15-72343488-A-C

Variant names:

• chr15-72343488-A-C
• rs11629508
• NM_000520.6:c.*589T>G

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000520.6(HEXA):​c.*589T>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 0.746 in 153,542 control chromosomes in the GnomAD database, including 48,932 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.74 (48303 hom., cov: 31)
  • Exomes 𝑓: 0.90 (629 hom.)
• Consequence: HEXA NM_000520.6 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.103
• Publications: 9 publications found

Genes affected

HEXA (HGNC:4878): (hexosaminidase subunit alpha) This gene encodes a member of the glycosyl hydrolase 20 family of proteins. The encoded preproprotein is proteolytically processed to generate the alpha subunit of the lysosomal enzyme beta-hexosaminidase. This enzyme, together with the cofactor GM2 activator protein, catalyzes the degradation of the ganglioside GM2, and other molecules containing terminal N-acetyl hexosamines. Mutations in this gene lead to an accumulation of GM2 ganglioside in neurons, the underlying cause of neurodegenerative disorders termed the GM2 gangliosidoses, including Tay-Sachs disease (GM2-gangliosidosis type I). Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed. [provided by RefSeq, Jan 2016]

HEXA Gene-Disease associations (from GenCC):

• Tay-Sachs disease

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Myriad Women’s Health, Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae), ClinGen

ENSG00000260729 (HGNC:):

ENSG00000261460 (HGNC:58304):

ACMG classification

Our verdict: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 15-72343488-A-C is Benign according to our data. Variant chr15-72343488-A-C is described in ClinVar as Benign. ClinVar VariationId is 317033.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.935 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000520.6. 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
	HEXA	NM_000520.6	MANE Select	c.*589T>G		3_prime_UTR	Exon 14 of 14	NP_000511.2
	HEXA	NM_001318825.2		c.*589T>G		3_prime_UTR	Exon 14 of 14	NP_001305754.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HEXA	ENST00000268097.10	TSL:1 MANE Select	c.*589T>G		3_prime_UTR	Exon 14 of 14	ENSP00000268097.6
	ENSG00000260729	ENST00000379915.4	TSL:2	n.608+1958T>G		intron	N/A	ENSP00000478716.1
	ENSG00000261460	ENST00000570175.1	TSL:1	n.166-1898A>C		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.745 AC: 113225 AN: 151896 Hom.: 48319 Cov.: 31

Gnomad AFR AF: 0.294

Gnomad AMI AF: 0.865

Gnomad AMR AF: 0.844

Gnomad ASJ AF: 0.982

Gnomad EAS AF: 0.762

Gnomad SAS AF: 0.934

Gnomad FIN AF: 0.909

Gnomad MID AF: 0.924

Gnomad NFE AF: 0.941

Gnomad OTH AF: 0.788

GnomAD4 exome AF: 0.904 AC: 1382 AN: 1528 Hom.: 629 Cov.: 0 AF XY: 0.912 AC XY: 739 AN XY: 810

African (AFR) AF: 0.00 AC: 0 AN: 4

American (AMR) AF: 0.816 AC: 261 AN: 320

Ashkenazi Jewish (ASJ) AF: 1.00 AC: 2 AN: 2

East Asian (EAS) AF: 0.500 AC: 7 AN: 14

South Asian (SAS) AF: 0.903 AC: 121 AN: 134

European-Finnish (FIN) AF: 1.00 AC: 4 AN: 4

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.944 AC: 933 AN: 988

Other (OTH) AF: 0.871 AC: 54 AN: 62

GnomAD4 genome AF: 0.745 AC: 113216 AN: 152014 Hom.: 48303 Cov.: 31 AF XY: 0.750 AC XY: 55705 AN XY: 74300

African (AFR) AF: 0.294 AC: 12158 AN: 41402

American (AMR) AF: 0.844 AC: 12895 AN: 15286

Ashkenazi Jewish (ASJ) AF: 0.982 AC: 3409 AN: 3470

East Asian (EAS) AF: 0.762 AC: 3925 AN: 5154

South Asian (SAS) AF: 0.933 AC: 4493 AN: 4814

European-Finnish (FIN) AF: 0.909 AC: 9618 AN: 10582

Middle Eastern (MID) AF: 0.922 AC: 271 AN: 294

European-Non Finnish (NFE) AF: 0.941 AC: 64008 AN: 67992

Other (OTH) AF: 0.783 AC: 1650 AN: 2108

Alfa AF: 0.887 Hom.: 96469

Bravo AF: 0.719

Asia WGS AF: 0.795 AC: 2766 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Tay-Sachs disease Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

not provided Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	6.5
DANN	Benign	0.77
PhyloP100		0.10
Mutation Taster		=100/0	polymorphism (auto)

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: rs11629508; hg19: chr15-72635829;