chr11-77205475-C-T

Variant names:

• chr11-77205475-C-T
• rs748080151
• NM_000260.4:c.5494C>T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM1 PP3_Strong PP5

The NM_000260.4(MYO7A):​c.5494C>T​(p.Arg1832Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000102 in 1,575,956 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1832Q) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: MYO7A NM_000260.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:5
• Conservation: PhyloP100: 2.17
• Publications: 2 publications found

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 Gene-Disease associations (from GenCC):

• nonsyndromic genetic hearing loss

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• autosomal recessive nonsyndromic hearing loss 2

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, Ambry Genetics, G2P
• Usher syndrome type 1

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet, PanelApp Australia
• Usher syndrome type 1B

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• autosomal dominant nonsyndromic hearing loss 11

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae)
• autosomal dominant nonsyndromic hearing loss

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Usher syndrome type 2

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_000260.4
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.949
• PP5: Variant 11-77205475-C-T is Pathogenic according to our data. Variant chr11-77205475-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 197405.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000260.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYO7A	NM_000260.4	MANE Select	c.5494C>T	p.Arg1832Trp	missense	Exon 40 of 49	NP_000251.3
	MYO7A	NM_001127180.2		c.5380C>T	p.Arg1794Trp	missense	Exon 40 of 49	NP_001120652.1
	MYO7A	NM_001369365.1		c.5347C>T	p.Arg1783Trp	missense	Exon 41 of 50	NP_001356294.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYO7A	ENST00000409709.9	TSL:1 MANE Select	c.5494C>T	p.Arg1832Trp	missense	Exon 40 of 49	ENSP00000386331.3
	MYO7A	ENST00000458637.6	TSL:1	c.5380C>T	p.Arg1794Trp	missense	Exon 40 of 49	ENSP00000392185.2
	MYO7A	ENST00000409619.6	TSL:1	c.5347C>T	p.Arg1783Trp	missense	Exon 41 of 50	ENSP00000386635.2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152180 Hom.: 0 Cov.: 33

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: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000211 AC: 4 AN: 189926 AF XY: 0.00

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: 0.0000567

Gnomad NFE exome AF: 0.0000367

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000105 AC: 15 AN: 1423776 Hom.: 0 Cov.: 32 AF XY: 0.00000709 AC XY: 5 AN XY: 704770

African (AFR) AF: 0.00 AC: 0 AN: 32436

American (AMR) AF: 0.00 AC: 0 AN: 39170

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25420

East Asian (EAS) AF: 0.00 AC: 0 AN: 37254

South Asian (SAS) AF: 0.00 AC: 0 AN: 80946

European-Finnish (FIN) AF: 0.0000198 AC: 1 AN: 50390

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5720

European-Non Finnish (NFE) AF: 0.0000119 AC: 13 AN: 1093472

Other (OTH) AF: 0.0000170 AC: 1 AN: 58968

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152180 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74338

African (AFR) AF: 0.00 AC: 0 AN: 41450

American (AMR) AF: 0.00 AC: 0 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68016

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000835 AC: 1

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:5

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Pathogenic:1 Uncertain:1

Aug 23, 2022

Clinical Genetics Laboratory, Skane University Hospital Lund

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Jan 20, 2015

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

not specified Uncertain:1

Feb 20, 2015

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Arg1832Trp variant in MYO7A has not been previously reported in individual s with hearing loss but has been identified in 1/12192 of European chromosomes b y the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org). Altho ugh this variant has been seen in the general population, its frequency is not h igh enough to rule out a pathogenic role. Computational prediction tools and con servation analyses suggest that the p.Arg1832Trp variant may impact the protein, though this information is not predictive enough to determine pathogenicity. In summary, the clinical significance of the p.Arg1832Trp variant is uncertain.

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

Jun 21, 2017

Counsyl

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

Inborn genetic diseases Uncertain:1

Feb 07, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.5494C>T (p.R1832W) alteration is located in exon 40 (coding exon 39) of the MYO7A gene. This alteration results from a C to T substitution at nucleotide position 5494, causing the arginine (R) at amino acid position 1832 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

Usher syndrome type 1B Uncertain:1

Feb 14, 2020

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.75
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	0.030
CADD	Pathogenic	31
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.90	D
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.50	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Pathogenic	0.94	D
MutationAssessor	Pathogenic	3.4	M
PhyloP100		2.2
PrimateAI	Uncertain	0.69	T
PROVEAN	Pathogenic	-7.0	D
REVEL	Pathogenic	0.82
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.72
MutPred		0.83		Loss of disorder (P = 0.0374)
MVP		0.98
MPC		0.42
ClinPred		0.99	D
GERP RS		2.8
Varity_R		0.90
gMVP		0.75
Mutation Taster		=58/42	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.13		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: rs748080151; hg19: chr11-76916520;