chr22-50625675-G-C

Variant names:

• chr22-50625675-G-C
• rs74315476
• NM_000487.6:c.1114C>G

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP2 PP3_Strong

The NM_000487.6(ARSA):​c.1114C>G​(p.Arg372Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R372Q) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 34)
• Consequence: ARSA NM_000487.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.57
• 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: Pathogenic. The variant received 11 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 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 chr22-50625674-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 3082.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, 0.977

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.1114C>G	p.Arg372Gly	missense	Exon 7 of 8	NP_000478.3
	ARSA	NM_001085425.3		c.1114C>G	p.Arg372Gly	missense	Exon 8 of 9	NP_001078894.2
	ARSA	NM_001085426.3		c.1114C>G	p.Arg372Gly	missense	Exon 8 of 9	NP_001078895.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARSA	ENST00000216124.10	TSL:1 MANE Select	c.1114C>G	p.Arg372Gly	missense	Exon 7 of 8	ENSP00000216124.5
	ARSA	ENST00000356098.9	TSL:1	c.1114C>G	p.Arg372Gly	missense	Exon 8 of 9	ENSP00000348406.5
	ARSA	ENST00000395619.3	TSL:5	c.1114C>G	p.Arg372Gly	missense	Exon 8 of 9	ENSP00000378981.3

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 42

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Pathogenic	0.54	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Benign	0.42	T
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.82	T
M_CAP	Pathogenic	0.67	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.92	D
PhyloP100		3.6
PrimateAI	Benign	0.46	T
PROVEAN	Pathogenic	-6.5	D
REVEL	Pathogenic	0.85
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0040	D
Vest4		0.88
MVP		0.95
ClinPred		1.0	D
GERP RS		3.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
gMVP		0.91
Mutation Taster		=8/92	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs74315476; hg19: chr22-51064103;