rs782465732

Positions:

• chr11-77184663-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP3_Moderate

The NM_000260.4(MYO7A):​c.3451C>G​(p.Leu1151Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000118 in 1,442,406 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: MYO7A NM_000260.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 2.21

Genes affected

MYO7A (HGNC:7606): (myosin VIIA) This gene is a member of the myosin gene family. Myosins are mechanochemical proteins characterized by the presence of a motor domain, an actin-binding domain, a neck domain that interacts with other proteins, and a tail domain that serves as an anchor. This gene encodes an unconventional myosin with a very short tail. Defects in this gene are associated with the mouse shaker-1 phenotype and the human Usher syndrome 1B which are characterized by deafness, reduced vestibular function, and (in human) retinal degeneration. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2008]

MYO7A (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a domain MyTH4 1 (size 236) in uniprot entity MYO7A_HUMAN there are 26 pathogenic changes around while only 4 benign (87%) in NM_000260.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.845

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYO7A	NM_000260.4	c.3451C>G	p.Leu1151Val	missense_variant	27/49	ENST00000409709.9	NP_000251.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYO7A	ENST00000409709.9	c.3451C>G	p.Leu1151Val	missense_variant	27/49	1	NM_000260.4	ENSP00000386331.3
MYO7A	ENST00000458637.6	c.3451C>G	p.Leu1151Val	missense_variant	27/49	1		ENSP00000392185.2
MYO7A	ENST00000409619.6	c.3418C>G	p.Leu1140Val	missense_variant	28/50	1		ENSP00000386635.2
MYO7A	ENST00000458169.2	c.994C>G	p.Leu332Val	missense_variant	7/29	1		ENSP00000417017.2
MYO7A	ENST00000670577.1	n.1291C>G		non_coding_transcript_exon_variant	10/32			ENSP00000499323.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000183 AC: 4 AN: 218150 Hom.: 0 AF XY: 0.0000170 AC XY: 2 AN XY: 117952

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000415

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000118 AC: 17 AN: 1442406 Hom.: 0 Cov.: 31 AF XY: 0.0000168 AC XY: 12 AN XY: 715568

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000154

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ExAC AF: 0.00000829 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Mar 29, 2016

Variant classified as Uncertain Significance - Favor Benign. The p.Leu1151Val va riant in MYO7A has been reported in trans with a likely pathogenic variant in on e individual with hearing loss and one unaffected sibling. This variant has been identified in 1/24050 European chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org). Although this variant has been seen in t he general population, its frequency is not high enough to rule out a pathogenic role. Computational prediction tools and conservation analyses suggest that the p.Leu1151Val variant may impact the protein, though this information is not pre dictive enough to determine pathogenicity. While the clinical significance of th e p.Leu1151Val variant is uncertain, it is likely to be benign because it is lik ely in trans with a likely pathogenic variant in MYO7 in a reportedly unaffected individual. -

Usher syndrome type 1;C1838701:Autosomal recessive nonsyndromic hearing loss 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Mar 21, 2017

- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 19, 2023

This variant has not been reported in the literature in individuals affected with MYO7A-related conditions. 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 expected to disrupt MYO7A protein function. ClinVar contains an entry for this variant (Variation ID: 229011). This variant is present in population databases (rs782465732, gnomAD 0.002%). This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1151 of the MYO7A protein (p.Leu1151Val). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.74
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	0.0
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.65	D;T;.;.;.;T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.32
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Pathogenic	0.98	D;D;D;D;D;D
M_CAP	Pathogenic	0.51	D
MetaRNN	Pathogenic	0.85	D;D;D;D;D;D
MetaSVM	Uncertain	0.74	D
MutationAssessor	Uncertain	2.4	M;.;M;.;.;.
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-2.9	D;.;D;D;.;D
REVEL	Pathogenic	0.75
Sift	Pathogenic	0.0	D;.;D;D;.;D
Sift4G	Uncertain	0.0040	D;D;D;D;.;D
Polyphen		1.0	D;.;.;.;.;.
Vest4		0.64
MVP		0.91
MPC		0.47
ClinPred		0.97	D
GERP RS		1.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.76
gMVP		0.54

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: rs782465732; hg19: chr11-76895708;