chr11-77194559-G-A

Variant names:

• chr11-77194559-G-A
• rs1109977
• NM_000260.4:c.4323+35G>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000260.4(MYO7A):​c.4323+35G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MYO7A NM_000260.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.45
• Publications: 11 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_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYO7A	NM_000260.4	c.4323+35G>A		intron_variant	Intron 32 of 48	ENST00000409709.9	NP_000251.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO7A	ENST00000409709.9	c.4323+35G>A		intron_variant	Intron 32 of 48	1	NM_000260.4	ENSP00000386331.3
MYO7A	ENST00000458637.6	c.4323+35G>A		intron_variant	Intron 32 of 48	1		ENSP00000392185.2
MYO7A	ENST00000409619.6	c.4290+35G>A		intron_variant	Intron 33 of 49	1		ENSP00000386635.2
MYO7A	ENST00000458169.2	c.1866+35G>A		intron_variant	Intron 12 of 28	1		ENSP00000417017.2
MYO7A	ENST00000670577.1	n.2163+35G>A		intron_variant	Intron 15 of 31			ENSP00000499323.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1396692 Hom.: 0 Cov.: 35 AF XY: 0.00 AC XY: 0 AN XY: 688614

African (AFR) AF: 0.00 AC: 0 AN: 31744

American (AMR) AF: 0.00 AC: 0 AN: 36118

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24090

East Asian (EAS) AF: 0.00 AC: 0 AN: 36474

South Asian (SAS) AF: 0.00 AC: 0 AN: 77490

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48642

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5448

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078662

Other (OTH) AF: 0.00 AC: 0 AN: 58024

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.026
DANN	Benign	0.57
PhyloP100		-1.4

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: rs1109977; hg19: chr11-76905604;