rs111033256

Variant names:

• chr7-107675060-T-A
• rs111033256
• NM_000441.2:c.716T>A

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM1 PM2 PP3_Moderate PP5_Very_Strong

The NM_000441.2(SLC26A4):​c.716T>A​(p.Val239Asp) variant causes a missense change. The variant allele was found at a frequency of 0.0000954 in 1,613,904 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency:
  • Genomes: 𝑓 0.000046 (0 hom., cov: 30)
  • Exomes 𝑓: 0.00010 (0 hom.)
• Consequence: SLC26A4 NM_000441.2 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:28 O:2
• Conservation: PhyloP100: 4.50

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]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PM1: In a transmembrane_region Helical (size 20) in uniprot entity S26A4_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_000441.2
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.866
• PP5: Variant 7-107675060-T-A is Pathogenic according to our data. Variant chr7-107675060-T-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 43566.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr7-107675060-T-A is described in Lovd as [Pathogenic]. Variant chr7-107675060-T-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC26A4	NM_000441.2	c.716T>A	p.Val239Asp	missense_variant	Exon 6 of 21	ENST00000644269.2	NP_000432.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC26A4	ENST00000644269.2	c.716T>A	p.Val239Asp	missense_variant	Exon 6 of 21		NM_000441.2	ENSP00000494017.1

Frequencies

GnomAD3 genomes AF: 0.0000461 AC: 7 AN: 151978 Hom.: 0 Cov.: 30

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00145

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000203 AC: 51 AN: 251468 Hom.: 0 AF XY: 0.000302 AC XY: 41 AN XY: 135912

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00167

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000101 AC: 147 AN: 1461808 Hom.: 0 Cov.: 31 AF XY: 0.000147 AC XY: 107 AN XY: 727210

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00158

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.000116

GnomAD4 genome AF: 0.0000460 AC: 7 AN: 152096 Hom.: 0 Cov.: 30 AF XY: 0.0000807 AC XY: 6 AN XY: 74346

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00145

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000756

ExAC AF: 0.000239 AC: 29

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:28 Other:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Pendred syndrome Pathogenic:10 Other:1

Sep 05, 2021

Genome-Nilou Lab

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 15, 2020

Genetics and Genomic Medicine Centre, NeuroGen Healthcare, NeuroGen Healthcare

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

Neuberg Centre For Genomic Medicine, NCGM

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The missense variant c.716T>A (p.Val239Asp) in SLC26A4 gene has been observed in several individuals and families affected with SLC26A4-related conditions (Tekin M et.al.,2003). Experimental evidence reports the variant to lead to improper intracellular localization and retainment in the endoplasmic retuclum, and impaired protein function (Walsh T et.al.,2006). This variant has been reported to the ClinVar database as Pathogenic. The p.Val239Asp variant is novel (not in any individuals) in 1000 Genomes and allele frequency of 0.02028 % is reported in gnomAD. The amino acid Val at position 239 is changed to a Asp changing protein sequence and it might alter its composition and physico-chemical properties. The variant is predicted to be damaging by both SIFT and PolyPhen2. The residue is conserved across species. The amino acid change p.Val239Asp in SLC26A4 is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. For these reasons, this variant has been classified as Pathogenic. -

Sep 16, 2020

Natera, Inc.

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Jan 14, 2020

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: SLC26A4 c.716T>A (p.Val239Asp) results in a non-conservative amino acid change located in the SLC26A/SulP transporter domain of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.0002 in 251468 control chromosomes. This frequency is not significantly higher than expected for a pathogenic variant in SLC26A4 causing Pendred syndrome (0.0002 vs 0.0035). c.716T>A has been reported in the literature in numerous individuals affected with Pendred syndrome (eg. Khan_2013, Dossena_2011). These data indicate that the variant is very likely to be associated with disease. Experimental evidence reports the variant to lead to improper intracellular localization and retainment in the endoplasmic retuclum, and impaired protein function (Walsh_2006, Dossena_2011). Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as pathogenic/likely pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

Sep 26, 2019

Biochemical Molecular Genetic Laboratory, King Abdulaziz Medical City

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jan 24, 2022

MGZ Medical Genetics Center

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 18, 2014

Counsyl

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: literature only

- -

Jun 04, 2016

Hereditary Research Laboratory, Bethlehem University

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

Severe to Profound SNHL -

Nov 08, 2024

Center for Statistical Genetics, Columbia University

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

Autosomal recessive nonsyndromic hearing loss 4 Pathogenic:7 Other:1

Mar 27, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 22, 2023

Neuberg Centre For Genomic Medicine, NCGM

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The observed missense variant c.716T>Ap.Val239Asp in SLC26A4 gene has been reported previously in individuals with SLC26A4-related conditions. Experimental studies have shown that this missense change affects SLC26A4 function Soh LM, et al., 2015; Shahzad M, et al., 2013; Dossena S, et al., 2011. This variant is reported with the allele frequency 0.02% in the gnomAD Exomes. This variant has been reported to the ClinVar database as Pathogenic/Likely Pathogenic. The amino acid Val at position 239 is changed to a Asp changing protein sequence and it might alter its composition and physico-chemical properties. Multiple lines of computational evidence Polyphen - Possibly damaging, SIFT – Damaging and MutationTaster - Disease causing predict a damaging effect on protein structure and function for this variant. The residue is conserved by GERP++ and PhyloP across 100 vertebrates. For these reasons, this variant has been classified as Pathogenic. -

Jan 03, 2022

3billion, Medical Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000043566, PMID:12676893, PS1_S). The variant has been reported to be in trans with a pathogenic variant as either compound heterozygous or homozygous in at least 2 similarly affected unrelated individuals(PMID: 12676893, 23504402, 30303587, PM3_S). Functional studies provide strong evidence of the variant having a damaging effect on the gene or gene product (PMID: 31599023, PS3_S). In silico tool predictions suggest damaging effect of the variant on gene or gene product (REVEL: 0.935, 3CNET: 0.981, PP3_P). A missense variant is a common mechanism associated with Deafness (PP2_P). It is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.000203, PM2_M).Therefore, this variant is classified as pathogenic according to the recommendation of ACMG/AMP guideline. -

Nov 22, 2021

UAEU Genomics Laboratory, United Arab Emirates University

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

The missense variant NM_000441.2(SLC26A4):c.716T>A (p.Val239Asp) has been observed in several individuals and families affected with SLC26A4-related conditions (PMID: 12974744, 16460646, 23770805, 25394566). The Val239Asp is a common variant in the SLC26A4 gene that is associated with Pendred syndrome in the Pakistani population (PMID:19287372). This variant is observed in 51/30616 (0.1666%) alleles from individuals of gnomAD South Asian background in the gnomAD dataset (Genome Aggregation Database et al., 2020), but was not seen in the homozygous state. Computational prediction tools and conservational analysis predict that the p.Val239Asp missense change has a damaging effect on the protein structure or function. Experimental studies have shown that this missense change has a deleterious effect on protein function and localization (PMID: 16460646, 22116360) For these reasons, this variant has been classified as Pathogenic. -

Aug 01, 2020

King Laboratory, University of Washington

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

SLC26A4 c.716T>A, p.V239D has been shown to decrease SLC26A4 ion transport activity (PMID: 22116360). The variant is homozygous in 10 Palestinian children from a single kindred with pre-lingual hearing loss (Abu Rayyan 2020). It is present in 1 of 1300 Palestinian controls, as a heterozygote, and present in 51/251468 alleles on gnomAD, all heterozygotes. -

Aug 20, 2019

National Institute of Sensory Organs, National Hospital Organization Tokyo Medical Center

Significance: Affects

Review Status: no assertion criteria provided

Collection Method: in vitro;literature only

in vitro experiment -

Mar 14, 2024

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 25, 2020

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Based on the classification scheme VCGS_Germline_v1.1.1, this variant is classified as Pathogenic. Following criteria are met: 0102 - Loss-of-function is a known mechanism of disease for this gene. (N) 0106 - This gene is known to be associated with autosomal recessive disease. (N) 0200 - Variant is predicted to result in a missense amino acid change from valine to aspartic acid (exon 6). (N) 0252 - Variant is homozygous. (N) 0304 - Variant is present in gnomAD <0.01 for a recessive condition (51 heterozygotes, 0 homozygotes). (P) 0501 - Missense variant consistently predicted to be damaging by multiple in silico tools or highly conserved with a major amino acid change. (P) 0600 - Variant is located in an annotated domain or motif (sulfate permease family domain; PDB). (N) 0705 - No comparable variants have previous evidence for pathogenicity. (N) 0801 - Strong previous evidence of pathogenicity in unrelated individuals (ClinVar; Khan, M. et al. (2013)). (P) 1002 - Moderate functional evidence supporting abnormal protein function (Dossena, S. et al. (2011); Walsh, T. et al. (2006)). (P) 1208 - Inheritance information for this variant is not currently available. (N) Legend: (P) - Pathogenic, (N) - Neutral, (B) - Benign -

not provided Pathogenic:6

-

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jun 16, 2023

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 12, 2023

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Common variant accounting for approximately 30% of the mutant alleles of SLC26A4; suggested to be a founder variant in the Pakistani population (Anwar et al., 2009); Published functional studies demonstrate that this variant reduces anion transport activity, affects protein localization and overall severely impairs normal protein function (Park et al., 2003; Dossena et al., 2011); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 27771369, 23965030, 33879512, 25394566, 16460646, 12676893, 12974744, 23336812, 30077349, 23504402, 31389194, 30303587, 23770805, 31599023, 32417962, 34171171, 33231815, 32747562, 33199029, 22116360, 19287372) -

-

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Mar 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 239 of the SLC26A4 protein (p.Val239Asp). This variant is present in population databases (rs111033256, gnomAD 0.2%). This missense change has been observed in individuals with SLC26A4-related conditions (PMID: 12974744, 16460646, 23770805, 25394566). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 43566). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt SLC26A4 protein function with a positive predictive value of 95%. Experimental studies have shown that this missense change affects SLC26A4 function (PMID: 16460646, 22116360). For these reasons, this variant has been classified as Pathogenic. -

Jul 15, 2016

Eurofins Ntd Llc (ga)

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Pendred syndrome;C3538946:Autosomal recessive nonsyndromic hearing loss 4 Pathogenic:2

Mar 28, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 28, 2021

Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PS3, PM3_strong, PP1, PP3, PM1 -

Hearing loss, autosomal recessive Pathogenic:1

-

University of Washington Center for Mendelian Genomics, University of Washington

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Rare genetic deafness Pathogenic:1

Jun 30, 2022

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Val239Asp variant in SLC26A4 has been reported in >20 homozygous or compound heterozygous individuals with hearing loss or Pendred syndrome and segregated with disease in at least 10 affected individuals from multiple families (Tekin 2003 PMID: 12974744, Park 2003 PMID: 12676893, Walsh 2005 PMID: 16460646, Anwar 2009 PMID: 19287372, Soh 2015 PMID: 25394566). It has also been identified in 0.14% (7/4828) of South Asian chromosomes by gnomAD v. 3 (http://gnomad.broadinstitute.org), however this variant is thought to be a founder mutation in this population (Anwar 2009 PMID: 19287372). This variant has also been reported in ClinVar (Variation ID 43566). Computational prediction tools and conservation analyses suggest that this variant may impact the protein, though this information is not predictive enough to determine pathogenicity. In vitro functional studies support an impact on protein function and have shown that protein trafficking is affected and iodide trasport activity is reduced (Walsh 2005 PMID: 16460646, Dossena 2011 PMID: 22116360, Wassano 2020 PMID: 19287372). In summary, this variant meets criteria to be classified as pathogenic for autosomal recessive Pendred Syndrome. ACMG/AMP Criteria applied: PM3_Strong, PP1_Strong, PS3_Moderate, PP3. -

Deafness Pathogenic:1

Oct 04, 2024

Al Jalila Children’s Genomics Center, Al Jalila Childrens Speciality Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

PM3_VeryStrong, PS3, PP4 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Pathogenic	0.40
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.84	D;D
Eigen	Pathogenic	0.70
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.89	.;D
M_CAP	Pathogenic	0.52	D
MetaRNN	Pathogenic	0.87	D;D
MetaSVM	Pathogenic	0.92	D
MutationAssessor	Uncertain	2.4	M;M
PrimateAI	Uncertain	0.65	T
PROVEAN	Pathogenic	-5.7	D;.
REVEL	Pathogenic	0.94
Sift	Uncertain	0.0010	D;.
Sift4G	Uncertain	0.0020	D;.
Polyphen		0.84	P;P
Vest4		0.96
MutPred		0.94		Loss of stability (P = 0.0337);Loss of stability (P = 0.0337);
MVP		0.98
MPC		0.056
ClinPred		0.28	T
GERP RS		5.6
Varity_R		0.97
gMVP		0.98

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: rs111033256; hg19: chr7-107315505;