chr7-107702032-T-C

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1PM2BP4

The NM_000441.2(SLC26A4):c.2009T>C(p.Val670Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000118 in 1,613,066 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

SLC26A4
NM_000441.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:1

Conservation

PhyloP100: 6.78

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM1

In a domain STAS (size 194) in uniprot entity S26A4_HUMAN there are 17 pathogenic changes around while only 4 benign (81%) in NM_000441.2

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.39119723).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC26A4	NM_000441.2 link	c.2009T>C	p.Val670Ala	missense_variant	Exon 17 of 21	ENST00000644269.2	NP_000432.1	O43511-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SLC26A4	ENST00000644269.2 link	c.2009T>C	p.Val670Ala	missense_variant	Exon 17 of 21		NM_000441.2	ENSP00000494017.1	O43511-1
SLC26A4	ENST00000492030.2 link	n.296T>C		non_coding_transcript_exon_variant	Exon 2 of 6	5
SLC26A4	ENST00000644846.1 link	n.719T>C		non_coding_transcript_exon_variant	Exon 7 of 10			ENSP00000494344.1	A0A2R8Y4W7
SLC26A4	ENST00000480841.5 link	n.*148T>C		downstream_gene_variant		3

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000772

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:

0.0000677

AC:

AN:

251214

Hom.:

AF XY:

0.0000737

AC XY:

AN XY:

135764

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000925

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:

0.0000103

AC:

AN:

1460830

Hom.:

Cov.:

AF XY:

0.0000124

AC XY:

AN XY:

726804

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000328

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152236

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74436

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000773

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000378

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Pendred syndrome

Uncertain:2

Jun 04, 2018

Counsyl

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 05, 2021

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Autosomal recessive nonsyndromic hearing loss 4

Uncertain:1Benign:1

Sep 05, 2021

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Precision Medicine Center, Zhengzhou University

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In a patient with deafness and an enlarged vestibular aqueduct, we identified a homozygous mutation SLC26A4 c.919-2A>G. The patient's father is a carrier of the heterozygous variant SLC26A4 c.919-2A>G, while the mother carries both SLC26A4 c.919-2A>G and c.2009T>C heterozygous variants, yet has normal hearing. The proband's sister also carries the heterozygous variants SLC26A4 c.919-2A>G and c.2009T>C and has normal hearing. Therefore, there are two individuals compound heterozygous for SLC26A4 c.919-2A>G and c.2009T>C, both with normal hearing. PP3_moderate+BS4 -

not provided

Uncertain:1

May 09, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 670 of the SLC26A4 protein (p.Val670Ala). This variant is present in population databases (rs200712253, gnomAD 0.1%). This missense change has been observed in individual(s) with clinical features of Pendred syndrome (PMID: 25372295). ClinVar contains an entry for this variant (Variation ID: 558599). 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 not expected to disrupt SLC26A4 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Pendred syndrome;C3538946:Autosomal recessive nonsyndromic hearing loss 4

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.31

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Uncertain

0.020

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.38

T;T

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.42

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.77

.;T

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.39

T;T

MetaSVM

Uncertain

0.76

MutationAssessor

Uncertain

2.0

M;M

PrimateAI

Benign

0.32

PROVEAN

Uncertain

-2.5

D;.

REVEL

Pathogenic

0.83

Sift

Benign

0.049

D;.

Sift4G

Uncertain

0.034

D;.

Polyphen

0.87

P;P

Vest4

0.84

MVP

0.99

MPC

0.029

ClinPred

0.23

GERP RS

5.6

Varity_R

0.22

gMVP

0.65

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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.

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