Variant 7-107672252-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_000441.2(SLC26A4):c.415+4A>G variant causes a splice donor region, intron change. The variant allele was found at a frequency of 0.00000589 in 1,527,534 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000015 ( 0 hom. )

Consequence

SLC26A4
NM_000441.2 splice_donor_region, intron

Scores

Splicing: ADA: 0.9996

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 4.45

Variant links:

Genes affected

SLC26A4 (HGNC:8818): (solute carrier family 26 member 4) Mutations in this gene are associated with Pendred syndrome, the most common form of syndromic deafness, an autosomal-recessive disease. It is highly homologous to the SLC26A3 gene; they have similar genomic structures and this gene is located 3' of the SLC26A3 gene. The encoded protein has homology to sulfate transporters. [provided by RefSeq, Jul 2008]

SLC26A4 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC26A4	NM_000441.2 linkuse as main transcript	c.415+4A>G		splice_donor_region_variant, intron_variant		ENST00000644269.2	NP_000432.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC26A4	ENST00000644269.2 linkuse as main transcript	c.415+4A>G		splice_donor_region_variant, intron_variant			NM_000441.2	ENSP00000494017	P1	O43511-1
SLC26A4	ENST00000440056.1 linkuse as main transcript			downstream_gene_variant		4		ENSP00000394760

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152034

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

251052

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135710

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000145

AC:

AN:

1375500

Hom.:

Cov.:

AF XY:

0.00000145

AC XY:

AN XY:

689550

show subpopulations

Gnomad4 AFR exome

AF:

0.0000629

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152034

Hom.:

Cov.:

AF XY:

0.0000539

AC XY:

AN XY:

74274

show subpopulations

Gnomad4 AFR

AF:

0.000169

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000453

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Dec 13, 2016	Variant classified as Uncertain Significance - Favor Pathogenic. The c.415+4A>G variant in SLC26A4 has been reported in the compound heterozygous state with a s econd SLC26A4 variant in 1 Korean individual with hearing loss and enlarged vest ibular aqueducts (Park 2005). This variant has been identified in 2/10202 Afric an chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinsti tute.org; dbSNP rs368280107); however, its frequency is not high enough to rule out a pathogenic role. This variant is located in the 5' splice region. Computat ional tools suggest an impact to splicing. However, this information is not pred ictive enough to determine pathogenicity. In summary, while the clinical signifi cance of this variant is uncertain, available data suggest that this variant is more likely to be pathogenic. -
Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Sep 14, 2021	Variant summary: SLC26A4 c.415+4A>G alters a conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. Several computational tools predict a significant impact on normal splicing: two predict the variant abolishes a 5 prime splicing donor site; one predict the variant weakens a 5 prime donor site. However, one experimental study showed that this variant did not affect normal splicing (Lee_2019). The variant allele was found at a frequency of 8e-06 in 251052 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.415+4A>G has been reported in the literature in individuals affected with hearing loss (Park_2004). This report does not provide unequivocal conclusions about association of the variant with Pendred Syndrome. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. Both laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Pendred syndrome

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Mar 08, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Sep 05, 2021	- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Oct 17, 2022

In silico analysis supports a deleterious effect on splicing; This variant is associated with the following publications: (PMID: 31033086, 15679828) -

Autosomal recessive nonsyndromic hearing loss 4

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Sep 05, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.28

CADD

Benign

DANN

Benign

0.92

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.96

SpliceAI score (max)

0.71

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.71

Position offset: -4

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over