7-107672245-G-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PS4PP1_ModeratePS3_SupportingPP4PP3PM3PM2_Supporting

This summary comes from the ClinGen Evidence Repository: The p.Val138Phe variant in SLC26A4 has been detected in over 4 patients with Pendred syndrome or hearing loss with enlarged vestibular aqueducts who harbored a pathogenic or suspected pathogenic variant in trans with p.Val138Phe (PM3_VS; PMID:17503324, 15689455, 20597900, 18285825, 23965030, 24224479, 21551164, 23273637, 12788906, 16570074). This variant was found to have a statistically higher prevalence in affected individuals over controls (PS4; PMID:25999548, 23336812, 26683941). The p.Val138Phe variant in SLC26A4 has been reported to segregate with hearing loss in at least 2 family members (PP1_M; PMID:12788906). The allele frequency of the p.Val138Phe variant in the SLC26A4 gene is 0.03% (38/126540) of European chromosomes by the Genome Aggregation Database (http://gnomad.broadinstitute.org), which is a low enough frequency to award PM2_Supporting based on the thresholds defined by the ClinGen Hearing Loss Expert Panel for autosomal recessive hearing loss (PM2_P). Computational prediction tools and conservation analysis suggest that the p.Val138Phe variant may impact the protein (PP3). At least one patient with a variant in this gene displayed features of EVA and/or Mondini malformation which are consistent with Pendred syndrome (PP4; PMID:12788906, 23273637). A functional study performed in HeLa and human embryonic kidney cell lines demonstrated that pendrin harboring the p.Val138Phe variant did not localize to the cell membrane. However, there was no effect on iodide efflux (PS3_P; PMID:11932316). In summary, this variant meets criteria to be classified as pathogenic for autosomal recessive Pendred syndrome/EVA based on the ACMG/AMP criteria applied: PM3_VS, PS4, PP1_M, PM2_Supporting, PP3, PP4, PS3_P. LINK:https://erepo.genome.network/evrepo/ui/classification/CA253312/MONDO:0010134/005

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 31)
Exomes 𝑓: 0.00027 ( 1 hom. )

Consequence

SLC26A4
NM_000441.2 missense

Scores

12
6
1

Clinical Significance

Pathogenic reviewed by expert panel P:19

Conservation

PhyloP100: 4.29
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]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PS3
For more information check the summary or visit ClinGen Evidence Repository.
PS4
For more information check the summary or visit ClinGen Evidence Repository.
PM2
For more information check the summary or visit ClinGen Evidence Repository.
PM3
For more information check the summary or visit ClinGen Evidence Repository.
PP1
For more information check the summary or visit ClinGen Evidence Repository.
PP3
For more information check the summary or visit ClinGen Evidence Repository.
PP4
For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
SLC26A4NM_000441.2 linkc.412G>T p.Val138Phe missense_variant Exon 4 of 21 ENST00000644269.2 NP_000432.1 O43511-1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
SLC26A4ENST00000644269.2 linkc.412G>T p.Val138Phe missense_variant Exon 4 of 21 NM_000441.2 ENSP00000494017.1 O43511-1
SLC26A4ENST00000440056.1 linkc.*19G>T downstream_gene_variant 4 ENSP00000394760.1 C9JQG1

Frequencies

GnomAD3 genomes
AF:
0.000184
AC:
28
AN:
151896
Hom.:
0
Cov.:
31
show subpopulations
Gnomad AFR
AF:
0.0000967
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.000131
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:
0.000309
Gnomad OTH
AF:
0.000478
GnomAD3 exomes
AF:
0.000175
AC:
44
AN:
251236
Hom.:
0
AF XY:
0.000162
AC XY:
22
AN XY:
135788
show subpopulations
Gnomad AFR exome
AF:
0.0000615
Gnomad AMR exome
AF:
0.0000578
Gnomad ASJ exome
AF:
0.000199
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.000326
Gnomad OTH exome
AF:
0.000327
GnomAD4 exome
AF:
0.000268
AC:
379
AN:
1412074
Hom.:
1
Cov.:
24
AF XY:
0.000257
AC XY:
181
AN XY:
705508
show subpopulations
Gnomad4 AFR exome
AF:
0.0000308
Gnomad4 AMR exome
AF:
0.0000448
Gnomad4 ASJ exome
AF:
0.000193
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.0000751
Gnomad4 NFE exome
AF:
0.000332
Gnomad4 OTH exome
AF:
0.000222
GnomAD4 genome
AF:
0.000184
AC:
28
AN:
152014
Hom.:
0
Cov.:
31
AF XY:
0.000121
AC XY:
9
AN XY:
74322
show subpopulations
Gnomad4 AFR
AF:
0.0000964
Gnomad4 AMR
AF:
0.000131
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.00
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.000309
Gnomad4 OTH
AF:
0.000473
Alfa
AF:
0.000235
Hom.:
0
Bravo
AF:
0.000204
TwinsUK
AF:
0.000539
AC:
2
ALSPAC
AF:
0.00
AC:
0
ESP6500AA
AF:
0.000227
AC:
1
ESP6500EA
AF:
0.00
AC:
0
ExAC
AF:
0.000206
AC:
25
EpiCase
AF:
0.000109
EpiControl
AF:
0.0000593

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:19
Revision: reviewed by expert panel
LINK: link

Submissions by phenotype

Pendred syndrome Pathogenic:7
Dec 20, 2019
Myriad Genetics, Inc.
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

NM_000441.1(SLC26A4):c.412G>T(V138F) is classified as pathogenic in the context of Pendred syndrome. Sources cited for classification include the following: PMID 19204907, 15355436, 11375792, 21551164, 15689455, 12788906, 23273637, 19017801, 9618167, 11932316, 9070918 and 9618166. Classification of NM_000441.1(SLC26A4):c.412G>T(V138F) is based on the following criteria: This is a well-established pathogenic variant in the literature that has been observed more frequently in patients with clinical diagnoses than in healthy populations. Please note: this variant was assessed in the context of healthy population screening. -

Jun 01, 2003
OMIM
Significance: Pathogenic
Review Status: no assertion criteria provided
Collection Method: literature only

- -

Sep 19, 2018
ClinGen Hearing Loss Variant Curation Expert Panel
Significance: Pathogenic
Review Status: reviewed by expert panel
Collection Method: curation

The p.Val138Phe variant in SLC26A4 has been detected in over 4 patients with Pendred syndrome or hearing loss with enlarged vestibular aqueducts who harbored a pathogenic or suspected pathogenic variant in trans with p.Val138Phe (PM3_VS; PMID: 17503324, 15689455, 20597900, 18285825, 23965030, 24224479, 21551164, 23273637, 12788906, 16570074). This variant was found to have a statistically higher prevalence in affected individuals over controls (PS4; PMID: 25999548, 23336812, 26683941). The p.Val138Phe variant in SLC26A4 has been reported to segregate with hearing loss in at least 2 family members (PP1_M; PMID: 12788906). The allele frequency of the p.Val138Phe variant in the SLC26A4 gene is 0.03% (38/126540) of European chromosomes by the Genome Aggregation Database (http://gnomad.broadinstitute.org), which is a low enough frequency to award PM2_Supporting based on the thresholds defined by the ClinGen Hearing Loss Expert Panel for autosomal recessive hearing loss (PM2_P). Computational prediction tools and conservation analysis suggest that the p.Val138Phe variant may impact the protein (PP3). At least one patient with a variant in this gene displayed features of EVA and/or Mondini malformation which are consistent with Pendred syndrome (PP4; PMID: 12788906, 23273637). A functional study performed in HeLa and human embryonic kidney cell lines demonstrated that pendrin harboring the p.Val138Phe variant did not localize to the cell membrane. However, there was no effect on iodide efflux (PS3_P; PMID: 11932316). In summary, this variant meets criteria to be classified as pathogenic for autosomal recessive Pendred syndrome/EVA based on the ACMG/AMP criteria applied: PM3_VS, PS4, PP1_M, PM2_Supporting, PP3, PP4, PS3_P. -

-
Otorhinolaryngology Lab - LIM32, University of Sao Paulo School of Medicine Clinics Hospital
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: research

in compound heterozygosis with the c.554G>C variant in a subject with bilateral non-syndromic sensorineural prelingual hearing loss (sporadic) -

Sep 16, 2020
Natera, Inc.
Significance: Pathogenic
Review Status: no assertion criteria provided
Collection Method: clinical testing

- -

May 15, 2020
Molecular Diagnostics Lab, Nemours Children's Health, Delaware
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Sep 09, 2024
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.412G>T (p.Val138Phe) results in a non-conservative amino acid change located in the SLC26A/SulP transporter domain (IPR011547) 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 0.00018 in 251236 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in SLC26A4 causing Pendred Syndrome (0.00018 vs 0.0035), allowing no conclusion about variant significance. c.412G>T has been reported in the literature in multiple individuals affected with Pendred Syndrome (example: Mey_2019). These data indicate that the variant is very likely to be associated with disease. The following publication has been ascertained in the context of this evaluation (PMID: 31633822). ClinVar contains an entry for this variant (Variation ID: 4835). Based on the evidence outlined above, the variant was classified as pathogenic. -

not provided Pathogenic:4
Mar 04, 2025
Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Jul 11, 2018
Eurofins Ntd Llc (ga)
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Jun 29, 2020
GeneDx
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

Published functional studies demonstrate a damaging effect due to aberrant protein processing, with retention of pendrin in the endoplasmic reticulum and absence of proper pendrin assembly at the cell membrane (Taylor et al., 2002); Common variant in Caucasian populations, accounting for approximately 12% of pathogenic alleles in published studies of Western European individuals (Tsukada et al., 2015); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Classified as pathogenic by the ClinGen Hearing Loss Expert Panel (Oza et al., 2018; ClinVar SCV000840515.3; Landrum et al., 2016); This variant is associated with the following publications: (PMID: 9618166, 21551164, 17503324, 23336812, 19608655, 11932316, 26969326, 23273637, 12788906, 26744121, 29986705, 30473558, 30762457, 29320412, 29984802, 27771369, 18285825, 26683941, 25999548, 24224479, 16570074, 15689455, 23965030, 20597900, 31980526, 31589614) -

Jan 30, 2025
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 phenylalanine, which is neutral and non-polar, at codon 138 of the SLC26A4 protein (p.Val138Phe). This variant is present in population databases (rs111033199, gnomAD 0.03%). This missense change has been observed in individuals with Pendred syndrome (PMID: 9618166, 11932316, 12788906, 21551164, 23273637, 24224479, 26969326). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 4835). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt SLC26A4 protein function with a positive predictive value of 80%. Experimental studies have shown that this missense change affects SLC26A4 function (PMID: 11932316). For these reasons, this variant has been classified as Pathogenic. -

Autosomal recessive nonsyndromic hearing loss 4 Pathogenic:2
Oct 21, 2021
Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

PM3_Very_Strong, PS4, PP1_Moderate, PM2_Supporting, PP3, PP4, PS3_Supporting -

Mar 18, 2024
Baylor Genetics
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

SLC26A4-related disorder Pathogenic:2
Apr 27, 2017
Illumina Laboratory Services, Illumina
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

Across a selection of the available literature, the SLC26A4 c.412G>T (p.Val138Phe) missense variant has been identified in a total of 23 patients with hearing loss or Pendred syndrome, including in four in a homozygous state, 14 in a compound heterozygous state and five in a heterozygous state in whom a second variant was not identified. The variant was also found in a heterozygous state in at least two unaffected family members (Van Hauwe et al. 1998; Coyle et al. 1998; Campbell et al. 2001; Gonzales-Trevino et al. 2001; Taylor et al. 2002; Borck et al. 2003; Pryor et al. 2005; Pera et al. 2008; Kandasamy et al. 2011; Landa et al. 2013). Segregation with disease is reported to have been shown in several families (Van Hauwe et al. 1998; Gonzales-Trevino et al. 2001). The variant was absent from 214 controls and is reported at a frequency of 0.00033 in the European (non-Finnish) population of the Exome Aggregation Consortium. The Val138 residue is conserved among several other related sulfate transporter genes from different species. Functional studies have shown that the p.Val138Phe variant protein is retained in the endoplasmic reticulum and fails to reach the cell membrane leading to loss of protein activity (Taylor et al. 2002). Based on the collective evidence, the p.Val138Phe variant is classified as pathogenic for SLC26A4-related disorders. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

May 14, 2024
PreventionGenetics, part of Exact Sciences
Significance: Pathogenic
Review Status: no assertion criteria provided
Collection Method: clinical testing

The SLC26A4 c.412G>T variant is predicted to result in the amino acid substitution p.Val138Phe. This variant has been reported to be causative for Pendred syndrome (Van et al. 1998. PubMed ID: 9618166; Borck et al. 2003. PubMed ID: 12788906; de Moraes et al. 2013. PubMed ID: 23273637). Functional studies show this variant results in loss of proper localization of the SLC26A4 protein to the cell membrane (Taylor et al. 2002. PubMed ID: 11932316). This variant is reported in 0.029% of alleles in individuals of European (Non-Finnish) descent in gnomAD. This variant is interpreted as pathogenic. -

Pendred syndrome;C3538946:Autosomal recessive nonsyndromic hearing loss 4 Pathogenic:2
Jun 14, 2024
Fulgent Genetics, Fulgent Genetics
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Mar 22, 2023
Clinical Genomics Laboratory, Stanford Medicine
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

The p.Val138Phe variant in the SLC26A4 gene has been previously reported in the homozygous or compound heterozygous state in at least 10 individuals with Pendred syndrome or nonsyndromic hearing loss with enlarged vestibular aqueduct (Borck et al., 2003; Pryor et al., 2005; Pera et al., 2008; Pourová et al., 2010; Kandasamy et al., 2011). This variant also segregated with disease in at least 2 affected individuals from 1 family (Borck et al., 2003).This variant has been identified in 38/129,014 European non-Finnish chromosomes (46/282,472 chromosomes overall) by the Genome Aggregation Database (http://gnomad.broadinstitute.org/). Although this variant has been seen in the general population, its frequency is low enough to be consistent with a recessive carrier frequency. This variant is present in ClinVar (Variation ID: 4835). A functional study of the p.Val138Phe variant demonstrated that this variant results in altered cell membrane localization of the SLC26A4 protein (Taylor et al., 2002). Computational tools predict that the p.Val138Phe variant is deleterious; however, the accuracy of in silico algorithms is limited. These data were assessed using the ACMG/AMP variant interpretation guidelines. In summary, there is sufficient evidence to classify the p.Val138Phe variant as pathogenic for autosomal recessive Pendred syndrome or nonsyndromic hearing loss with enlarged vestibular aqueduct based on the information above. [ACMG evidence codes used: PM3_Very Strong; PM2_Supporting; PS3_Supporting; PP3 -

Hearing impairment Pathogenic:1
Apr 12, 2021
Department of Otolaryngology – Head & Neck Surgery, Cochlear Implant Center
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

PS1_Strong, PM2_Supporting, PM5_Moderate, PP3_Supporting -

Rare genetic deafness Pathogenic:1
Sep 16, 2020
Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

The p.Val138Phe variant in SLC26A4 has been reported in more than 20 individuals with clinical features of Pendred syndrome or DFNB4 hearing loss, at least 10 of whom were homozygous or compound heterozygous (Borck 2003 PMID: 12788906, Campbell 2001 PMID: 11317356, Coyle 1998 PMID: 9618167, de Moraes 2013 PMID: 23273637, Gonzalez Trevino 2001 PMID: 11375792, Kandasamy 2011 PMID: 21551164, Pourova 2010 PMID: 20597900, Pryor 2005 PMID: 15689455, Taylor 2002 PMID: 11932316, Van Hauwe 1998 PMID: 9618166, LMM data). It has been identified in 0.03% (38/126540) European chromosomes by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; rs111033199); however, this low frequency is consistent with the carrier frequency in the general population. In vitro functional studies provide some evidence that the p.Val138Phe variant may impact protein function (Taylor 2002 PMID: 11932316). In summary, this variant meets criteria to be classified as pathogenic for Pendred syndrome or nonsyndromic hearing loss in an autosomal recessive manner. ACMG/AMP criteria applied: PM3_VeryStrong, PS4, PM2_Supporting, PS3_Supporting. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.78
BayesDel_addAF
Pathogenic
0.24
D
BayesDel_noAF
Pathogenic
0.41
CADD
Pathogenic
28
DANN
Uncertain
1.0
DEOGEN2
Uncertain
0.74
D;D
Eigen
Pathogenic
0.76
Eigen_PC
Pathogenic
0.71
FATHMM_MKL
Pathogenic
0.97
D
LIST_S2
Uncertain
0.90
.;D
M_CAP
Pathogenic
0.42
D
MetaRNN
Pathogenic
0.86
D;D
MetaSVM
Pathogenic
0.96
D
MutationAssessor
Pathogenic
3.2
M;M
PrimateAI
Uncertain
0.60
T
PROVEAN
Uncertain
-3.8
D;.
REVEL
Pathogenic
0.90
Sift
Uncertain
0.0010
D;.
Sift4G
Pathogenic
0.0010
D;.
Polyphen
1.0
D;D
Vest4
0.91
MVP
0.99
MPC
0.012
ClinPred
0.25
T
GERP RS
5.1
Varity_R
0.83
gMVP
0.93

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

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

Other links and lift over

dbSNP: rs111033199; hg19: chr7-107312690; API