050228
Variant summary
Our verdict is Benign. Variant got -18 ACMG points: 2P and 20B. PM5BP4_StrongBP6_Very_StrongBA1
The NM_000543.5(SMPD1):āc.107T>Cā(p.Val36Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.489 in 149,950 control chromosomes in the GnomAD database, including 21,996 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (ā ā ). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V36ALALA) has been classified as Uncertain significance.
Frequency
Consequence
NM_000543.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -18 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SMPD1 | NM_000543.5 | c.107T>C | p.Val36Ala | missense_variant | 1/6 | ENST00000342245.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SMPD1 | ENST00000342245.9 | c.107T>C | p.Val36Ala | missense_variant | 1/6 | 1 | NM_000543.5 | P3 |
Frequencies
GnomAD3 genomes ? AF: 0.489 AC: 73273AN: 149830Hom.: 21993 Cov.: 27
GnomAD3 exomes AF: 0.554 AC: 132344AN: 238972Hom.: 39147 AF XY: 0.552 AC XY: 72071AN XY: 130606
GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.520 AC: 752397AN: 1447526Hom.: 204749 Cov.: 70 AF XY: 0.523 AC XY: 376272AN XY: 719874
GnomAD4 genome ? AF: 0.489 AC: 73292AN: 149950Hom.: 21996 Cov.: 27 AF XY: 0.498 AC XY: 36458AN XY: 73276
ClinVar
Submissions by phenotype
not provided Benign:3
Benign, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Sep 05, 2016 | Variant Summary: The c.107T>C in SMPD1 gene is a missense change that involves the alteration of a non-conserved nucleotide and 4/5 in silico tools predict benign outcome. The variant was observed in the large and broad cohorts of the ExAC project at an allele frequency of 0.6 (61590/110368 chrs tested). This frequency exceeds the maximal expected allele frequency for a pathogenic variant in this gene (0.002). A reputable database/diagnostic center has classified the variant of interest as Benign. Taking together, based on the prevalence in general population, the variant was classified as Benign. - |
Benign, criteria provided, single submitter | clinical testing | GeneDx | Dec 04, 2018 | This variant is associated with the following publications: (PMID: 25811928, 26084044, 30795770) - |
Benign, no assertion criteria provided | clinical testing | Mayo Clinic Laboratories, Mayo Clinic | Oct 22, 2015 | - - |
Niemann-Pick disease, type A Benign:3
Benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. - |
Benign, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Jul 01, 2021 | - - |
Benign, no assertion criteria provided | clinical testing | Natera, Inc. | May 06, 2017 | - - |
not specified Benign:2
Benign, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Mar 28, 2016 | Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: MAF - |
Benign, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Feb 01, 2018 | - - |
SMPD1-related disorder Benign:1
Benign, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Feb 07, 2020 | This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). - |
Niemann-Pick disease, type B Benign:1
Benign, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Jul 01, 2021 | - - |
Niemann-Pick disease, type A;C0268243:Niemann-Pick disease, type B Benign:1
Benign, criteria provided, single submitter | clinical testing | Invitae | Feb 01, 2024 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at