rs74315462

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Pathogenic. The variant received 19 ACMG points: 19P and 0B. PM1PM2PM5PP2PP3_StrongPP5_Very_Strong

The NM_000487.6(ARSA):c.413C>T(p.Pro138Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,459,778 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P138R) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

ARSA
NM_000487.6 missense

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:3U:1

Conservation

PhyloP100: 6.71

Publications

5 publications found

Variant links:

Genes affected

ARSA (HGNC:713): (arylsulfatase A) The protein encoded by this gene hydrolyzes cerebroside sulfate to cerebroside and sulfate. Defects in this gene lead to metachromatic leucodystrophy (MLD), a progressive demyelination disease which results in a variety of neurological symptoms and ultimately death. Alternatively spliced transcript variants have been described for this gene. [provided by RefSeq, Dec 2010]

ARSA Gene-Disease associations (from GenCC):

metachromatic leukodystrophy
Inheritance: AR Classification: DEFINITIVE Submitted by: Myriad Women’s Health, ClinGen
metachromatic leukodystrophy, juvenile form
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp

ARSA links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 19 ACMG points.

PM1

In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 10 uncertain in NM_000487.6

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr22-50627218-G-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 986957.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 159 curated pathogenic missense variants (we use a threshold of 10). The gene has 11 curated benign missense variants. Gene score misZ: 0.38013 (below the threshold of 3.09). Trascript score misZ: -0.56919 (below the threshold of 3.09). GenCC associations: The gene is linked to metachromatic leukodystrophy, juvenile form, metachromatic leukodystrophy.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.989

PP5

Variant 22-50627218-G-A is Pathogenic according to our data. Variant chr22-50627218-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 3064.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARSA	NM_000487.6 link	c.413C>T	p.Pro138Leu	missense_variant	Exon 2 of 8	ENST00000216124.10	NP_000478.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARSA	ENST00000216124.10 link	c.413C>T	p.Pro138Leu	missense_variant	Exon 2 of 8	1	NM_000487.6	ENSP00000216124.5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000419

AC:

AN:

238454

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000562

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459778

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726108

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44532

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26070

East Asian (EAS)

AF:

0.00

AC:

AN:

39656

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86112

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52528

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111362

Other (OTH)

AF:

0.00

AC:

AN:

60294

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Metachromatic leukodystrophy

Pathogenic:2Uncertain:1

Neuberg Centre For Genomic Medicine, NCGM

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The missense variant p.P138L in ARSA (NM_000487.6) causes a change at the same amino acid residue as a previously established pathogenic variant. This variant has been observed to be homozygous in an individual affected with metachromatic leukodystrophy (Kafert S et al, 1995). This variant has been reported to affect ARSA protein function (Kafert S et al, 1995). The p.P138L variant is observed in 1/17,802 (0.0056%) alleles from individuals of East Asian background in gnomAD Exomes and is novel (not in any individuals) in 1000 Genomes. For these reasons, this variant has been classified as Pathogenic. -

Aug 30, 2017

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Nov 01, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Pro138 amino acid residue in ARSA. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 22854541). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Experimental studies have shown that this missense change affects ARSA function (PMID: 7860068). 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 ARSA protein function. ClinVar contains an entry for this variant (Variation ID: 3064). This variant is also known as P136L. This missense change has been observed in individual(s) with metachromatic leukodystrophy (PMID: 7860068). This variant is present in population databases (rs74315462, gnomAD 0.006%). This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 138 of the ARSA protein (p.Pro138Leu). -

METACHROMATIC LEUKODYSTROPHY, SEVERE

Pathogenic:1

Nov 07, 2018

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.80

BayesDel_addAF

Pathogenic

0.41

BayesDel_noAF

Pathogenic

0.52

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.50

T;T;T;.;T

Eigen

Pathogenic

0.92

Eigen_PC

Pathogenic

0.83

FATHMM_MKL

Uncertain

0.94

LIST_S2

Pathogenic

0.99

.;.;.;D;D

M_CAP

Pathogenic

0.41

MetaRNN

Pathogenic

0.99

D;D;D;D;D

MetaSVM

Pathogenic

1.1

PhyloP100

6.7

PrimateAI

Uncertain

0.71

PROVEAN

Pathogenic

-8.3

D;D;D;D;D

REVEL

Pathogenic

0.96

Sift

Pathogenic

0.0

D;D;D;D;D

Sift4G

Uncertain

0.0020

D;D;D;D;D

Vest4

0.94

MVP

0.99

ClinPred

0.95

GERP RS

4.7

gMVP

0.97

Mutation Taster

=0/100

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

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

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over