chr22-50625263-G-C

Variant names:

• chr22-50625263-G-C
• rs199476385
• NM_000487.6:c.1412C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_000487.6(ARSA):​c.1412C>G​(p.Ala471Gly) 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 benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as not provided (no stars). Synonymous variant affecting the same amino acid position (i.e. A471A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ARSA NM_000487.6 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 0.956
• Publications: 3 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: G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.28811055).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARSA	NM_000487.6	MANE Select	c.1412C>G	p.Ala471Gly	missense	Exon 8 of 8	NP_000478.3
	ARSA	NM_001085425.3		c.1412C>G	p.Ala471Gly	missense	Exon 9 of 9	NP_001078894.2	A0A0C4DFZ2
	ARSA	NM_001085426.3		c.1412C>G	p.Ala471Gly	missense	Exon 9 of 9	NP_001078895.2	A0A0C4DFZ2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARSA	ENST00000216124.10	TSL:1 MANE Select	c.1412C>G	p.Ala471Gly	missense	Exon 8 of 8	ENSP00000216124.5	A0A0C4DFZ2
	ARSA	ENST00000356098.9	TSL:1	c.1412C>G	p.Ala471Gly	missense	Exon 9 of 9	ENSP00000348406.5	A0A0C4DFZ2
	ARSA	ENST00000395619.3	TSL:5	c.1412C>G	p.Ala471Gly	missense	Exon 9 of 9	ENSP00000378981.3	A0A0C4DFZ2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: not provided

Revision: no classification provided

Pathogenic	VUS	Benign	Condition
-	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.093
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.060
CADD	Benign	6.9
DANN	Benign	0.92
DEOGEN2	Benign	0.28	T
Eigen	Benign	-1.0
Eigen_PC	Benign	-0.96
FATHMM_MKL	Benign	0.091	N
LIST_S2	Benign	0.39	T
M_CAP	Benign	0.053	D
MetaRNN	Benign	0.29	T
MetaSVM	Benign	-0.68	T
PhyloP100		0.96
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-0.92	N
REVEL	Uncertain	0.48
Sift	Benign	0.29	T
Sift4G	Benign	0.38	T
Vest4		0.66
MVP		0.65
ClinPred		0.046	T
GERP RS		3.0
gMVP		0.41
Mutation Taster		=3/97	disease causing

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: rs199476385; hg19: chr22-51063691;