Variant chr8-18084687-CAGCAAAG-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 10P and 1B. PVS1PM2BS1_Supporting

The NM_004315.6(ASAH1):c.108_114delCTTTGCT(p.Ser36fs) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00027 in 1,613,676 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.0014 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00015 ( 0 hom. )

Consequence

ASAH1
NM_004315.6 frameshift

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 0.545

Variant links:

Genes affected

ASAH1 (HGNC:735): (N-acylsphingosine amidohydrolase 1) This gene encodes a member of the acid ceramidase family of proteins. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed. Processing of this preproprotein generates alpha and beta subunits that heterodimerize to form the mature lysosomal enzyme, which catalyzes the degradation of ceramide into sphingosine and free fatty acid. This enzyme is overexpressed in multiple human cancers and may play a role in cancer progression. Mutations in this gene are associated with the lysosomal storage disorder, Farber lipogranulomatosis, and a neuromuscular disorder, spinal muscular atrophy with progressive myoclonic epilepsy. [provided by RefSeq, Oct 2015]

ASAH1 links:

ASAH1-AS1 (HGNC:):

ASAH1-AS1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00141 (215/152332) while in subpopulation AFR AF= 0.00491 (204/41580). AF 95% confidence interval is 0.00435. There are 1 homozygotes in gnomad4. There are 108 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ASAH1	NM_004315.6 linkuse as main transcript	c.108_114delCTTTGCT	p.Ser36fs	frameshift_variant	1/14		NP_004306.3	Q13510-2Q53H01A8K0B6
ASAH1	NM_001127505.3 linkuse as main transcript	c.108_114delCTTTGCT	p.Ser36fs	frameshift_variant	1/14		NP_001120977.1	Q13510-3Q53H01A8K0B6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	Protein	UniProt
ASAH1	ENST00000381733.9 linkuse as main transcript	c.108_114delCTTTGCT	p.Ser36fs	frameshift_variant	1/14	1	ENSP00000371152.4	Q13510-2
ASAH1	ENST00000314146.10 linkuse as main transcript	c.108_114delCTTTGCT	p.Ser36fs	frameshift_variant	1/14	1	ENSP00000326970.10	Q13510-3
ASAH1	ENST00000637244.1 linkuse as main transcript	n.108_114delCTTTGCT		non_coding_transcript_exon_variant	1/14	1	ENSP00000490188.1	A0A1B0GUP1

Frequencies

GnomAD3 genomes

AF:

0.00141

AC:

214

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00490

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000341

AC:

AN:

249026

Hom.:

AF XY:

0.000297

AC XY:

AN XY:

134704

show subpopulations

Gnomad AFR exome

AF:

0.00428

Gnomad AMR exome

AF:

0.000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000447

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000151

AC:

220

AN:

1461344

Hom.:

AF XY:

0.000127

AC XY:

AN XY:

726888

show subpopulations

Gnomad4 AFR exome

AF:

0.00487

Gnomad4 AMR exome

AF:

0.000403

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000162

Gnomad4 OTH exome

AF:

0.000315

GnomAD4 genome

AF:

0.00141

AC:

215

AN:

152332

Hom.:

Cov.:

AF XY:

0.00145

AC XY:

108

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.00491

Gnomad4 AMR

AF:

0.000392

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000738

Hom.:

Bravo

AF:

0.00165

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

May 01, 2022

- -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

Athena Diagnostics

Oct 24, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over