rs397516431
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3_Moderate
The NM_000441.2(SLC26A4):āc.697G>Cā(p.Val233Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000421 in 1,613,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_000441.2 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
SLC26A4 | NM_000441.2 | c.697G>C | p.Val233Leu | missense_variant | 6/21 | ENST00000644269.2 | NP_000432.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
SLC26A4 | ENST00000644269.2 | c.697G>C | p.Val233Leu | missense_variant | 6/21 | NM_000441.2 | ENSP00000494017 | P1 |
Frequencies
GnomAD3 genomes AF: 0.0000395 AC: 6AN: 152086Hom.: 0 Cov.: 30
GnomAD3 exomes AF: 0.000103 AC: 26AN: 251476Hom.: 0 AF XY: 0.0000956 AC XY: 13AN XY: 135916
GnomAD4 exome AF: 0.0000424 AC: 62AN: 1461794Hom.: 0 Cov.: 31 AF XY: 0.0000358 AC XY: 26AN XY: 727206
GnomAD4 genome AF: 0.0000395 AC: 6AN: 152086Hom.: 0 Cov.: 30 AF XY: 0.0000404 AC XY: 3AN XY: 74298
ClinVar
Submissions by phenotype
not provided Pathogenic:1Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Mar 08, 2024 | In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 28215547, 35640668, 33159754, 34170635, 30245029, 33199029, 28576516, 34752165, 30235673, 37017887, 17443271, 33907123, 30579095, 29605365, 31581539, 32459320, 26886089) - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 21, 2024 | This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 233 of the SLC26A4 protein (p.Val233Leu). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This missense change has been observed in individual(s) with congenital hypothyroidism and/or deafness (PMID: 17443271, 25788563, 26886089, 28215547, 32459320, 34170635). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 43564). 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 expected to disrupt SLC26A4 protein function with a positive predictive value of 80%. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | Dec 10, 2020 | - - |
Pendred syndrome Uncertain:3
Uncertain significance, no assertion criteria provided | clinical testing | Natera, Inc. | Sep 16, 2020 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Counsyl | Nov 14, 2017 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Sep 05, 2021 | - - |
Autosomal recessive nonsyndromic hearing loss 4 Pathogenic:1Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Sep 05, 2021 | - - |
Likely pathogenic, no assertion criteria provided | research | Precision Medicine Center, Zhengzhou University | - | - - |
not specified Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Mar 08, 2011 | Variant classified as Uncertain Significance - Favor Pathogenic. The Val233Leu v ariant in SLC26A4 has been reported as a compound heterozygous variant with anot her pathogenic variant in a Chinese proband with hearing loss and enlarged vesti bular aqueduct (EVA) and was absent in 200 race matched control chromosomes (Hu, 2007). However, it was not reported whether this variant was in trans with the second SLC26A4 variant. Furthermore, computational analyses (biochemical amino a cid properties, homology, PolyPhen, SIFT, AlignGVGD) do not provide strong suppo rt for or against pathogenicity. In summary, the clinical significance of this v ariant cannot be determined with certainty at this time. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Apr 03, 2023 | Variant summary: SLC26A4 c.697G>C (p.Val233Leu) results in a conservative amino acid change located in the SLC26A/SulP transporter domain (IPR011547) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.0001 in 251476 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in SLC26A4 causing Pendred Syndrome (0.0001 vs 0.0035), allowing no conclusion about variant significance. c.697G>C has been reported in the literature as a compound heterozygous genotype in individuals affected with enlarged vestibular aqueduct (EVA) (example, Hu_2007, Tian_2021) as well as a non-informative genotype in settings of multigene panel testing for hearing loss, congenital hypothyroidism (CH) (example, Nishio_2015, Fan_2017, Chen_2022, Yamaguchi_2020). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation (VUS, n=4; Likely pathogenic, n=1). Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at