X-2958381-T-G

Variant names:

• chrX-2958381-T-G
• rs35718384
• NM_000047.3:c.78A>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_000047.3(ARSL):​c.78A>C​(p.Ala26Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,098,200 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A26A) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 1 hem.)
• Consequence: ARSL NM_000047.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.10
• Publications: 0 publications found

Genes affected

ARSL (HGNC:719): (arylsulfatase L) Arylsulfatase E is a member of the sulfatase family. It is glycosylated postranslationally and localized to the golgi apparatus. Sulfatases are essential for the correct composition of bone and cartilage matrix. X-linked chondrodysplasia punctata, a disease characterized by abnormalities in cartilage and bone development, has been linked to mutations in this gene. Alternative splicing results in multiple transcript variants. A pseudogene related to this gene is located on the Y chromosome. [provided by RefSeq, Sep 2013]

ARSL Gene-Disease associations (from GenCC):

• X-linked chondrodysplasia punctata 1

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BP7: Synonymous conserved (PhyloP=-1.1 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARSL	NM_000047.3	c.78A>C	p.Ala26Ala	synonymous_variant	Exon 3 of 11	ENST00000381134.9	NP_000038.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARSL	ENST00000381134.9	c.78A>C	p.Ala26Ala	synonymous_variant	Exon 3 of 11	1	NM_000047.3	ENSP00000370526.3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1098200 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 1 AN XY: 363554

African (AFR) AF: 0.00 AC: 0 AN: 26398

American (AMR) AF: 0.00 AC: 0 AN: 35196

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19382

East Asian (EAS) AF: 0.00 AC: 0 AN: 30203

South Asian (SAS) AF: 0.00 AC: 0 AN: 54136

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40527

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4135

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 842132

Other (OTH) AF: 0.00 AC: 0 AN: 46091

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	2.5
DANN	Benign	0.29
PhyloP100		-1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs35718384; hg19: chrX-2876422;