chr6-75828569-C-G

Variant names:

• chr6-75828569-C-G
• rs759372006
• NM_004999.4:c.217C>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 0P and 0B.

The NM_004999.4(MYO6):​c.217C>G​(p.Leu73Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000489 in 1,430,084 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000049 (0 hom.)
• Consequence: MYO6 NM_004999.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 3.68

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYO6	NM_004999.4	c.217C>G	p.Leu73Val	missense_variant	Exon 4 of 35	ENST00000369977.8	NP_004990.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO6	ENST00000369977.8	c.217C>G	p.Leu73Val	missense_variant	Exon 4 of 35	1	NM_004999.4	ENSP00000358994.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000199 AC: 5 AN: 250788 Hom.: 0 AF XY: 0.0000369 AC XY: 5 AN XY: 135594

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000272

Gnomad SAS 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: 0.00000489 AC: 7 AN: 1430084 Hom.: 0 Cov.: 27 AF XY: 0.00000841 AC XY: 6 AN XY: 713434

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000178

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Apr 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.Leu73Val variant in MYO6 has not been previously reported in individuals w ith hearing loss, but has been identified in 5/17242 East Asian chromosomes by t he Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs759372006). Although this variant has been seen in the general population, its frequency is not high enough to rule out a pathogenic role. Computational predi ction tools and conservation analyses do not provide strong support for or again st an impact to the protein. In summary, the clinical significance of the p.Leu7 3Val variant is uncertain. -

not provided Uncertain:1

Oct 11, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MYO6 protein function. ClinVar contains an entry for this variant (Variation ID: 505686). This variant has not been reported in the literature in individuals affected with MYO6-related conditions. This variant is present in population databases (rs759372006, gnomAD 0.03%). This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 73 of the MYO6 protein (p.Leu73Val). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	0.0015	T
BayesDel_noAF	Uncertain	0.060
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.66	D;.;.;.;T;T
Eigen	Uncertain	0.21
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.95	D;.;D;D;D;D
M_CAP	Benign	0.041	D
MetaRNN	Uncertain	0.65	D;D;D;D;D;D
MetaSVM	Benign	-0.80	T
MutationAssessor	Benign	1.2	.;L;L;L;.;.
PrimateAI	Pathogenic	0.82	D
PROVEAN	Uncertain	-2.8	D;D;D;.;D;.
REVEL	Uncertain	0.38
Sift	Uncertain	0.0030	D;D;D;.;D;.
Sift4G	Benign	0.21	T;T;T;T;T;T
Polyphen		1.0, 0.92	.;D;P;D;.;.
Vest4		0.78
MutPred		0.56		Gain of methylation at K78 (P = 0.0748);Gain of methylation at K78 (P = 0.0748);Gain of methylation at K78 (P = 0.0748);Gain of methylation at K78 (P = 0.0748);Gain of methylation at K78 (P = 0.0748);Gain of methylation at K78 (P = 0.0748);
MVP		0.65
MPC		0.26
ClinPred		0.53	D
GERP RS		4.6
gMVP		0.51

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

LitVar

Other links and lift over

dbSNP: rs759372006; hg19: chr6-76538286;