2-26470650-G-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_194248.3(OTOF):c.3966C>G(p.Asp1322Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00115 in 1,614,118 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. D1322D) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00081 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0012 ( 1 hom. )

Consequence

OTOF
NM_194248.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:3O:1

Conservation

PhyloP100: -0.262

Publications

8 publications found

Variant links:

Genes affected

OTOF (HGNC:8515): (otoferlin) Mutations in this gene are a cause of neurosensory nonsyndromic recessive deafness, DFNB9. The short form of the encoded protein has 3 C2 domains, a single carboxy-terminal transmembrane domain found also in the C. elegans spermatogenesis factor FER-1 and human dysferlin, while the long form has 6 C2 domains. The homology suggests that this protein may be involved in vesicle membrane fusion. Several transcript variants encoding multiple isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

OTOF Gene-Disease associations (from GenCC):

autosomal recessive nonsyndromic hearing loss 9
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

OTOF links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.024083018).

BP6

Variant 2-26470650-G-C is Benign according to our data. Variant chr2-26470650-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 21848.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000808 (123/152274) while in subpopulation NFE AF = 0.00147 (100/68026). AF 95% confidence interval is 0.00124. There are 0 homozygotes in GnomAd4. There are 57 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OTOF	NM_194248.3 link	c.3966C>G	p.Asp1322Glu	missense_variant	Exon 32 of 47	ENST00000272371.7	NP_919224.1
OTOF	NM_194323.3 link	c.1665C>G	p.Asp555Glu	missense_variant	Exon 15 of 29	ENST00000339598.8	NP_919304.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OTOF	ENST00000272371.7 link	c.3966C>G	p.Asp1322Glu	missense_variant	Exon 32 of 47	1	NM_194248.3	ENSP00000272371.2
OTOF	ENST00000339598.8 link	c.1665C>G	p.Asp555Glu	missense_variant	Exon 15 of 29	1	NM_194323.3	ENSP00000344521.3

Frequencies

GnomAD3 genomes

AF:

0.000808

AC:

123

AN:

152156

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000851

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000413

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00147

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000724

AC:

182

AN:

251322

AF XY:

0.000685

show subpopulations

Gnomad AFR exome

AF:

0.000369

Gnomad AMR exome

AF:

0.000260

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000185

Gnomad NFE exome

AF:

0.00128

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.00118

AC:

1731

AN:

1461844

Hom.:

Cov.:

AF XY:

0.00117

AC XY:

854

AN XY:

727216

show subpopulations

African (AFR)

AF:

0.000209

AC:

AN:

33480

American (AMR)

AF:

0.000268

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000568

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.000356

AC:

AN:

53378

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00145

AC:

1609

AN:

1112006

Other (OTH)

AF:

0.000563

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.454

Heterozygous variant carriers

198

296

395

494

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

120

180

240

300

<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:

0.000808

AC:

123

AN:

152274

Hom.:

Cov.:

AF XY:

0.000766

AC XY:

AN XY:

74444

show subpopulations

African (AFR)

AF:

0.000144

AC:

AN:

41544

American (AMR)

AF:

0.000850

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5164

South Asian (SAS)

AF:

0.000414

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.0000942

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00147

AC:

100

AN:

68026

Other (OTH)

AF:

0.000473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

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:

0.000814

Hom.:

Bravo

AF:

0.000752

TwinsUK

AF:

0.00135

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000698

AC:

ExAC

AF:

0.000610

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00147

EpiControl

AF:

0.00142

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:3Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:3

Mar 26, 2021

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Observed in one or more patients with hearing loss in published literature; no specific information provided (Varga et al., 2006); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 16371502) -

Mar 12, 2019

Athena Diagnostics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jun 26, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

OTOF: BS2 -

Autosomal recessive nonsyndromic hearing loss 9

Uncertain:2Other:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

GeneReviews

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

- -

Jan 18, 2019

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Uncertain:1

Aug 10, 2018

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant classified as Uncertain Significance - Favor Benign. The p.Asp1322Glu va riant in OTOF has been previously reported by our laboratory in 3 heterozygous C aucasian and 1 heterozygous Latino individuals with hearing loss, but none had a second OTOF variant. The p.Asp1322Glu variant has also been reported as a benig n variant based on its identification in both cases and controls (Varga 2006). I t has also been reported in ClinVar (Variation ID 21848) and has been identified in 0.1% (170/126566) of European chromosomes by gnomAD (http://gnomad.broadinst itute.org; dbSNP rs80356576). Computational prediction tools and conservation an alysis suggest that the p.Asp1322Glu variant may impact the protein, though this information is not predictive enough to determine pathogenicity. In summary, wh ile the clinical significance of the p.Asp1322Glu variant is uncertain, these da ta suggest that it is more likely to be benign. ACMG/AMP Criteria applied: PP3, BS1_Supporting. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.35

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.13

CADD

Benign

1.5

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.12

.;.;.;T;.;.

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.44

LIST_S2

Benign

0.84

T;T;T;T;D;T

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.024

T;T;T;T;T;T

MetaSVM

Uncertain

0.037

MutationAssessor

Benign

1.3

.;.;.;L;L;.

PhyloP100

-0.26

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-2.0

N;N;.;N;N;.

REVEL

Uncertain

0.47

Sift

Benign

0.59

T;T;.;T;T;.

Sift4G

Benign

0.34

T;T;.;T;T;.

Polyphen

0.17

B;B;.;D;.;D

Vest4

0.57

MutPred

0.076

.;.;.;Gain of glycosylation at P1321 (P = 0.0797);Gain of glycosylation at P1321 (P = 0.0797);.;

MVP

0.55

MPC

0.63

ClinPred

0.075

GERP RS

-6.5

Varity_R

0.12

gMVP

0.076

Mutation Taster

=67/33

polymorphism

(source)

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

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over