11-77199705-A-G
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Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong
The NM_000260.4(MYO7A):āc.4739A>Gā(p.Tyr1580Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000265 in 1,613,572 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 (ā ā ).
Frequency
Genomes: š 0.00017 ( 0 hom., cov: 33)
Exomes š: 0.00028 ( 0 hom. )
Consequence
MYO7A
NM_000260.4 missense
NM_000260.4 missense
Scores
16
2
1
Clinical Significance
Conservation
PhyloP100: 5.45
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]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PP3
MetaRNN computational evidence supports a deleterious effect, 0.955
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
|---|---|---|---|---|---|---|---|
| MYO7A | NM_000260.4 | c.4739A>G | p.Tyr1580Cys | missense_variant | 35/49 | ENST00000409709.9 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| MYO7A | ENST00000409709.9 | c.4739A>G | p.Tyr1580Cys | missense_variant | 35/49 | 1 | NM_000260.4 |
Frequencies
GnomAD3 genomes 0.000171 AC: 26AN: 152182Hom.: 0 Cov.: 33
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GnomAD3 exomes AF: 0.000161 AC: 40AN: 248348Hom.: 0 AF XY: 0.000148 AC XY: 20AN XY: 134816
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GnomAD4 exome AF: 0.000275 AC: 402AN: 1461390Hom.: 0 Cov.: 30 AF XY: 0.000276 AC XY: 201AN XY: 726964
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GnomAD4 genome 0.000171 AC: 26AN: 152182Hom.: 0 Cov.: 33 AF XY: 0.000161 AC XY: 12AN XY: 74344
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:11
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not provided Uncertain:5
| Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Mar 02, 2023 | 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: 31260034) - |
| Uncertain significance, no assertion criteria provided | clinical testing | Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+ | - | - - |
| Uncertain significance, no assertion criteria provided | clinical testing | Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center | - | - - |
| Uncertain significance, no assertion criteria provided | clinical testing | Clinical Genetics, Academic Medical Center | - | - - |
| Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 03, 2022 | This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 1580 of the MYO7A protein (p.Tyr1580Cys). This variant is present in population databases (rs370232066, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with MYO7A-related conditions. ClinVar contains an entry for this variant (Variation ID: 43256). 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. 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. - |
not specified Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Sep 29, 2010 | Variant classified as Uncertain Significance - Favor Benign. The Tyr1580Cys vari ant in MYO7A has not been reported in the literature nor previously identified b y our laboratory. The Tyrosine (Tyr) residue at position 1580 is conserved acros s mammals and some lower species and computational analyses (PolyPhen, SIFT, Ali gnGVGD) suggest that the Tyr1580Cys variant may impact the protein. However, thi s information is not predictive enough to assume pathogenicity. It should be not ed that this lab has only sequenced the MYO7A in approximately 200 individuals s uch that the full spectrum of benign variation has not yet been defined for this gene, increasing the possibility that this could be a benign variant. In summar y, the clinical significance of this variant cannot be determined with certainty at this time. - |
Autosomal dominant nonsyndromic hearing loss 11 Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Autosomal recessive nonsyndromic hearing loss 2 Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Usher syndrome type 1B Uncertain:1
| Uncertain significance, no assertion criteria provided | clinical testing | Natera, Inc. | Apr 17, 2020 | - - |
Usher syndrome type 1 Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Hearing impairment Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Department of Otolaryngology ā Head & Neck Surgery, Cochlear Implant Center | Apr 12, 2021 | PM5_Moderate, PP3_Supporting - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
DEOGEN2
Pathogenic
D;.;.;D
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Pathogenic
D;D;D;D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D;D;D;D
MetaSVM
Pathogenic
D
MutationAssessor
Pathogenic
M;.;.;.
MutationTaster
Benign
D;D;D
PrimateAI
Pathogenic
D
PROVEAN
Pathogenic
D;D;D;D
REVEL
Pathogenic
Sift
Pathogenic
D;D;D;D
Sift4G
Uncertain
D;D;D;D
Polyphen
D;.;.;.
Vest4
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at