chr7-107690178-G-A

Variant names:

• chr7-107690178-G-A
• rs397516414
• NM_000441.2:c.1204G>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM3_Strong PS3_Supporting PM2 PP4 PP1 PP3

This summary comes from the ClinGen Evidence Repository: The p.Val402Met variant in SLC26A4 was absent from gnomAD v2.1.1 and v3 (PM2). This variant has been detected in 2 probands with hearing loss. For both patients, a pathogenic or suspected-pathogenic variant was observed in trans (PM3_Strong, PMID:19204907, Partners LMM unpublished data SCV000060082.6). The variant has been reported to segregate in one affected family member (PP1, PMID:19204907). At least one proband with this variant displayed features of sensorineural hearing loss and enlarged vestibular aqueduct, a phenotype specific for Pendred syndrome (PP4, LMM unpublished data SCV000060082.6). Functional studies including fluorescence assays have demonstrated that this variant impacts protein function (PS3_Supporting; PMID:19204907). The REVEL computational prediction analysis tool produced a score of 0.77, which is above the threshold necessary to apply PP3. In summary, this variant meets criteria to be classified as pathogenic for autosomal recessive Pendred syndrome based on the ACMG/AMP criteria applied as specified by the Hearing Loss Expert Panel (PM3_Strong, PM2, PP1, PP3, PP4, PS3_Supporting). LINK:https://erepo.genome.network/evrepo/ui/classification/CA261400/MONDO:0010134/005

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: SLC26A4 NM_000441.2 missense
• Clinical Significance: Pathogenic reviewed by expert panel P:6
• Conservation: PhyloP100: 4.54
• Publications: 4 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: 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

ENSG00000300331 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PS3: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PM3: For more information check the summary or visit ClinGen Evidence Repository.
• PP1: For more information check the summary or visit ClinGen Evidence Repository.
• PP3: For more information check the summary or visit ClinGen Evidence Repository.
• PP4: For more information check the summary or visit ClinGen Evidence Repository.

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.1204G>A	p.Val402Met	missense	Exon 10 of 21	NP_000432.1	O43511-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC26A4	ENST00000644269.2	MANE Select	c.1204G>A	p.Val402Met	missense	Exon 10 of 21	ENSP00000494017.1	O43511-1
	SLC26A4	ENST00000888701.1		c.1204G>A	p.Val402Met	missense	Exon 9 of 20	ENSP00000558760.1
	SLC26A4	ENST00000888700.1		c.1204G>A	p.Val402Met	missense	Exon 10 of 20	ENSP00000558759.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1461436 Hom.: 0 Cov.: 30 AF XY: 0.00000550 AC XY: 4 AN XY: 727054

African (AFR) AF: 0.00 AC: 0 AN: 33448

American (AMR) AF: 0.00 AC: 0 AN: 44712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.00000540 AC: 6 AN: 1111654

Other (OTH) AF: 0.00 AC: 0 AN: 60368

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
3	-	-	Pendred syndrome (3)
1	-	-	Autosomal recessive nonsyndromic hearing loss 4 (1)
1	-	-	not provided (1)
1	-	-	Rare genetic deafness (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.56
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.68	D
Eigen	Pathogenic	0.69
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Uncertain	0.79	D
MutationAssessor	Benign	1.9	L
PhyloP100		4.5
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-1.2	N
REVEL	Pathogenic	0.77
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0040	D
Polyphen		0.98	D
Vest4		0.92
MutPred		0.84		Loss of catalytic residue at V402 (P = 0.1112)
MVP		0.97
MPC		0.064
ClinPred		0.95	D
GERP RS		5.1
Varity_R		0.44
gMVP		0.86
Mutation Taster		=25/75	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs397516414; hg19: chr7-107330623;