Variant 22-50625182-CGGG-CGGGGGGG details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1_ModeratePM2PP5_Very_Strong

The NM_000487.6(ARSA):c.1489_1492dupCCCC(p.Arg498ProfsTer76) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000194 in 1,594,466 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000019 ( 0 hom. )

Consequence

ARSA
NM_000487.6 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: -0.608

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0248 CDS is truncated, and there are 0 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 22-50625182-C-CGGGG is Pathogenic according to our data. Variant chr22-50625182-C-CGGGG is described in ClinVar as [Likely_pathogenic]. Clinvar id is 188843.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.1489_1492dupCCCC	p.Arg498ProfsTer76	frameshift_variant	Exon 8 of 8	ENST00000216124.10	NP_000478.3	P15289A0A0C4DFZ2B4DVI5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARSA	ENST00000216124.10 link	c.1489_1492dupCCCC	p.Arg498ProfsTer76	frameshift_variant	Exon 8 of 8	1	NM_000487.6	ENSP00000216124.5		A0A0C4DFZ2

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.00000919

AC:

AN:

217596

Hom.:

AF XY:

0.00000835

AC XY:

AN XY:

119784

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000208

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000187

AC:

AN:

1442250

Hom.:

Cov.:

AF XY:

0.0000168

AC XY:

AN XY:

715880

show subpopulations

Gnomad4 AFR exome

AF:

0.0000301

Gnomad4 AMR exome

AF:

0.00

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:

0.0000227

Gnomad4 OTH exome

AF:

0.0000168

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152216

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74376

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000440

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Metachromatic leukodystrophy

Pathogenic:3

Sep 17, 2023

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 results in an extension of the ARSA protein. Other variant(s) that result in a similarly extended protein product (p.Arg498Profs*75) have been determined to be pathogenic (PMID: 19021637, 26462614). This suggests that these extensions are likely to be disease-causing. ClinVar contains an entry for this variant (Variation ID: 188843). This variant is also known as 2590_2591insCCCC. This frameshift has been observed in individual(s) with metachromatic leukodystrophy (PMID: 12809638). This variant is present in population databases (rs774153480, gnomAD 0.005%). This sequence change results in a frameshift in the ARSA gene (p.Arg498Profs*76). While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 12 amino acid(s) of the ARSA protein and extend the protein by 63 additional amino acid residues. -

May 12, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 10, 2021

Myriad Genetics, Inc.

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

NM_000487.5(ARSA):c.1489_1492dupCCCC(R498Pfs*76) is a read through frameshift variant classified as likely pathogenic in the context of metachromatic leukodystrophy. R498Pfs*76 has been observed in cases with relevant disease (PMID: 14517960). Functional assessments of this variant are not available in the literature. R498Pfs*76 has been observed in population frequency databases (gnomAD: NFE 0.016%). In summary, NM_000487.5(ARSA):c.1489_1492dupCCCC(R498Pfs*76) is a read through frameshift variant in a gene where loss of function is a known mechanism of disease and is predicted to disrupt protein function. Please note: this variant was assessed in the context of healthy population screening. -

not provided

Pathogenic:1

Mar 30, 2022

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Frameshift variant predicted to result in protein truncation, as the last 12 amino acids are replaced with 75 different amino acids; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 12809638) -

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