NM_000441.2:c.412G>A

Variant names:

• chr7-107672245-G-A
• rs111033199
• NM_000441.2:c.412G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM1 PM2 PM5 PP2

The NM_000441.2(SLC26A4):​c.412G>A​(p.Val138Ile) variant causes a missense change. The variant allele was found at a frequency of 0.000000708 in 1,412,088 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V138F) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: SLC26A4 NM_000441.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.29
• Publications: 38 publications found

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: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
• 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

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM1: In a hotspot region, there are 16 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 10 uncertain in NM_000441.2
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-107672245-G-T is described in ClinVar as Pathogenic. ClinVar VariationId is 4835.Status of the report is reviewed_by_expert_panel, 3 stars.
• 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.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC26A4	NM_000441.2	MANE Select	c.412G>A	p.Val138Ile	missense	Exon 4 of 21	NP_000432.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC26A4	ENST00000644269.2	MANE Select	c.412G>A	p.Val138Ile	missense	Exon 4 of 21	ENSP00000494017.1
	SLC26A4	ENST00000440056.1	TSL:4	c.*19G>A		downstream_gene	N/A	ENSP00000394760.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 7.08e-7 AC: 1 AN: 1412088 Hom.: 0 Cov.: 24 AF XY: 0.00000142 AC XY: 1 AN XY: 705516

African (AFR) AF: 0.00 AC: 0 AN: 32492

American (AMR) AF: 0.00 AC: 0 AN: 44660

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25842

East Asian (EAS) AF: 0.00 AC: 0 AN: 39392

South Asian (SAS) AF: 0.0000117 AC: 1 AN: 85204

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53256

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5654

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1066954

Other (OTH) AF: 0.00 AC: 0 AN: 58634

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Uncertain	0.099	D
BayesDel_noAF	Benign	-0.10
CADD	Uncertain	25
DANN	Benign	0.97
DEOGEN2	Uncertain	0.42	T
Eigen	Benign	0.19
Eigen_PC	Uncertain	0.29
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.87	D
M_CAP	Uncertain	0.16	D
MetaRNN	Uncertain	0.60	D
MetaSVM	Uncertain	0.27	D
MutationAssessor	Benign	1.4	L
PhyloP100		4.3
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-0.55	N
REVEL	Uncertain	0.52
Sift	Benign	0.43	T
Sift4G	Benign	0.37	T
Polyphen		0.53	P
Vest4		0.41
MutPred		0.67		Gain of catalytic residue at P140 (P = 0.0488)
MVP		0.97
MPC		0.012
ClinPred		0.71	D
GERP RS		5.1
Varity_R		0.20
gMVP		0.58
Mutation Taster		=56/44	polymorphism

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

Other links and lift over

dbSNP: rs111033199; hg19: chr7-107312690;