2-26458059-T-C

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM1PP5BP4

The NM_194323.3(OTOF):c.3674A>G(p.Lys1225Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,613,700 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

OTOF
NM_194323.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:2

Conservation

PhyloP100: 7.94

Publications

1 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: Uncertain_significance. The variant received 2 ACMG points.

PM1

In a domain C2 5 (size 127) in uniprot entity OTOF_HUMAN there are 6 pathogenic changes around while only 1 benign (86%) in NM_194323.3

PP5

Variant 2-26458059-T-C is Pathogenic according to our data. Variant chr2-26458059-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 517409.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=2, Pathogenic=1}.

BP4

Computational evidence support a benign effect (MetaRNN=0.21145827). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OTOF	NM_194323.3 link	c.3674A>G	p.Lys1225Arg	missense_variant	Exon 29 of 29	ENST00000339598.8	NP_919304.1	Q9HC10-2
OTOF	NM_194248.3 link	c.*179A>G		3_prime_UTR_variant	Exon 47 of 47	ENST00000272371.7	NP_919224.1	Q9HC10-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OTOF	ENST00000339598.8 link	c.3674A>G	p.Lys1225Arg	missense_variant	Exon 29 of 29	1	NM_194323.3	ENSP00000344521.3		Q9HC10-2
OTOF	ENST00000272371.7 link	c.*179A>G		3_prime_UTR_variant	Exon 47 of 47	1	NM_194248.3	ENSP00000272371.2		Q9HC10-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152232

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:

0.000768

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:

0.0000558

AC:

AN:

250852

AF XY:

0.0000516

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000761

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000411

AC:

AN:

1461468

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726966

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.000151

AC:

AN:

39688

South Asian (SAS)

AF:

0.00

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53406

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111668

Other (OTH)

AF:

0.00

AC:

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74372

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41450

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000768

AC:

AN:

5206

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68036

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000567

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 9

Pathogenic:1

Jan 09, 2025

Institute of Rare Diseases, West China Hospital, Sichuan University

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:research

PM3_VeryStrong;PP1;PP4 -

not specified

Uncertain:1

Jun 20, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Lys1225Arg variant in OTOF has not been previously reported in individuals with hearing loss, but has been identified in 16/18870 East Asian chromosomes b y the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbS NP rs750669994). Although this variant has been seen in the general population, its frequency is not high enough to rule out a pathogenic role. Computational pr ediction tools and conservation analysis do not provide strong support for or ag ainst an impact to the protein. This variant occurs in an alternatively spliced exon of OTOF, which has been shown to be expressed in the human inner ear (Choi 2009). In summary, the clinical significance of the p.Lys1225Arg variant is unce rtain. -

not provided

Uncertain:1

Mar 20, 2025

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.10

CADD

Benign

(source)

DANN

Uncertain

1.0

Eigen

Uncertain

0.55

Eigen_PC

Uncertain

0.54

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.86

D;D

M_CAP

Pathogenic

0.42

MetaRNN

Benign

0.21

T;T

MetaSVM

Uncertain

0.027

PhyloP100

7.9

PROVEAN

Benign

-1.6

N;N

REVEL

Uncertain

0.45

Sift

Benign

0.35

T;T

Sift4G

Benign

0.27

T;T

Polyphen

1.0

D;.

Vest4

0.47

MutPred

0.23

Loss of methylation at K1225 (P = 0.0097);.;

MVP

0.94

ClinPred

0.27

GERP RS

4.8

Mutation Taster

=49/51

disease causing

(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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2-26458059-T-C

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