rs775908821

Positions:

• chr11-77190090-C-A
• chr11-77190090-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP3_Moderate

The NM_000260.4(MYO7A):​c.3701C>A​(p.Thr1234Asn) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. T1234T) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MYO7A NM_000260.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.81

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.

• PM1: In a domain MyTH4 1 (size 236) in uniprot entity MYO7A_HUMAN there are 26 pathogenic changes around while only 4 benign (87%) in NM_000260.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.864

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYO7A	NM_000260.4	c.3701C>A	p.Thr1234Asn	missense_variant	29/49	ENST00000409709.9	NP_000251.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYO7A	ENST00000409709.9	c.3701C>A	p.Thr1234Asn	missense_variant	29/49	1	NM_000260.4	ENSP00000386331.3
MYO7A	ENST00000458637.6	c.3701C>A	p.Thr1234Asn	missense_variant	29/49	1		ENSP00000392185.2
MYO7A	ENST00000409619.6	c.3668C>A	p.Thr1223Asn	missense_variant	30/50	1		ENSP00000386635.2
MYO7A	ENST00000458169.2	c.1244C>A	p.Thr415Asn	missense_variant	9/29	1		ENSP00000417017.2
MYO7A	ENST00000670577.1	n.1541C>A		non_coding_transcript_exon_variant	12/32			ENSP00000499323.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000513 AC: 1 AN: 194892 Hom.: 0 AF XY: 0.00000951 AC XY: 1 AN XY: 105142

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000709

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1427280 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 706598

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ExAC AF: 0.00000839 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.070
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.86	D;.;.;D
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.73
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D;D
M_CAP	Pathogenic	0.45	D
MetaRNN	Pathogenic	0.86	D;D;D;D
MetaSVM	Uncertain	0.59	D
MutationAssessor	Pathogenic	3.3	M;M;.;.
PrimateAI	Pathogenic	0.83	D
PROVEAN	Pathogenic	-4.7	D;D;D;D
REVEL	Pathogenic	0.74
Sift	Uncertain	0.0010	D;D;D;D
Sift4G	Uncertain	0.0040	D;D;D;D
Polyphen		0.99	D;.;.;.
Vest4		0.93
MutPred		0.70		Loss of phosphorylation at T1234 (P = 0.0525);Loss of phosphorylation at T1234 (P = 0.0525);.;.;
MVP		0.95
MPC		0.34
ClinPred		1.0	D
GERP RS		5.4
Varity_R		0.94
gMVP		0.91

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

Publications

LitVar

Other links and lift over

dbSNP: rs775908821; hg19: chr11-76901135;