rs587777133

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM5PP3PP5

The NM_144672.4(OTOA):c.1879C>T(p.Pro627Ser) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000013 in 1,461,762 control chromosomes in the GnomAD database, with no homozygous occurrence. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P627R) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

OTOA
NM_144672.4 missense, splice_region

Scores

Splicing: ADA: 0.9592

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:3U:1

Conservation

PhyloP100: 5.26

Publications

3 publications found

Variant links:

Genes affected

OTOA (HGNC:16378): (otoancorin) The protein encoded by this gene is specifically expressed in the inner ear, and is located at the interface between the apical surface of the inner ear sensory epithelia and their overlying acellular gels. It is prposed that this protein is involved in the attachment of the inner ear acellular gels to the apical surface of the underlying nonsensory cells. Mutations in this gene are associated with autosomal recessive deafness type 22 (DFNB22). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2009]

OTOA Gene-Disease associations (from GenCC):

autosomal recessive nonsyndromic hearing loss 22
Inheritance: AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Laboratory for Molecular Medicine, G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae)
nonsyndromic genetic hearing loss
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

OTOA links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM5

Other missense variant is known to change same aminoacid residue: Variant chr16-21722978-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 164825.

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

PP5

Variant 16-21722977-C-T is Pathogenic according to our data. Variant chr16-21722977-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 100655.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OTOA	NM_144672.4 link	c.1879C>T	p.Pro627Ser	missense_variant, splice_region_variant	Exon 18 of 29	ENST00000646100.2	NP_653273.3	Q05BM7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OTOA	ENST00000646100.2 link	c.1879C>T	p.Pro627Ser	missense_variant, splice_region_variant	Exon 18 of 29		NM_144672.4	ENSP00000496564.2		Q7RTW8-5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000358

AC:

AN:

251298

AF XY:

0.0000368

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000130

AC:

AN:

1461762

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

727184

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.000185

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111908

Other (OTH)

AF:

0.0000331

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:3Uncertain:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 22

Pathogenic:2

Mar 01, 2023

Payam Genetics Center, General Welfare Department of North Khorasan Province

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The OTOA c.1879C>T (p.Pro627Ser) is a missens mutation and results at the protein level is a disfunctional or truncated protein, predicted lead to disease.This variant is not present in Iranian population databases. This variant as Pathogenic according to the ACMG classification. -

Sep 01, 2013

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

not provided

Pathogenic:1Uncertain:1

Mar 10, 2022

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 23173898, 24963352, 31527525) -

Jan 18, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 627 of the OTOA protein (p.Pro627Ser). This variant is present in population databases (rs587777133, gnomAD 0.03%). This missense change has been observed in individuals with deafness (PMID: 23173898). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 100655). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.65

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Benign

-0.12

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.25

.;T;.;.;.

Eigen

Uncertain

0.63

Eigen_PC

Uncertain

0.60

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.84

.;T;T;T;T

M_CAP

Pathogenic

0.30

MetaRNN

Uncertain

0.58

D;D;D;D;D

MetaSVM

Uncertain

0.12

MutationAssessor

Uncertain

2.0

.;M;.;.;.

PhyloP100

5.3

PrimateAI

Benign

0.46

PROVEAN

Uncertain

-2.5

.;D;D;D;N

REVEL

Uncertain

0.45

Sift

Uncertain

0.020

.;D;D;D;D

Sift4G

Pathogenic

0.0

.;D;D;D;D

Polyphen

1.0

.;D;.;.;D

Vest4

0.93, 0.87, 0.85, 0.71

MutPred

0.48

.;Gain of helix (P = 0.062);.;.;.;

MVP

0.85

MPC

0.69

ClinPred

0.65

GERP RS

4.8

Varity_R

0.20

gMVP

0.58

Mutation Taster

=61/39

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

0.96

dbscSNV1_RF

Pathogenic

0.88

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over