Genetic Variant ASAH1:p.Arg12His (chr8-18084767-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_004315.6(ASAH1):c.35G>A(p.Arg12His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,318 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R12P) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

ASAH1
NM_004315.6 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.51

Publications

0 publications found

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:55603): (ASAH1 antisense RNA 1)

ASAH1-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.083263904).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004315.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ASAH1	NM_004315.6	c.35G>A	p.Arg12His	missense	Exon 1 of 14	NP_004306.3
ASAH1	NM_001127505.3	c.35G>A	p.Arg12His	missense	Exon 1 of 14	NP_001120977.1	Q13510-3
ASAH1-AS1	NR_125429.1	n.-101C>T		upstream_gene	N/A

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ASAH1	ENST00000381733.9	TSL:1	c.35G>A	p.Arg12His	missense	Exon 1 of 14	ENSP00000371152.4	Q13510-2
ASAH1	ENST00000314146.10	TSL:1	c.35G>A	p.Arg12His	missense	Exon 1 of 14	ENSP00000326970.10	Q13510-3
ASAH1	ENST00000637244.1	TSL:1	n.35G>A		non_coding_transcript_exon	Exon 1 of 14	ENSP00000490188.1	A0A1B0GUP1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461318

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726896

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44670

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.00

AC:

AN:

39688

South Asian (SAS)

AF:

0.00

AC:

AN:

86050

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53392

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111806

Other (OTH)

AF:

0.00

AC:

AN:

60368

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.47

CADD

Benign

1.8

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.0063

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.097

LIST_S2

Uncertain

0.87

M_CAP

Benign

0.018

MetaRNN

Benign

0.083

MetaSVM

Benign

-0.97

PhyloP100

-1.5

PrimateAI

Benign

0.23

PROVEAN

Benign

-0.10

REVEL

Benign

0.086

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

0.0050

Vest4

0.30

MutPred

0.20

Loss of methylation at R12 (P = 0.0496)

MVP

0.22

MPC

0.0067

ClinPred

0.94

GERP RS

-2.1

PromoterAI

-0.0022

Neutral

(source)

gMVP

0.48

Mutation Taster

=100/0

polymorphism

(source)

Splicing

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over