11-77194346-C-G

Variant names:

• chr11-77194346-C-G
• rs143216377
• NM_000260.4:c.4153-8C>G

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS1

The NM_000260.4(MYO7A):​c.4153-8C>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0001 in 1,609,776 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). The gene MYO7A is included in the ClinGen Criteria Specification Registry.

• Frequency:
  • Genomes: 𝑓 0.00058 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000050 (0 hom.)
• Consequence: MYO7A NM_000260.4 splice_region, intron
• Scores: Splicing: ADA: 0.001538
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:2
• Conservation: PhyloP100: 0.697
• 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: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.77).
• BP6: Variant 11-77194346-C-G is Benign according to our data. Variant chr11-77194346-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 179432.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000578 (88/152294) while in subpopulation AFR AF = 0.00207 (86/41574). AF 95% confidence interval is 0.00172. There are 0 homozygotes in GnomAd4. There are 41 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

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.4153-8C>G		splice_region intron	N/A	NP_000251.3	Q13402-1
	MYO7A	NM_001127180.2		c.4153-8C>G		splice_region intron	N/A	NP_001120652.1	Q13402-2
	MYO7A	NM_001369365.1		c.4120-8C>G		splice_region intron	N/A	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.4153-8C>G		splice_region intron	N/A	ENSP00000386331.3	Q13402-1
	MYO7A	ENST00000458637.6	TSL:1	c.4153-8C>G		splice_region intron	N/A	ENSP00000392185.2	Q13402-2
	MYO7A	ENST00000409619.6	TSL:1	c.4120-8C>G		splice_region intron	N/A	ENSP00000386635.2	Q13402-8

Frequencies

GnomAD3 genomes AF: 0.000578 AC: 88 AN: 152176 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00207

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000116 AC: 28 AN: 241786 AF XY: 0.000114

Gnomad AFR exome AF: 0.00171

Gnomad AMR exome AF: 0.0000590

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000501 AC: 73 AN: 1457482 Hom.: 0 Cov.: 30 AF XY: 0.0000469 AC XY: 34 AN XY: 724530

African (AFR) AF: 0.00168 AC: 56 AN: 33398

American (AMR) AF: 0.0000678 AC: 3 AN: 44260

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25970

East Asian (EAS) AF: 0.00 AC: 0 AN: 39562

South Asian (SAS) AF: 0.0000235 AC: 2 AN: 85168

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53004

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5752

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1110164

Other (OTH) AF: 0.000133 AC: 8 AN: 60204

GnomAD4 genome AF: 0.000578 AC: 88 AN: 152294 Hom.: 0 Cov.: 33 AF XY: 0.000551 AC XY: 41 AN XY: 74474

African (AFR) AF: 0.00207 AC: 86 AN: 41574

American (AMR) AF: 0.000131 AC: 2 AN: 15308

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67982

Other (OTH) AF: 0.00 AC: 0 AN: 2116

Alfa AF: 0.0000224 Hom.: 0

Bravo AF: 0.000676

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	not provided (2)
-	-	1	not specified (1)
-	1	-	Usher syndrome type 1;C1838701:Autosomal recessive nonsyndromic hearing loss 2 (1)
-	1	-	Usher syndrome type 1B (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.77
CADD	Benign	0.87
DANN	Benign	0.64
PhyloP100		0.70

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0015
dbscSNV1_RF	Benign	0.070
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: rs143216377; hg19: chr11-76905391;