Variant 7-107660860-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3PP5

The NM_000441.2(SLC26A4):c.-4+5G>A variant causes a splice donor 5th base, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000657 in 152,188 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

SLC26A4
NM_000441.2 splice_donor_5th_base, intron

Scores

Splicing: ADA: 0.9985

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:2

Conservation

PhyloP100: 3.10

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 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

PP5

Variant 7-107660860-G-A is Pathogenic according to our data. Variant chr7-107660860-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 165245.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=2, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC26A4	NM_000441.2 linkuse as main transcript	c.-4+5G>A		splice_donor_5th_base_variant, intron_variant		ENST00000644269.2
SLC26A4-AS1	NR_028137.1 linkuse as main transcript	n.198-654C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC26A4	ENST00000644269.2 linkuse as main transcript	c.-4+5G>A		splice_donor_5th_base_variant, intron_variant			NM_000441.2	P1	O43511-1
SLC26A4-AS1	ENST00000668981.1 linkuse as main transcript	n.257+742C>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000654

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

114

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

Gnomad4 AFR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74346

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000125

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 4

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

research

King Laboratory, University of Washington

Feb 28, 2023

This variant was found in compound heterozygosity with an SLC26A4 splicing variant that is known to be pathogenic, in a patient with bilateral sensorineural hearing loss of onset <18 years, in a study of pediatric hearing loss conducted by the King Laboratory (Carlson RJ et al. JAMA-OtoHNS 2023). This patient's family has no history of childhood-onset hearing loss. This variant is a single base pair substitution within the 5’ UTR that is predicted to interfere with normal splicing. As of January 2023, this variant has been reported to ClinVar as likely pathogenic and is found in 2 heterozygotes on gnomAD. Based on compound heterozygosity with a loss-of-function variant, consistently predicted functional effect, and goodness of fit of genotype to phenotype, we conclude that this variant is likely pathogenic. -

Rare genetic deafness

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jun 17, 2014

The -4+5G>A variant in SLC26A4 has been identified in one individual with hearin g loss and EVA by our laboratory (LMM unpublished data) likely in trans with an other pathogenic variant SLC26A4 variant. In addition, this variant has not bee n identified in large population studies and is located in the 5' splice region. Computational tools suggest a possible impact to splicing; though this informat ion is not predictive enough to determine pathogenicity. In summary, this varia nt is likely pathogenic. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

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

Mar 24, 2023

- -

SLC26A4-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 17, 2024

The SLC26A4 c.-4+5G>A variant is located in the 5' untranslated region. This variant is located in the 5' untranslated region and is predicted to possibly impact splicing (Alamut Visual v2.11). To our knowledge, this variant has not been reported in the literature but has been reported in ClinVar as being likely in trans to a second pathogenic variant in a patient with hearing loss and enlarged vestibular aqueduct (https://www.ncbi.nlm.nih.gov/clinvar/variation/165245/). This variant is reported in 0.24% of alleles in individuals of Latino descent, and in 2 of ~31,000 total alleles in the gnomAD database. Although we suspect that this variant may be pathogenic, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Benign

0.93

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.89

SpliceAI score (max)

0.75

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.75

Position offset: -5

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