rs28362775

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BA1

This summary comes from the ClinGen Evidence Repository: The filtering allele frequency of the c.841G>A (p.Asp281Asn) variant in the COCH gene is 0.5% for African chromosomes by gnomAD (145/24032 with 95% CI), which is a high enough frequency to be classified as benign based on thresholds defined by the ClinGen Hearing Loss Expert Panel for autosomal dominant hearing loss variants (BA1). LINK:https://erepo.genome.network/evrepo/ui/classification/CA7143202/MONDO:0019497/005

Frequency

Genomes: 𝑓 0.0016 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00015 ( 0 hom. )

Consequence

COCH
NM_004086.3 missense

Scores

Clinical Significance

Benign reviewed by expert panel B:6

Conservation

PhyloP100: 3.09

Publications

4 publications found

Variant links:

Genes affected

COCH (HGNC:2180): (cochlin) The protein encoded by this gene is highly conserved in human, mouse, and chicken, showing 94% and 79% amino acid identity of human to mouse and chicken sequences, respectively. Hybridization to this gene was detected in spindle-shaped cells located along nerve fibers between the auditory ganglion and sensory epithelium. These cells accompany neurites at the habenula perforata, the opening through which neurites extend to innervate hair cells. This and the pattern of expression of this gene in chicken inner ear paralleled the histologic findings of acidophilic deposits, consistent with mucopolysaccharide ground substance, in temporal bones from DFNA9 (autosomal dominant nonsyndromic sensorineural deafness 9) patients. Mutations that cause DFNA9 have been reported in this gene. Alternative splicing results in multiple transcript variants encoding the same protein. Additional splice variants encoding distinct isoforms have been described but their biological validities have not been demonstrated. [provided by RefSeq, Oct 2008]

COCH Gene-Disease associations (from GenCC):

nonsyndromic genetic hearing loss
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
autosomal dominant nonsyndromic hearing loss 9
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
hearing loss, autosomal recessive 110
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
autosomal dominant nonsyndromic hearing loss
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

COCH links:

ENSG00000258525 (HGNC:58454):

ENSG00000258525 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BA1

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COCH	NM_004086.3 link	c.841G>A	p.Asp281Asn	missense_variant	Exon 10 of 12	ENST00000396618.9	NP_004077.1	O43405-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COCH	ENST00000396618.9 link	c.841G>A	p.Asp281Asn	missense_variant	Exon 10 of 12	1	NM_004086.3	ENSP00000379862.3		O43405-1

Frequencies

GnomAD3 genomes

AF:

0.00162

AC:

246

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00586

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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:

0.000445

AC:

112

AN:

251470

AF XY:

0.000280

show subpopulations

Gnomad AFR exome

AF:

0.00621

Gnomad AMR exome

AF:

0.000260

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000153

AC:

223

AN:

1461330

Hom.:

Cov.:

AF XY:

0.000128

AC XY:

AN XY:

726998

show subpopulations

African (AFR)

AF:

0.00595

AC:

199

AN:

33472

American (AMR)

AF:

0.000179

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26126

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86238

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111516

Other (OTH)

AF:

0.000232

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.468

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

AF:

0.00161

AC:

246

AN:

152334

Hom.:

Cov.:

AF XY:

0.00156

AC XY:

116

AN XY:

74508

show subpopulations

African (AFR)

AF:

0.00585

AC:

243

AN:

41574

American (AMR)

AF:

0.000196

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68030

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.509

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:

0.000707

Hom.:

Bravo

AF:

0.00204

ESP6500AA

AF:

0.00681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000511

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not provided

Benign:3

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 15, 2019

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 03, 2017

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.841G>A; p.Asp281Asn variant (rs28362775) has not been reported in the medical literature, gene specific variation databases, nor has it been previously identified by our laboratory. This variant is listed in the Genome Aggregation Database (gnomAD) with a frequency of 0.6 percent in the African population (identified on 145 out of 24,032 chromosomes), and has been reported to the ClinVar database (Variation ID: 226529). The aspartic acid at position 281 is moderately conserved across 12 species (Alamut v2.9.0) and computational analyses of the effects of the p.Asp281Asn variant on protein structure and function indicate a neutral effect (SIFT: tolerated, Align GVGD: C0, PolyPhen-2: benign). Based on these observations the p.Asp281Asn is likely to be benign. -

not specified

Benign:1

May 07, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Asp281Asn in Exon 10 of COCH: This variant is not expected to have clinical sign ificance because it has been identified in 0.7% (25/3738) of African American ch romosomes from a broad population by the NHLBI Exome Sequencing Project (http:// evs.gs.washington.edu/EVS; dbSNP rs28362775). -

Nonsyndromic genetic hearing loss

Benign:1

Feb 25, 2019

ClinGen Hearing Loss Variant Curation Expert Panel

Significance:Benign

Review Status:reviewed by expert panel

Collection Method:curation

The filtering allele frequency of the c.841G>A (p.Asp281Asn) variant in the COCH gene is 0.5% for African chromosomes by gnomAD (145/24032 with 95% CI), which is a high enough frequency to be classified as benign based on thresholds defined by the ClinGen Hearing Loss Expert Panel for autosomal dominant hearing loss variants (BA1). -

Autosomal dominant nonsyndromic hearing loss 9

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.40

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.11

.;T;T;.;.;T;T;T

Eigen

Benign

0.082

Eigen_PC

Benign

0.20

FATHMM_MKL

Uncertain

0.81

LIST_S2

Uncertain

0.93

D;.;.;D;D;D;D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.0097

T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.0

.;L;L;.;L;.;.;L

PhyloP100

3.1

PrimateAI

Uncertain

0.69

PROVEAN

Benign

0.50

.;N;.;.;N;N;N;.

REVEL

Benign

0.20

Sift

Benign

0.22

.;T;.;.;T;T;T;.

Sift4G

Benign

0.94

.;T;.;.;T;T;T;.

Polyphen

0.0010

.;B;B;.;.;.;.;B

Vest4

0.17, 0.18, 0.19

MVP

0.89

MPC

0.26

ClinPred

0.021

GERP RS

4.6

Varity_R

0.061

gMVP

0.61

Mutation Taster

=92/8

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