chr11-17645648-G-A

Position:

• chr11-17645648-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001292063.2(OTOG):​c.8541+5G>A variant causes a splice donor 5th base, intron change. The variant allele was found at a frequency of 0.0000871 in 1,550,708 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. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.000085 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000087 (0 hom.)
• Consequence: OTOG NM_001292063.2 splice_donor_5th_base, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 7.12

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OTOG	NM_001292063.2	c.8541+5G>A		splice_donor_5th_base_variant, intron_variant		ENST00000399397.6	NP_001278992.1
OTOG	NM_001277269.2	c.8577+5G>A		splice_donor_5th_base_variant, intron_variant			NP_001264198.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OTOG	ENST00000399397.6	c.8541+5G>A		splice_donor_5th_base_variant, intron_variant		5	NM_001292063.2	ENSP00000382329	P2
OTOG	ENST00000399391.7	c.8577+5G>A		splice_donor_5th_base_variant, intron_variant		5		ENSP00000382323	A2

Frequencies

GnomAD3 genomes AF: 0.0000854 AC: 13 AN: 152268 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000964

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000882

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000147 AC: 22 AN: 149252 Hom.: 0 AF XY: 0.000174 AC XY: 14 AN XY: 80378

Gnomad AFR exome AF: 0.000148

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000185

Gnomad SAS exome AF: 0.000799

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000231

GnomAD4 exome AF: 0.0000872 AC: 122 AN: 1398322 Hom.: 0 Cov.: 31 AF XY: 0.000110 AC XY: 76 AN XY: 689692

Gnomad4 AFR exome AF: 0.0000633

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000560

Gnomad4 SAS exome AF: 0.000656

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000575

Gnomad4 OTH exome AF: 0.0000517

GnomAD4 genome AF: 0.0000853 AC: 13 AN: 152386 Hom.: 0 Cov.: 33 AF XY: 0.000107 AC XY: 8 AN XY: 74526

Gnomad4 AFR AF: 0.0000962

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.000414

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000882

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000564 Hom.: 0

Bravo AF: 0.0000491

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jun 21, 2016

The c.8577+5G>A variant in OTOG has not been previously reported in individuals with hearing loss. This variant has been identified in 0.4% (1/286) of Latino ch romosomes and in 0.1% (7/7640) of South Asian chromosomes by the Exome Aggregati on Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs754883697). Althoug h this variant has been seen in the general population, its frequency is not hig h enough to rule out a pathogenic role. This variant is located in the 5' splice region. Computational tools do suggest an impact to splicing. However, this inf ormation is not predictive enough to rule out pathogenicity. In summary, the cli nical significance of the c.8577+5G>A variant is uncertain. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jun 18, 2024

Intronic variant directly or indirectly altering the +5 splice site in a gene for which loss of function is a known mechanism of disease, and splice predictors support a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.22
CADD	Benign	22
DANN	Benign	0.95

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.96
SpliceAI score (max)		0.62		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.62		Position offset: -5

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

Publications

LitVar

Other links and lift over

dbSNP: rs754883697; hg19: chr11-17667195;