11-17642176-C-A

Variant names:

• chr11-17642176-C-A
• rs188322721
• NM_001292063.2:c.8345C>A

Variant summary

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

The NM_001292063.2(OTOG):​c.8345C>A​(p.Thr2782Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00000129 in 1,550,250 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T2782M) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: OTOG NM_001292063.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.06
• Publications: 1 publications found

Genes affected

OTOG (HGNC:8516): (otogelin) The protein encoded by this gene is a component of the acellular membranes of the inner ear. Disruption of the orthologous mouse gene shows that it plays a role in auditory and vestibular functions. It is involved in fibrillar network organization, the anchoring of otoconial membranes and cupulae to the neuroepithelia, and likely in sound stimulation resistance. Mutations in this gene cause autosomal recessive nonsyndromic deafness, type 18B. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2014]

OTOG Gene-Disease associations (from GenCC):

• autosomal recessive nonsyndromic hearing loss 18B

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Ambry Genetics
• 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: MetaRNN computational evidence supports a deleterious effect, 0.761

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001292063.2. 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
	OTOG	NM_001292063.2	MANE Select	c.8345C>A	p.Thr2782Lys	missense	Exon 53 of 56	NP_001278992.1	H9KVB3
	OTOG	NM_001277269.2		c.8381C>A	p.Thr2794Lys	missense	Exon 52 of 55	NP_001264198.1	Q6ZRI0-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OTOG	ENST00000399397.6	TSL:5 MANE Select	c.8345C>A	p.Thr2782Lys	missense	Exon 53 of 56	ENSP00000382329.2	H9KVB3
	OTOG	ENST00000399391.7	TSL:5	c.8381C>A	p.Thr2794Lys	missense	Exon 52 of 55	ENSP00000382323.2	Q6ZRI0-1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152232 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

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: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000676 AC: 1 AN: 147966 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000928

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 7.15e-7 AC: 1 AN: 1397900 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 689444

⚠️ 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: 31594

American (AMR) AF: 0.00 AC: 0 AN: 35686

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25172

East Asian (EAS) AF: 0.0000280 AC: 1 AN: 35734

South Asian (SAS) AF: 0.00 AC: 0 AN: 79182

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48132

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5694

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078718

Other (OTH) AF: 0.00 AC: 0 AN: 57988

⚠️ 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 AF: 0.00000656 AC: 1 AN: 152350 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74498

African (AFR) AF: 0.0000240 AC: 1 AN: 41590

American (AMR) AF: 0.00 AC: 0 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5174

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68028

Other (OTH) AF: 0.00 AC: 0 AN: 2116

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.62
BayesDel_addAF	Benign	-0.087	T
BayesDel_noAF	Benign	-0.16
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.33	T
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.75	T
M_CAP	Uncertain	0.17	D
MetaRNN	Pathogenic	0.76	D
MetaSVM	Benign	-0.97	T
MutationAssessor	Uncertain	2.9	M
PhyloP100		7.1
PrimateAI	Uncertain	0.70	T
PROVEAN	Pathogenic	-5.3	D
REVEL	Benign	0.27
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Vest4		0.67
MutPred		0.60		Gain of ubiquitination at T2794 (P = 0.0258)
MVP		0.20
ClinPred		1.0	D
GERP RS		5.1
Varity_R		0.88
gMVP		0.75
Mutation Taster		=39/61	disease causing

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

dbSNP: rs188322721; hg19: chr11-17663723;