Genetic Variant OTOGL:p.Gly42Gly (chr12-80211955-G-T) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_001378609.3(OTOGL):c.126G>T(p.Gly42Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000705 in 1,418,926 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G42G) has been classified as Benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

OTOGL
NM_001378609.3 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.490

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: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.57).

BP7

Synonymous conserved (PhyloP=0.49 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OTOGL	NM_001378609.3 link	c.126G>T	p.Gly42Gly	synonymous_variant	Exon 4 of 59	ENST00000547103.7	NP_001365538.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
OTOGL	ENST00000547103.7 link	c.126G>T	p.Gly42Gly	synonymous_variant	Exon 4 of 59	5	NM_001378609.3	ENSP00000447211.2	Q3ZCN5
OTOGL	ENST00000646859.1 link	c.126G>T	p.Gly42Gly	synonymous_variant	Exon 9 of 63			ENSP00000496036.1	A0A2R8YF04
OTOGL	ENST00000643417.1 link	n.786G>T		non_coding_transcript_exon_variant	Exon 7 of 23

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.05e-7

AC:

AN:

1418926

Hom.:

Cov.:

AF XY:

0.00000142

AC XY:

AN XY:

703084

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33014

American (AMR)

AF:

0.00

AC:

AN:

40414

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25534

East Asian (EAS)

AF:

0.00

AC:

AN:

38662

South Asian (SAS)

AF:

0.00

AC:

AN:

81810

European-Finnish (FIN)

AF:

0.00

AC:

AN:

37502

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5728

European-Non Finnish (NFE)

AF:

9.12e-7

AC:

AN:

1097006

Other (OTH)

AF:

0.00

AC:

AN:

59256

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.57

CADD

Benign

6.7

(source)

DANN

Benign

0.57

PhyloP100

0.49

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over