chr11-77205476-G-C

Variant names:

• chr11-77205476-G-C
• rs372768607
• NM_000260.4:c.5495G>C

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM5 PP3_Strong

The NM_000260.4(MYO7A):​c.5495G>C​(p.Arg1832Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000421 in 1,425,738 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1832W) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000042 (0 hom.)
• Consequence: MYO7A NM_000260.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.47
• 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, 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 8 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
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr11-77205475-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 197405.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.966

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYO7A	NM_000260.4	c.5495G>C	p.Arg1832Pro	missense_variant	Exon 40 of 49	ENST00000409709.9	NP_000251.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO7A	ENST00000409709.9	c.5495G>C	p.Arg1832Pro	missense_variant	Exon 40 of 49	1	NM_000260.4	ENSP00000386331.3
MYO7A	ENST00000458637.6	c.5381G>C	p.Arg1794Pro	missense_variant	Exon 40 of 49	1		ENSP00000392185.2
MYO7A	ENST00000409619.6	c.5348G>C	p.Arg1783Pro	missense_variant	Exon 41 of 50	1		ENSP00000386635.2
MYO7A	ENST00000458169.2	c.2921G>C	p.Arg974Pro	missense_variant	Exon 20 of 29	1		ENSP00000417017.2
MYO7A	ENST00000670577.1	n.*93G>C		non_coding_transcript_exon_variant	Exon 23 of 32			ENSP00000499323.1
MYO7A	ENST00000670577.1	n.*93G>C		3_prime_UTR_variant	Exon 23 of 32			ENSP00000499323.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000421 AC: 6 AN: 1425738 Hom.: 0 Cov.: 32 AF XY: 0.00000425 AC XY: 3 AN XY: 705910

African (AFR) AF: 0.00 AC: 0 AN: 32460

American (AMR) AF: 0.00 AC: 0 AN: 39454

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25472

East Asian (EAS) AF: 0.00 AC: 0 AN: 37340

South Asian (SAS) AF: 0.00 AC: 0 AN: 81142

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50516

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5724

European-Non Finnish (NFE) AF: 0.00000548 AC: 6 AN: 1094600

Other (OTH) AF: 0.00 AC: 0 AN: 59030

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	D;.;.;D
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Pathogenic	0.98	D;D;D;D
M_CAP	Pathogenic	0.68	D
MetaRNN	Pathogenic	0.97	D;D;D;D
MetaSVM	Pathogenic	0.81	D
MutationAssessor	Pathogenic	3.4	M;.;.;.
PhyloP100		3.5
PrimateAI	Uncertain	0.66	T
PROVEAN	Pathogenic	-5.9	D;D;D;D
REVEL	Pathogenic	0.88
Sift	Uncertain	0.0010	D;D;D;D
Sift4G	Uncertain	0.0030	D;D;D;D
Polyphen		0.99	D;.;.;.
Vest4		0.83
MutPred		0.85		Gain of glycosylation at R1832 (P = 0.0651);.;.;.;
MVP		0.98
MPC		0.35
ClinPred		1.0	D
GERP RS		3.0
Varity_R		0.96
gMVP		0.87
Mutation Taster		=54/46	polymorphism

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: rs372768607; hg19: chr11-76916521;