7-103374413-T-C

Variant names:

• chr7-103374413-T-C
• NM_198999.3:c.2221A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_198999.3(SLC26A5):​c.2221A>G​(p.Thr741Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,460,002 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: SLC26A5 NM_198999.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.61
• Publications: 0 publications found

Genes affected

SLC26A5 (HGNC:9359): (solute carrier family 26 member 5) This gene encodes a member of the SLC26A/SulP transporter family. The protein functions as a molecular motor in motile outer hair cells (OHCs) of the cochlea, inducing changes in cell length that act to amplify sound levels. The transmembrane protein is an incomplete anion transporter, and does not allow anions to cross the cell membrane but instead undergoes a conformational change in response to changes in intracellular Cl- levels that results in a change in cell length. The protein functions at microsecond rates, which is several orders of magnitude faster than conventional molecular motor proteins. Mutations in this gene are potential candidates for causing neurosensory deafness. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Nov 2009]

SLC26A5 Gene-Disease associations (from GenCC):

• autosomal recessive nonsyndromic hearing loss 61

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1418427).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198999.3. 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
	SLC26A5	NM_198999.3	MANE Select	c.2221A>G	p.Thr741Ala	missense	Exon 20 of 20	NP_945350.1	P58743-1
	SLC26A5	NM_001167962.2		c.2125A>G	p.Thr709Ala	missense	Exon 19 of 19	NP_001161434.1	P58743-5
	SLC26A5	NM_206883.3		c.2041+2395A>G		intron	N/A	NP_996766.1	P58743-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC26A5	ENST00000306312.8	TSL:1 MANE Select	c.2221A>G	p.Thr741Ala	missense	Exon 20 of 20	ENSP00000304783.3	P58743-1
	SLC26A5	ENST00000393727.5	TSL:1	c.2227A>G	p.Thr743Ala	missense	Exon 18 of 18	ENSP00000377328.1	Q7Z7F4
	SLC26A5	ENST00000393723.2	TSL:1	c.2131A>G	p.Thr711Ala	missense	Exon 17 of 17	ENSP00000377324.1	P58743-6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1460002 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 726322

African (AFR) AF: 0.00 AC: 0 AN: 33418

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86170

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53340

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4368

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1111944

Other (OTH) AF: 0.00 AC: 0 AN: 60216

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.062
BayesDel_addAF	Benign	-0.025	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	18
DANN	Benign	0.94
DEOGEN2	Benign	0.17	T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.51	D
LIST_S2	Benign	0.54	T
M_CAP	Uncertain	0.21	D
MetaRNN	Benign	0.14	T
MetaSVM	Uncertain	-0.22	T
MutationAssessor	Benign	0.0	N
PhyloP100		1.6
PrimateAI	Benign	0.44	T
PROVEAN	Benign	-0.61	N
REVEL	Benign	0.20
Sift	Uncertain	0.026	D
Polyphen		0.37	B
Vest4		0.30
MutPred		0.15		Loss of glycosylation at T741 (P = 0.0035)
MVP		0.64
MPC		0.54
ClinPred		0.28	T
GERP RS		0.88
Varity_R		0.043
gMVP		0.38
Mutation Taster		=90/10	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

hg19: chr7-103014860;