chr12-80342167-G-T

Variant names:

• chr12-80342167-G-T
• rs902734999
• NM_001378609.3:c.5265+5G>T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001378609.3(OTOGL):​c.5265+5G>T variant causes a splice region, intron change. The variant allele was found at a frequency of 0.000000717 in 1,393,796 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: OTOGL NM_001378609.3 splice_region, intron
• Scores: Splicing: ADA: 0.9985
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.80
• Publications: 4 publications found

Genes affected

OTOGL (HGNC:26901): (otogelin like) The protein encoded by this gene belongs to the otogelin family. This gene is expressed in the inner ear of vertebrates with the highest level of expression seen at the embryonic stage and lowest in adult. Knockdown studies in zebrafish suggest that this gene is essential for normal inner ear function. Mutations in this gene are associated with autosomal recessive deafness. [provided by RefSeq, Dec 2012]

OTOGL Gene-Disease associations (from GenCC):

• autosomal recessive nonsyndromic hearing loss 84B

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, G2P, Labcorp Genetics (formerly Invitae), PanelApp Australia
• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001378609.3. 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
	OTOGL	NM_001378609.3	MANE Select	c.5265+5G>T		splice_region intron	N/A	NP_001365538.2
	OTOGL	NM_001378610.3		c.5265+5G>T		splice_region intron	N/A	NP_001365539.2
	OTOGL	NM_173591.7		c.5265+5G>T		splice_region intron	N/A	NP_775862.4

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OTOGL	ENST00000547103.7	TSL:5 MANE Select	c.5265+5G>T		splice_region intron	N/A	ENSP00000447211.2
	OTOGL	ENST00000646859.1		c.5130+5G>T		splice_region intron	N/A	ENSP00000496036.1
	OTOGL	ENST00000298820.7	TSL:5	c.564+5G>T		splice_region intron	N/A	ENSP00000298820.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.17e-7 AC: 1 AN: 1393796 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 689960

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 31870

American (AMR) AF: 0.00 AC: 0 AN: 37056

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25132

East Asian (EAS) AF: 0.00 AC: 0 AN: 37488

South Asian (SAS) AF: 0.00 AC: 0 AN: 79530

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50560

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5636

European-Non Finnish (NFE) AF: 9.36e-7 AC: 1 AN: 1068708

Other (OTH) AF: 0.00 AC: 0 AN: 57816

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.20
CADD	Uncertain	25
DANN	Uncertain	0.98
PhyloP100		6.8

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.95
SpliceAI score (max)		0.94		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.94		Position offset: -5

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

Other links and lift over

dbSNP: rs902734999; hg19: chr12-80735947;