rs876657654

Positions:

• chr11-77155935-T-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Moderate PP5_Moderate

The NM_000260.4(MYO7A):​c.314T>G​(p.Val105Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: MYO7A NM_000260.4 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 8.00

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 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.936
• PP5: Variant 11-77155935-T-G is Pathogenic according to our data. Variant chr11-77155935-T-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 228281.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYO7A	NM_000260.4	c.314T>G	p.Val105Gly	missense_variant	5/49	ENST00000409709.9	NP_000251.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYO7A	ENST00000409709.9	c.314T>G	p.Val105Gly	missense_variant	5/49	1	NM_000260.4	ENSP00000386331.3
MYO7A	ENST00000458637.6	c.314T>G	p.Val105Gly	missense_variant	5/49	1		ENSP00000392185.2
MYO7A	ENST00000409619.6	c.281T>G	p.Val94Gly	missense_variant	6/50	1		ENSP00000386635.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Rare genetic deafness Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Aug 20, 2015

The p.Val105Gly variant in MYO7A has not been previously reported in the literat ure and was absent from large population studies. Computational prediction tools and conservation analysis suggest that this variant may impact the protein. The presence of this variant in trans with a likely pathogenic variant in an indivi dual with hearing loss and vision changes and the segregation in an affected sib ling increases the likelihood that the p.Val105Gly variant is pathogenic. In sum mary, although additional studies are required to fully establish its clinical s ignificance, this variant is likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.97	D;D;.;.
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.92	D;D;D;D
M_CAP	Pathogenic	0.70	D
MetaRNN	Pathogenic	0.94	D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	4.3	H;.;H;.
PrimateAI	Uncertain	0.74	T
PROVEAN	Pathogenic	-5.8	D;.;D;D
REVEL	Pathogenic	0.92
Sift	Pathogenic	0.0	D;.;D;D
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.58	P;.;.;.
Vest4		0.61
MutPred		0.79		Loss of stability (P = 0.002);Loss of stability (P = 0.002);Loss of stability (P = 0.002);.;
MVP		0.96
MPC		0.11
ClinPred		1.0	D
GERP RS		4.9
Varity_R		0.97
gMVP		0.95

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs876657654; hg19: chr11-76866981;