chr6-75891271-A-G

Variant names:

• chr6-75891271-A-G
• rs397517049
• NM_004999.4:c.2911A>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_004999.4(MYO6):​c.2911A>G​(p.Arg971Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,457,424 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: MYO6 NM_004999.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.41
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2995937).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYO6	NM_004999.4	c.2911A>G	p.Arg971Gly	missense_variant	Exon 27 of 35	ENST00000369977.8	NP_004990.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO6	ENST00000369977.8	c.2911A>G	p.Arg971Gly	missense_variant	Exon 27 of 35	1	NM_004999.4	ENSP00000358994.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1457424 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 725056

African (AFR) AF: 0.00 AC: 0 AN: 33350

American (AMR) AF: 0.00 AC: 0 AN: 44536

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25998

East Asian (EAS) AF: 0.00 AC: 0 AN: 39500

South Asian (SAS) AF: 0.00 AC: 0 AN: 86036

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52884

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5748

European-Non Finnish (NFE) AF: 9.02e-7 AC: 1 AN: 1109242

Other (OTH) AF: 0.00 AC: 0 AN: 60130

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Nov 15, 2011

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Benign. The Arg971Gly varia nt in MYO6 has not been reported in the literature nor previously identified by our laboratory. This residue is conserved across species and computational analy ses (biochemical amino acid properties, PolyPhen2, SIFT) suggest that the Arg971 Gly variant may impact the protein. However, this information is not predictive enough to assume pathogenicity. In summary, the clinical significance of this va riant cannot be determined with certainty at this time. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	0.00099	T
BayesDel_noAF	Benign	-0.24
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.46	T;.;.;.;T;T;.
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.95	D;.;D;D;D;D;D
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.30	T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.6	.;M;M;M;.;.;.
PhyloP100		3.4
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-4.1	D;D;D;.;D;.;D
REVEL	Benign	0.12
Sift	Uncertain	0.010	D;D;D;.;D;.;D
Sift4G	Uncertain	0.032	D;D;D;D;T;D;D
Polyphen		0.98	.;D;D;D;.;.;.
Vest4		0.62
MutPred		0.21		Loss of helix (P = 0.0093);Loss of helix (P = 0.0093);Loss of helix (P = 0.0093);Loss of helix (P = 0.0093);Loss of helix (P = 0.0093);Loss of helix (P = 0.0093);.;
MVP		0.58
MPC		0.65
ClinPred		0.99	D
GERP RS		5.2
gMVP		0.58
Mutation Taster		=41/59	disease causing

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

Other links and lift over

dbSNP: rs397517049; hg19: chr6-76600988;