5-78777216-A-C

Position:

• chr5-78777216-A-C

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_000046.5(ARSB):​c.*3181T>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0942 in 152,090 control chromosomes in the GnomAD database, including 899 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.094 (899 hom., cov: 32)
  • Failed GnomAD Quality Control
• Consequence: ARSB NM_000046.5 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.476

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]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 5-78777216-A-C is Benign according to our data. Variant chr5-78777216-A-C is described in ClinVar as [Benign]. Clinvar id is 354256.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.148 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ARSB	NM_000046.5	c.*3181T>G		3_prime_UTR_variant	8/8	ENST00000264914.10
ARSB	XM_011543390.2	c.*3181T>G		3_prime_UTR_variant	9/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ARSB	ENST00000264914.10	c.*3181T>G		3_prime_UTR_variant	8/8	1	NM_000046.5	P1

Frequencies

GnomAD3 genomes AF: 0.0942 AC: 14323 AN: 151972 Hom.: 900 Cov.: 32

Gnomad AFR AF: 0.0231

Gnomad AMI AF: 0.214

Gnomad AMR AF: 0.0762

Gnomad ASJ AF: 0.198

Gnomad EAS AF: 0.0404

Gnomad SAS AF: 0.157

Gnomad FIN AF: 0.100

Gnomad MID AF: 0.199

Gnomad NFE AF: 0.133

Gnomad OTH AF: 0.108

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

GnomAD4 genome AF: 0.0942 AC: 14325 AN: 152090 Hom.: 899 Cov.: 32 AF XY: 0.0930 AC XY: 6916 AN XY: 74330

Gnomad4 AFR AF: 0.0230

Gnomad4 AMR AF: 0.0760

Gnomad4 ASJ AF: 0.198

Gnomad4 EAS AF: 0.0405

Gnomad4 SAS AF: 0.158

Gnomad4 FIN AF: 0.100

Gnomad4 NFE AF: 0.133

Gnomad4 OTH AF: 0.110

Alfa AF: 0.0883 Hom.: 231

Bravo AF: 0.0872

Asia WGS AF: 0.0880 AC: 304 AN: 3476

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Mucopolysaccharidosis type 6 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	5.7
DANN	Benign	0.72

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

Publications

LitVar

Other links and lift over

dbSNP: rs11750774; hg19: chr5-78073039;