chr12-80302644-G-GT

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_001378609.3(OTOGL):c.3081dupT(p.Leu1028SerfsTer31) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000076 in 1,367,814 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000080 ( 0 hom. )

Consequence

OTOGL
NM_001378609.3 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:5

Conservation

PhyloP100: 0.456

Publications

0 publications found

Variant links:

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

OTOGL links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 12-80302644-G-GT is Pathogenic according to our data. Variant chr12-80302644-G-GT is described in ClinVar as Pathogenic. ClinVar VariationId is 505260.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OTOGL	NM_001378609.3 link	c.3081dupT	p.Leu1028SerfsTer31	frameshift_variant	Exon 28 of 59	ENST00000547103.7	NP_001365538.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OTOGL	ENST00000547103.7 link	c.3081dupT	p.Leu1028SerfsTer31	frameshift_variant	Exon 28 of 59	5	NM_001378609.3	ENSP00000447211.2		Q3ZCN5
OTOGL	ENST00000646859.1 link	c.2946dupT	p.Leu983SerfsTer31	frameshift_variant	Exon 32 of 63			ENSP00000496036.1		A0A2R8YF04

Frequencies

GnomAD3 genomes

AF:

0.0000461

AC:

AN:

151992

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000945

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000883

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000751

AC:

AN:

79880

AF XY:

0.0000906

show subpopulations

Gnomad AFR exome

AF:

0.000173

Gnomad AMR exome

AF:

0.000164

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000762

Gnomad OTH exome

AF:

0.000482

GnomAD4 exome

AF:

0.0000798

AC:

AN:

1215704

Hom.:

Cov.:

AF XY:

0.0000697

AC XY:

AN XY:

588616

show subpopulations

African (AFR)

AF:

0.0000386

AC:

AN:

25912

American (AMR)

AF:

0.0000644

AC:

AN:

15520

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19592

East Asian (EAS)

AF:

0.0000624

AC:

AN:

32046

South Asian (SAS)

AF:

0.00

AC:

AN:

49704

European-Finnish (FIN)

AF:

0.0000328

AC:

AN:

30452

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3856

European-Non Finnish (NFE)

AF:

0.0000910

AC:

AN:

988842

Other (OTH)

AF:

0.0000402

AC:

AN:

49780

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.451

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152110

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74364

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41502

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.0000945

AC:

AN:

10580

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000883

AC:

AN:

67960

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000261

Hom.:

Bravo

AF:

0.0000529

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 84B

Pathogenic:3

Jul 11, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: OTOGL c.3081dupT (p.Leu1028SerfsX31) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. The variant allele was found at a frequency of 7.5e-05 in 79880 control chromosomes. To our knowledge, no occurrence of c.3081dupT in individuals affected with Autosomal Recessive Nonsyndromic Hearing Loss 84B and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 505260). Based on the evidence outlined above, the variant was classified as pathogenic. -

May 23, 2023

Clinical Genetics Laboratory, University Hospital Schleswig-Holstein

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Oct 10, 2024

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as Pathogenic. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with deafness, autosomal recessive 84B (MIM#614944). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0201 - Variant is predicted to cause nonsense-mediated decay (NMD) and loss of protein (premature termination codon is located at least 54 nucleotides upstream of the final exon-exon junction). (SP) 0253 - This variant is hemizygous. (I) 0304 - Variant is present in gnomAD (v3) <0.01 for a recessive condition (7 heterozygotes, 0 homozygotes). (SP) 0701 - Other NMD-predicted variants comparable to the one identified in this case have very strong previous evidence for pathogenicity. These variants have been reported many times as pathogenic (DECIPHER). (SP) 0803 - This variant has limited previous evidence of pathogenicity in unrelated individuals. This variant has been reported twice as pathogenic (ClinVar). (SP) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1201 - Heterozygous variant detected in trans with a second pathogenic variant in a recessive disease. A deletion on 12q21.31 encompassing exons 10-42 of the OTOGL gene was identified on microarray (VCGS ID#23C107899). (I) 1205 - This variant has been shown to be maternally inherited. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

not provided

Pathogenic:1

Oct 11, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Leu1019Serfs*31) in the OTOGL gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in OTOGL are known to be pathogenic (PMID: 23122586). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with OTOGL-related conditions. ClinVar contains an entry for this variant (Variation ID: 505260). For these reasons, this variant has been classified as Pathogenic. -

Rare genetic deafness

Pathogenic:1

Sep 08, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Leu1019fs variant in OTOGL has not been previously reported in individuals with hearing loss. Data from large population studies is insufficient to assess the frequency of this variant. This variant is predicted to cause a frameshift, which alters the protein?s amino acid sequence beginning at position 1019 and l eads to a premature termination codon 31 amino acids downstream. This alteration is then predicted to lead to a truncated or absent protein. Loss of function of the OTOGL gene is an established disease mechanism in autosomal recessive heari ng loss. In summary, this variant meets criteria to be classified as pathogenic for nonsyndromic hearing loss in an autosomal recessive manner based on the pred icted impact of the variant. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.46

Mutation Taster

=2/198

disease causing (ClinVar)

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over