rs1174526823

Variant names:

• chr7-107663330-A-C
• rs1174526823
• NM_000441.2:c.199A>C
• SLC26A4 p.Thr67Pro

Your query was ambiguous. Multiple possible variants found:

• chr7-107663330-A-C
• chr7-107663330-A-T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 5P and 3B. PM1 PM2 PP2 BP4_Moderate BP6

The NM_000441.2(SLC26A4):​c.199A>C​(p.Thr67Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T67S) has been classified as Likely benign. The gene SLC26A4 is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SLC26A4 NM_000441.2 missense
• Clinical Significance: Benign no assertion criteria provided B:1
• Conservation: PhyloP100: 0.134
• Publications: 0 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: PanelApp Australia, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Pendred syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• 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

Specifications for SLC26A4 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Uncertain_significance. The variant received 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, 8 uncertain in NM_000441.2
• PM2: Very rare variant in population databases, with high coverage
• 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 hearing loss, autosomal recessive, Pendred syndrome, autosomal recessive nonsyndromic hearing loss 4, thyroid hypoplasia, athyreosis.
• BP4: Computational evidence support a benign effect (MetaRNN=0.109223604).
• BP6: Variant 7-107663330-A-C is Benign according to our data. Variant chr7-107663330-A-C is described in ClinVar as Benign. ClinVar VariationId is 988646.Status of the report is no_assertion_criteria_provided, 0 stars.

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.199A>C	p.Thr67Pro	missense	Exon 3 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.199A>C	p.Thr67Pro	missense	Exon 3 of 21	ENSP00000494017.1	O43511-1
	SLC26A4	ENST00000888701.1		c.199A>C	p.Thr67Pro	missense	Exon 2 of 20	ENSP00000558760.1
	SLC26A4	ENST00000888700.1		c.199A>C	p.Thr67Pro	missense	Exon 3 of 20	ENSP00000558759.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Benign

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	-	1	Congenital hypothyroidism (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Uncertain	0.026	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	14
DANN	Benign	0.84
DEOGEN2	Benign	0.23	T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.32	T
M_CAP	Benign	0.035	D
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-0.82	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		0.13
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-2.1	N
REVEL	Uncertain	0.44
Sift	Benign	0.068	T
Sift4G	Uncertain	0.014	D
Varity_R		0.33
gMVP		0.75
Mutation Taster		=71/29	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs1174526823;

hg19: chr7-107303775;