7-107661769-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_000441.2(SLC26A4):c.128G>T(p.Arg43Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000778 in 1,541,774 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R43H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000072 ( 0 hom. )

Consequence

SLC26A4
NM_000441.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.906

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:

SLC26A4-AS1 (HGNC:22385): (SLC26A4 antisense RNA 1)

SLC26A4-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 3 uncertain in NM_000441.2

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13285625).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC26A4	NM_000441.2 linkuse as main transcript	c.128G>T	p.Arg43Leu	missense_variant	2/21	ENST00000644269.2
SLC26A4-AS1	NR_028137.1 linkuse as main transcript	n.30C>A		non_coding_transcript_exon_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC26A4	ENST00000644269.2 linkuse as main transcript	c.128G>T	p.Arg43Leu	missense_variant	2/21		NM_000441.2	P1	O43511-1
SLC26A4-AS1	ENST00000668981.1 linkuse as main transcript	n.90C>A		non_coding_transcript_exon_variant	1/2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152238

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:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000208

AC:

AN:

143914

Hom.:

AF XY:

0.0000129

AC XY:

AN XY:

77746

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000878

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000173

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000720

AC:

AN:

1389418

Hom.:

Cov.:

AF XY:

0.00000729

AC XY:

AN XY:

685854

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000278

Gnomad4 SAS exome

AF:

0.0000504

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000185

Gnomad4 OTH exome

AF:

0.0000518

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152356

Hom.:

Cov.:

AF XY:

0.0000268

AC XY:

AN XY:

74502

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.0000292

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 11, 2022

The c.128G>T (p.R43L) alteration is located in exon 2 (coding exon 1) of the SLC26A4 gene. This alteration results from a G to T substitution at nucleotide position 128, causing the arginine (R) at amino acid position 43 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Uncertain

0.026

BayesDel_noAF

Benign

-0.20

Cadd

Uncertain

Dann

Uncertain

0.99

DEOGEN2

Uncertain

0.44

T;T;T

Eigen

Benign

0.016

Eigen_PC

Benign

0.10

FATHMM_MKL

Benign

0.67

M_CAP

Uncertain

0.21

MetaRNN

Benign

0.13

T;T;T

MetaSVM

Benign

-0.58

MutationAssessor

Uncertain

2.1

M;M;.

MutationTaster

Benign

0.76

PrimateAI

Uncertain

0.54

PROVEAN

Uncertain

-3.0

D;.;D

REVEL

Uncertain

0.32

Sift

Benign

0.27

T;.;T

Sift4G

Benign

0.17

T;.;T

Polyphen

0.51

P;P;.

Vest4

0.26

MutPred

0.47

Loss of MoRF binding (P = 0.0216);Loss of MoRF binding (P = 0.0216);Loss of MoRF binding (P = 0.0216);

MVP

0.86

MPC

0.013

ClinPred

0.89

GERP RS

4.1

Varity_R

0.35

gMVP

0.54

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.

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