22-50627070-C-G

Variant names:

• chr22-50627070-C-G
• rs542689643
• NM_000487.6:c.466-18G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000487.6(ARSA):​c.466-18G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,447,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as (no stars).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ARSA NM_000487.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.192
• Publications: 0 publications found

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

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000487.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARSA	NM_000487.6	MANE Select	c.466-18G>C		intron	N/A	NP_000478.3
	ARSA	NM_001085425.3		c.466-18G>C		intron	N/A	NP_001078894.2
	ARSA	NM_001085426.3		c.466-18G>C		intron	N/A	NP_001078895.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARSA	ENST00000216124.10	TSL:1 MANE Select	c.466-18G>C		intron	N/A	ENSP00000216124.5
	ARSA	ENST00000356098.9	TSL:1	c.466-18G>C		intron	N/A	ENSP00000348406.5
	ARSA	ENST00000551731.1	TSL:2	n.952G>C		non_coding_transcript_exon	Exon 2 of 2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000859 AC: 2 AN: 232760 AF XY: 0.00000781

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1447884 Hom.: 0 Cov.: 33 AF XY: 0.00000139 AC XY: 1 AN XY: 718030

African (AFR) AF: 0.00 AC: 0 AN: 33266

American (AMR) AF: 0.00 AC: 0 AN: 44266

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25614

East Asian (EAS) AF: 0.00 AC: 0 AN: 39380

South Asian (SAS) AF: 0.0000234 AC: 2 AN: 85500

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51062

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5716

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1103376

Other (OTH) AF: 0.00 AC: 0 AN: 59704

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.48
DANN	Benign	0.50
PhyloP100		-0.19

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs542689643; hg19: chr22-51065498;