rs141068211

Positions:

chr8-18062298-A-G

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PM1BP4_ModerateBP6BS2

The NM_177924.5(ASAH1):c.629T>C(p.Met210Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00132 in 1,614,240 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00093 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0014 ( 2 hom. )

Consequence

ASAH1
NM_177924.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:7B:4

Conservation

PhyloP100: 2.96

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 (HGNC:):

ASAH1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

PM1

In a chain Acid ceramidase subunit beta (size 252) in uniprot entity ASAH1_HUMAN there are 5 pathogenic changes around while only 1 benign (83%) in NM_177924.5

BP4

Computational evidence support a benign effect (MetaRNN=0.118029535).

BP6

Variant 8-18062298-A-G is Benign according to our data. Variant chr8-18062298-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 362376.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=5}.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ASAH1	NM_177924.5 linkuse as main transcript	c.629T>C	p.Met210Thr	missense_variant	8/14	ENST00000637790.2	NP_808592.2	Q13510-1Q53H01A8K0B6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ASAH1	ENST00000637790.2 linkuse as main transcript	c.629T>C	p.Met210Thr	missense_variant	8/14	1	NM_177924.5	ENSP00000490272.1		Q13510-1

Frequencies

GnomAD3 genomes

AF:

0.000933

AC:

142

AN:

152256

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000265

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00176

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.000811

AC:

204

AN:

251450

Hom.:

AF XY:

0.000876

AC XY:

119

AN XY:

135898

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.000781

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.00143

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.00136

AC:

1989

AN:

1461866

Hom.:

Cov.:

AF XY:

0.00131

AC XY:

953

AN XY:

727232

show subpopulations

Gnomad4 AFR exome

AF:

0.000329

Gnomad4 AMR exome

AF:

0.00107

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.0000936

Gnomad4 NFE exome

AF:

0.00165

Gnomad4 OTH exome

AF:

0.00149

GnomAD4 genome

AF:

0.000932

AC:

142

AN:

152374

Hom.:

Cov.:

AF XY:

0.000698

AC XY:

AN XY:

74522

show subpopulations

Gnomad4 AFR

AF:

0.000264

Gnomad4 AMR

AF:

0.000457

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.00176

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00142

Hom.:

Bravo

AF:

0.000945

TwinsUK

AF:

0.00189

AC:

ALSPAC

AF:

0.00311

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00186

AC:

ExAC

AF:

0.000667

AC:

EpiCase

AF:

0.00131

EpiControl

AF:

0.00202

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:7Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:5Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Feb 01, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jun 18, 2019	- -
Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jun 15, 2022	- -
Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jan 19, 2021	In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 29358611) -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 25, 2022	This sequence change replaces methionine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 210 of the ASAH1 protein (p.Met210Thr). This variant is present in population databases (rs141068211, gnomAD 0.1%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with clinical features of Rolandic epilepsy (PMID: 29358611). ClinVar contains an entry for this variant (Variation ID: 362376). 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 not expected to disrupt ASAH1 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Childhood epilepsy with centrotemporal spikes

Pathogenic:1

Pathogenic, no assertion criteria provided

case-control

Bioinformatics Core, Luxembourg Center for Systems Biomedicine

Jan 01, 2017

CAADphred>15 -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Dec 21, 2022

Variant summary: ASAH1 c.629T>C (p.Met210Thr) results in a non-conservative amino acid change located in the Choloylglycine hydrolase/NAAA C-terminal domain (IPR029132) of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00082 in 255942 control chromosomes (gnomAD and publication data). c.629T>C has been reported in the literature in individuals affected with lysosomal storage disorders, Parkinsons disease or Rolandic epilepsy, as well as in controls (Di Fruscio_2015, Robak_2017, Bobbili_2018). These reports do not provide unequivocal conclusions about association of the variant with Spinal Muscular Atrophy With Progressive Myoclonic Epilepsy. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five ClinVar submitters (evaluation after 2014) cite this variant as uncertain significance (n=2), likely benign (n=2) and pathogenic (n=1). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Farber lipogranulomatosis

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 30, 2021

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

ASAH1-related disorders

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 25, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Uncertain

0.070

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.77

D;D;D;.;T;T;T;T;T;T;T;.;.;.;T;T

Eigen

Benign

0.0042

Eigen_PC

Benign

0.15

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.79

.;T;T;T;T;.;T;T;T;T;T;T;T;T;T;T

M_CAP

Benign

0.031

MetaRNN

Benign

0.12

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

-0.23

MutationAssessor

Benign

1.4

L;L;.;.;.;.;.;.;.;.;.;.;.;.;.;.

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-2.8

.;D;D;D;.;.;.;.;.;.;.;.;.;D;.;.

REVEL

Uncertain

0.58

Sift

Benign

0.086

.;T;T;T;.;.;.;.;.;.;.;.;.;T;.;.

Sift4G

Benign

0.11

.;T;T;T;.;.;.;.;.;.;.;.;.;T;.;.

Polyphen

0.011

B;B;B;B;.;.;.;.;.;.;.;.;.;.;.;.

Vest4

0.60, 0.60, 0.60, 0.61

MVP

0.87

MPC

0.0029

ClinPred

0.031

GERP RS

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.58

gMVP

0.93

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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