chr7-103390426-C-A

Variant names:

• chr7-103390426-C-A
• rs397517962
• NM_198999.3:c.1311+3G>T

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.1311+3G>T variant causes a splice region, intron 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. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: SLC26A5 NM_198999.3 splice_region, intron
• Scores: Splicing: ADA: 0.006521
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.441
• 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: PanelApp Australia, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• 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 (BayesDel_noAF=-0.28).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC26A5	NM_198999.3	c.1311+3G>T		splice_region_variant, intron_variant	Intron 12 of 19	ENST00000306312.8	NP_945350.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC26A5	ENST00000306312.8	c.1311+3G>T		splice_region_variant, intron_variant	Intron 12 of 19	1	NM_198999.3	ENSP00000304783.3
SLC26A5	ENST00000393727.5	c.1311+3G>T		splice_region_variant, intron_variant	Intron 10 of 17	1		ENSP00000377328.1
SLC26A5	ENST00000393723.2	c.1311+3G>T		splice_region_variant, intron_variant	Intron 10 of 16	1		ENSP00000377324.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Feb 14, 2013

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The 1311+3G>T variant in SLC26A5 has not been reported in the literature nor pre viously identified by our laboratory. This variant is located in the 5' splice r egion but occurs outside of the invariant splice site positions (+1/2). Computat ional tools do not suggest an impact to splicing, however, this information is n ot predictive enough to rule out pathogenicity. Additional information is needed to fully assess the clinical significance of the 1311+3G>T variant. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.28
CADD	Benign	17
DANN	Benign	0.75
PhyloP100		0.44

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0065
dbscSNV1_RF	Benign	0.27
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: rs397517962; hg19: chr7-103030873;