rs786204673
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000487.6(ARSA):c.304del(p.Leu102CysfsTer6) variant causes a frameshift change. The variant allele was found at a frequency of 0.0000132 in 1,437,858 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. L102L) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_000487.6 frameshift
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 18 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
ARSA | NM_000487.6 | c.304del | p.Leu102CysfsTer6 | frameshift_variant | 2/8 | ENST00000216124.10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
ARSA | ENST00000216124.10 | c.304del | p.Leu102CysfsTer6 | frameshift_variant | 2/8 | 1 | NM_000487.6 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD4 exome AF: 0.0000132 AC: 19AN: 1437858Hom.: 0 Cov.: 33 AF XY: 0.0000126 AC XY: 9AN XY: 713604
GnomAD4 genome ? Cov.: 33
ClinVar
Submissions by phenotype
Metachromatic leukodystrophy Pathogenic:3
Pathogenic, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Dec 26, 2017 | Variant summary: The ARSA c.304delC (p.Leu102CysfsX6) variant results in a premature termination codon, predicted to cause a truncated or absent ARSA protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Truncations downstream of this position have been classified as pathogenic by our laboratory (e.g. c.960G>A/Trp320X). One in silico tool predicts a damaging outcome for this variant. This variant is absent in 190968 control chromosomes. It has been reported in at least one late-infantile metachromatic leukodystrophy patient as a compound heterozygote, and this patient had a residual arylsulfatase A (ARSA) activity <10% of WT level (Kreysing_1993). In addition, one other clinical diagnostic laboratory classified this variant as likely pathogenic. Taken together, this variant is classified as pathogenic. - |
Likely pathogenic, criteria provided, single submitter | literature only | Counsyl | Nov 26, 2014 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Dec 19, 2023 | This sequence change creates a premature translational stop signal (p.Leu102Cysfs*6) in the ARSA gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ARSA are known to be pathogenic (PMID: 8962139, 10477432). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with metachromatic leukodystrophy (PMID: 8101038). ClinVar contains an entry for this variant (Variation ID: 189073). For these reasons, this variant has been classified as Pathogenic. - |
Metachromatic leukodystrophy, late infantile form Pathogenic:1
Pathogenic, no assertion criteria provided | literature only | OMIM | Aug 01, 1993 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at