dbSNP rs727504567: MYO6:p.Arg80* (chr6-75828590-C-T) – ACMG Classification: Pathogenic (11 pts)

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1PP1PM2_SupportingPS4_Supporting

This summary comes from the ClinGen Evidence Repository: The NM_004999.4:c.238C>T (p.Arg80Ter) variant in MYO6 is a nonsense variant predicted to cause a premature stop codon in biologically-relevant-exon 4 and is predicted to lead to nonsense mediated decay in a gene in which loss-of-function is an established disease mechanism (PVS1). The highest population minor allele frequency in gnomAD v2.1.1 is 0.0008% (1/113330 alleles) in the European (non-Finnish) population, which is lower than the ClinGen Hearing Loss VCEP threshold (≤0.002%) for PM2_Supporting. This variant has been reported in 2 families with teenage onset progressive sensorineural hearing loss, both displaying an autosomal dominant pattern of inheritance (PS4_Supporting; PMID:32143290, 33111345). The variant has been reported to segregate with hearing loss in 2 affected family members from 1 family (PP1; PMID:33111345). In summary, this variant meets the criteria to be classified as Pathogenic for autosomal dominant hearing loss, based on the ACMG/AMP criteria applied, as specified by the ClinGen Hearing Loss Variant Curation Expert Panel: (PVS1, PM2_Supporting, PS4_Supporting, PP1). (VCEP specifications version 2.0.0; December 21, 2022) LINK:https://erepo.genome.network/evrepo/ui/classification/CA183381/MONDO:0019497/005

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

MYO6
NM_004999.4 stop_gained

Scores

Clinical Significance

Pathogenic reviewed by expert panel P:6

Conservation

PhyloP100: 4.46

Publications

4 publications found

Variant links:

Genes affected

MYO6 (HGNC:7605): (myosin VI) This gene encodes a reverse-direction motor protein that moves toward the minus end of actin filaments and plays a role in intracellular vesicle and organelle transport. The protein consists of a motor domain containing an ATP- and an actin-binding site and a globular tail which interacts with other proteins. This protein maintains the structural integrity of inner ear hair cells and mutations in this gene cause non-syndromic autosomal dominant and recessive hearing loss. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Jul 2014]

MYO6 Gene-Disease associations (from GenCC):

autosomal dominant nonsyndromic hearing loss 22
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics
nonsyndromic genetic hearing loss
Inheritance: AR, AD Classification: DEFINITIVE, MODERATE Submitted by: G2P, ClinGen
autosomal recessive nonsyndromic hearing loss 37
Inheritance: AR Classification: STRONG, MODERATE Submitted by: PanelApp Australia, Ambry Genetics, Labcorp Genetics (formerly Invitae)
autosomal dominant nonsyndromic hearing loss
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
progressive sensorineural hearing loss-hypertrophic cardiomyopathy syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

MYO6 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 11 ACMG points.

PVS1

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

PS4

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

PM2

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

PP1

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004999.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MYO6	NM_004999.4	MANE Select	c.238C>T	p.Arg80*	stop_gained	Exon 4 of 35	NP_004990.3
MYO6	NM_001368865.1		c.238C>T	p.Arg80*	stop_gained	Exon 4 of 36	NP_001355794.1	A0A590UJ40
MYO6	NM_001368866.1		c.238C>T	p.Arg80*	stop_gained	Exon 4 of 35	NP_001355795.1	A0A1Y0BRN3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MYO6	ENST00000369977.8	TSL:1 MANE Select	c.238C>T	p.Arg80*	stop_gained	Exon 4 of 35	ENSP00000358994.3	Q9UM54-1
MYO6	ENST00000615563.4	TSL:1	c.238C>T	p.Arg80*	stop_gained	Exon 3 of 32	ENSP00000478013.1	Q9UM54-2
MYO6	ENST00000664640.1		c.238C>T	p.Arg80*	stop_gained	Exon 4 of 36	ENSP00000499278.1	A0A590UJ40

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151930

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:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000399

AC:

AN:

250810

AF XY:

0.00000737

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:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000140

AC:

AN:

1429714

Hom.:

Cov.:

AF XY:

0.00000140

AC XY:

AN XY:

713240

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

32740

American (AMR)

AF:

0.00

AC:

AN:

44640

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25862

East Asian (EAS)

AF:

0.00

AC:

AN:

39368

South Asian (SAS)

AF:

0.00

AC:

AN:

85498

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53368

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5690

European-Non Finnish (NFE)

AF:

0.00000185

AC:

AN:

1083270

Other (OTH)

AF:

0.00

AC:

AN:

59278

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00233887), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.350

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:

0.00000658

AC:

AN:

151930

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74180

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41366

American (AMR)

AF:

0.00

AC:

AN:

15246

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10548

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67980

Other (OTH)

AF:

0.00

AC:

AN:

2082

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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:

0.0000214

Hom.:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

ClinVar submissions as Germline

Significance:Pathogenic

Revision:reviewed by expert panel

View on ClinVar

Pathogenic

VUS

Benign

Condition

Autosomal dominant nonsyndromic hearing loss 22 (1)

Monogenic hearing loss (1)

Nonsyndromic genetic hearing loss (1)

not provided (1)

not specified (1)

Rare genetic deafness (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.63

BayesDel_noAF

Pathogenic

0.65

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.75

FATHMM_MKL

Uncertain

0.96

PhyloP100

4.5

Vest4

0.89

GERP RS

5.5

Mutation Taster

=0/200

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over