chr5-78985055-G-T

Variant names:

• chr5-78985055-G-T
• rs1233331806
• NM_000046.5:c.194C>A

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PM1 PM2 PM5 PP2 PP3_Moderate

The NM_000046.5(ARSB):​c.194C>A​(p.Ser65Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000719 in 1,389,956 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. S65F) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: ARSB NM_000046.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.49
• Publications: 0 publications found

Genes affected

ARSB (HGNC:714): (arylsulfatase B) Arylsulfatase B encoded by this gene belongs to the sulfatase family. The arylsulfatase B homodimer hydrolyzes sulfate groups of N-Acetyl-D-galactosamine, chondriotin sulfate, and dermatan sulfate. The protein is targeted to the lysozyme. Mucopolysaccharidosis type VI is an autosomal recessive lysosomal storage disorder resulting from a deficiency of arylsulfatase B. Two alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Dec 2016]

ARSB Gene-Disease associations (from GenCC):

• mucopolysaccharidosis type 6

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen, Illumina, G2P

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PM1: In a hotspot region, there are 9 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 8 uncertain in NM_000046.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr5-78985055-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 559735.
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 85 curated pathogenic missense variants (we use a threshold of 10). The gene has 14 curated benign missense variants. Gene score misZ: 0.63089 (below the threshold of 3.09). Trascript score misZ: -0.06109 (below the threshold of 3.09). GenCC associations: The gene is linked to mucopolysaccharidosis type 6.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.938

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000046.5. 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
	ARSB	NM_000046.5	MANE Select	c.194C>A	p.Ser65Tyr	missense	Exon 1 of 8	NP_000037.2
	ARSB	NM_198709.3		c.194C>A	p.Ser65Tyr	missense	Exon 2 of 8	NP_942002.1	P15848-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARSB	ENST00000264914.10	TSL:1 MANE Select	c.194C>A	p.Ser65Tyr	missense	Exon 1 of 8	ENSP00000264914.4	P15848-1
	ARSB	ENST00000396151.7	TSL:1	c.194C>A	p.Ser65Tyr	missense	Exon 2 of 8	ENSP00000379455.3	P15848-2
	ARSB	ENST00000565165.2	TSL:1	c.194C>A	p.Ser65Tyr	missense	Exon 1 of 5	ENSP00000456339.2	A0A2U3U034

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.19e-7 AC: 1 AN: 1389956 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 690972

African (AFR) AF: 0.0000347 AC: 1 AN: 28788

American (AMR) AF: 0.00 AC: 0 AN: 36328

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24222

East Asian (EAS) AF: 0.00 AC: 0 AN: 32256

South Asian (SAS) AF: 0.00 AC: 0 AN: 78494

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49694

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5208

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078096

Other (OTH) AF: 0.00 AC: 0 AN: 56870

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.56
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.90	D
Eigen	Pathogenic	0.72
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.94	D
M_CAP	Pathogenic	0.98	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.5	H
PhyloP100		7.5
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-4.7	D
REVEL	Pathogenic	0.91
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.60
MutPred		0.74		Loss of disorder (P = 0.0785)
MVP		0.99
MPC		0.99
ClinPred		1.0	D
GERP RS		3.6
PromoterAI		-0.081	Neutral
Varity_R		0.96
gMVP		0.93
Mutation Taster		=30/70	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: rs1233331806; hg19: chr5-78280878;