chr7-107695963-A-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 3P and 9B. PM1PP2BP4_StrongBP6BS2

The NM_000441.2(SLC26A4):c.1468A>C(p.Ile490Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000356 in 1,611,194 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I490F) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00018 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00037 ( 2 hom. )

Consequence

SLC26A4
NM_000441.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:3

Conservation

PhyloP100: 5.30

Publications

13 publications found

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 Gene-Disease associations (from GenCC):

autosomal recessive nonsyndromic hearing loss 4
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae)
Pendred syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
athyreosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
thyroid hypoplasia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

SLC26A4 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

PM1

In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_000441.2

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 167 curated pathogenic missense variants (we use a threshold of 10). The gene has 19 curated benign missense variants. Trascript score misZ: -1.7621 (below the threshold of 3.09). GenCC associations: The gene is linked to autosomal recessive nonsyndromic hearing loss 4, Pendred syndrome, athyreosis, thyroid hypoplasia, hearing loss, autosomal recessive.

BP4

Computational evidence support a benign effect (MetaRNN=0.017947048).

BP6

Variant 7-107695963-A-C is Benign according to our data. Variant chr7-107695963-A-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 177738.

BS2

High Homozygotes in GnomAd4 at 2 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000441.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC26A4	NM_000441.2	MANE Select	c.1468A>C	p.Ile490Leu	missense	Exon 13 of 21	NP_000432.1	O43511-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SLC26A4	ENST00000644269.2	MANE Select	c.1468A>C	p.Ile490Leu	missense	Exon 13 of 21	ENSP00000494017.1	O43511-1
SLC26A4	ENST00000888701.1		c.1468A>C	p.Ile490Leu	missense	Exon 12 of 20	ENSP00000558760.1
SLC26A4	ENST00000888700.1		c.1390A>C	p.Ile464Leu	missense	Exon 12 of 20	ENSP00000558759.1

Frequencies

GnomAD3 genomes

AF:

0.000178

AC:

AN:

152026

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00352

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000382

AC:

AN:

251414

AF XY:

0.000523

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000123

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000374

AC:

546

AN:

1459050

Hom.:

Cov.:

AF XY:

0.000420

AC XY:

305

AN XY:

726036

show subpopulations

African (AFR)

AF:

0.0000599

AC:

AN:

33392

American (AMR)

AF:

0.0000895

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26108

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39684

South Asian (SAS)

AF:

0.00288

AC:

248

AN:

86212

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.000234

AC:

260

AN:

1109482

Other (OTH)

AF:

0.000514

AC:

AN:

60278

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.465

Heterozygous variant carriers

103

129

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000177

AC:

AN:

152144

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74368

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41500

American (AMR)

AF:

0.00

AC:

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00352

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10582

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.000118

AC:

AN:

67996

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.477

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000173

Hom.:

Bravo

AF:

0.000110

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ExAC

AF:

0.000371

AC:

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Pendred syndrome (3)

Autosomal recessive nonsyndromic hearing loss 4 (2)

not provided (2)

not specified (2)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Uncertain

0.040

BayesDel_noAF

Pathogenic

0.28

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.20

Eigen

Uncertain

0.35

Eigen_PC

Uncertain

0.45

FATHMM_MKL

Uncertain

0.96

LIST_S2

Benign

0.85

M_CAP

Benign

0.084

MetaRNN

Benign

0.018

MetaSVM

Uncertain

0.56

MutationAssessor

Benign

0.92

PhyloP100

5.3

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.4

REVEL

Pathogenic

0.70

Sift

Benign

0.58

Sift4G

Benign

0.21

Polyphen

0.19

Vest4

0.69

MVP

0.89

MPC

0.049

ClinPred

0.083

GERP RS

6.1

Varity_R

0.40

gMVP

0.62

Mutation Taster

=57/43

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over