6-75840678-A-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_004999.4(MYO6):c.647A>T(p.Glu216Val) variant causes a missense change. The variant allele was found at a frequency of 0.000191 in 1,606,212 control chromosomes in the GnomAD database, including 2 homozygotes. 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 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00019 ( 2 hom. )

Consequence

MYO6
NM_004999.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 5.96

Publications

10 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: Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia
nonsyndromic genetic hearing loss
Inheritance: AD, AR Classification: DEFINITIVE, MODERATE Submitted by: ClinGen, G2P
autosomal recessive nonsyndromic hearing loss 37
Inheritance: AR Classification: STRONG, MODERATE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics
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: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.01628673).

BP6

Variant 6-75840678-A-T is Benign according to our data. Variant chr6-75840678-A-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 8580.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000197 (30/152324) while in subpopulation SAS AF = 0.00601 (29/4826). AF 95% confidence interval is 0.0043. There are 0 homozygotes in GnomAd4. There are 24 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYO6	NM_004999.4 link	c.647A>T	p.Glu216Val	missense_variant	Exon 8 of 35	ENST00000369977.8	NP_004990.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO6	ENST00000369977.8 link	c.647A>T	p.Glu216Val	missense_variant	Exon 8 of 35	1	NM_004999.4	ENSP00000358994.3

Frequencies

GnomAD3 genomes

AF:

0.000197

AC:

AN:

152206

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:

0.00600

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000319

AC:

AN:

250648

AF XY:

0.000443

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:

0.00000883

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000190

AC:

276

AN:

1453888

Hom.:

Cov.:

AF XY:

0.000264

AC XY:

191

AN XY:

723908

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33310

American (AMR)

AF:

0.00

AC:

AN:

44700

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26092

East Asian (EAS)

AF:

0.00

AC:

AN:

39626

South Asian (SAS)

AF:

0.00306

AC:

263

AN:

86050

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53378

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.00000362

AC:

AN:

1104848

Other (OTH)

AF:

0.000133

AC:

AN:

60134

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

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:

0.000197

AC:

AN:

152324

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41564

American (AMR)

AF:

0.00

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00601

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

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:

0.000200

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.000428

AC:

Asia WGS

AF:

0.00173

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

Oct 10, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 26, 2022

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Glu216Val variant in MYO6 has been reported in homozygous state in one Pakistani individual with severe-to-profound hearing loss and was not identified in 540 ethnically matched chromosomes (Ahmed 2003). Although this information suggests a role for this variant, it is possible that the variant segregates with another variant that is causative for the hearing loss. Additional evidence, such as screening for this variant in a large ethnically-matched control population and functional studies, is needed to assume pathogenicity. Computational prediction tools and conservation analysis do not provide strong support for or against an impact to the protein. In summary, the clinical significance of the Glu216Val variant is uncertain. -

Aug 05, 2024

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Observed in homozygous state in a patient with congenital sensorineural hearing loss in the literature, however, this individual was not screened for variants in other genes associated with hearing loss (PMID: 12687499), and this variant was observed as homozygous in at least one individual in the general population (gnomAD); Published functional studies are inconclusive regarding the functional impact of this variant (PMID: 32143290); 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: 31250571, 29224747, 30245029, 32143290, 39019031, 12687499) -

Autosomal recessive nonsyndromic hearing loss 37

Pathogenic:1

May 01, 2003

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Autosomal dominant nonsyndromic hearing loss 22

Uncertain:1

May 28, 2019

Mendelics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.33

BayesDel_addAF

Benign

-0.044

BayesDel_noAF

Pathogenic

0.16

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.64

D;.;.;.;T;T

Eigen

Benign

0.076

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.88

D;.;D;D;D;D

MetaRNN

Benign

0.016

T;T;T;T;T;T

MetaSVM

Benign

-0.40

MutationAssessor

Benign

1.3

.;L;L;L;.;.

PhyloP100

6.0

PrimateAI

Uncertain

0.76

PROVEAN

Uncertain

-3.2

D;D;D;.;D;.

REVEL

Pathogenic

0.73

Sift

Benign

0.12

T;T;T;.;T;.

Sift4G

Benign

0.16

T;T;T;T;T;T

Polyphen

0.11, 0.64

.;B;P;B;.;.

Vest4

0.82

MutPred

0.79

Loss of disorder (P = 0.0267);Loss of disorder (P = 0.0267);Loss of disorder (P = 0.0267);Loss of disorder (P = 0.0267);Loss of disorder (P = 0.0267);Loss of disorder (P = 0.0267);

MVP

0.86

MPC

0.30

ClinPred

0.15

GERP RS

5.2

gMVP

0.58

Mutation Taster

=27/73

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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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