11-77142783-C-G

Variant names:

• chr11-77142783-C-G
• rs35689081
• NM_000260.4:c.93C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM1 PP3

The NM_000260.4(MYO7A):​c.93C>G​(p.Cys31Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000754 in 1,458,584 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. C31C) has been classified as Likely benign. The gene MYO7A is included in the ClinGen Criteria Specification Registry.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: MYO7A NM_000260.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.730
• Publications: 0 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 Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• Usher syndrome type 1

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

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

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• 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

Specifications for MYO7A are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 8 uncertain in NM_000260.4
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.8

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYO7A	NM_000260.4	MANE Select	c.93C>G	p.Cys31Trp	missense	Exon 3 of 49	NP_000251.3	Q13402-1
	MYO7A	NM_001127180.2		c.93C>G	p.Cys31Trp	missense	Exon 3 of 49	NP_001120652.1	Q13402-2
	MYO7A	NM_001369365.1		c.60C>G	p.Cys20Trp	missense	Exon 4 of 50	NP_001356294.1	Q13402-8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYO7A	ENST00000409709.9	TSL:1 MANE Select	c.93C>G	p.Cys31Trp	missense	Exon 3 of 49	ENSP00000386331.3	Q13402-1
	MYO7A	ENST00000458637.6	TSL:1	c.93C>G	p.Cys31Trp	missense	Exon 3 of 49	ENSP00000392185.2	Q13402-2
	MYO7A	ENST00000409619.6	TSL:1	c.60C>G	p.Cys20Trp	missense	Exon 4 of 50	ENSP00000386635.2	Q13402-8

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000754 AC: 11 AN: 1458584 Hom.: 0 Cov.: 33 AF XY: 0.00000690 AC XY: 5 AN XY: 725088

African (AFR) AF: 0.00 AC: 0 AN: 33452

American (AMR) AF: 0.00 AC: 0 AN: 44336

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26076

East Asian (EAS) AF: 0.00 AC: 0 AN: 39596

South Asian (SAS) AF: 0.00 AC: 0 AN: 85062

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53232

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000990 AC: 11 AN: 1110786

Other (OTH) AF: 0.00 AC: 0 AN: 60280

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.58
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.23
CADD	Benign	10
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.77	D
Eigen	Benign	-0.67
Eigen_PC	Benign	-0.90
FATHMM_MKL	Benign	0.25	N
LIST_S2	Uncertain	0.95	D
M_CAP	Pathogenic	0.65	D
MetaRNN	Pathogenic	0.80	D
MetaSVM	Uncertain	0.48	D
MutationAssessor	Uncertain	2.4	M
PhyloP100		-0.73
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-5.0	D
REVEL	Uncertain	0.64
Sift	Uncertain	0.0040	D
Sift4G	Uncertain	0.0070	D
Polyphen		1.0	D
Vest4		0.67
MutPred		0.45		Loss of catalytic residue at S33 (P = 0.0473)
MVP		0.79
MPC		0.54
ClinPred		1.0	D
GERP RS		-9.1
Varity_R		0.75
gMVP		0.75
Mutation Taster		=25/75	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs35689081; hg19: chr11-76853829;