rs876657530

Positions:

• chr10-26174352-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Moderate BP6_Moderate

The NM_017433.5(MYO3A):​c.4088G>A​(p.Arg1363Lys) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,890 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MYO3A NM_017433.5 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 3.64

Genes affected

MYO3A (HGNC:7601): (myosin IIIA) The protein encoded by this gene belongs to the myosin superfamily. Myosins are actin-dependent motor proteins and are categorized into conventional myosins (class II) and unconventional myosins (classes I and III through XV) based on their variable C-terminal cargo-binding domains. Class III myosins, such as this one, have a kinase domain N-terminal to the conserved N-terminal motor domains and are expressed in photoreceptors. The protein encoded by this gene plays an important role in hearing in humans. Three different recessive, loss of function mutations in the encoded protein have been shown to cause nonsyndromic progressive hearing loss. Expression of this gene is highly restricted, with the strongest expression in retina and cochlea. [provided by RefSeq, Jul 2008]

MYO3A (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12426025).
• BP6: Variant 10-26174352-G-A is Benign according to our data. Variant chr10-26174352-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 227669.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYO3A	NM_017433.5	c.4088G>A	p.Arg1363Lys	missense_variant	30/35	ENST00000642920.2	NP_059129.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYO3A	ENST00000642920.2	c.4088G>A	p.Arg1363Lys	missense_variant	30/35		NM_017433.5	ENSP00000495965.1
MYO3A	ENST00000543632.5	c.1777-37491G>A		intron_variant		1		ENSP00000445909.1
MYO3A	ENST00000647478.1	n.*1393+3813G>A		intron_variant				ENSP00000493932.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461890 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 727246

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Nov 12, 2015

p.Arg1363Lys in exon 13 of MYO3A: This variant is not expected to have clinical significance due to a lack of conservation across species, including mammals. Of note, five mammals have a Lysine (K) at this position. In addition, computation al prediction tools do not suggest a high likelihood of impact to the protein. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Benign	-0.098	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	18
DANN	Uncertain	0.98
DEOGEN2	Benign	0.037	T;T
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.18
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.56	.;T
M_CAP	Benign	0.030	D
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-0.79	T
MutationAssessor	Benign	1.9	L;L
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-1.1	.;N
REVEL	Benign	0.20
Sift	Benign	0.12	.;T
Sift4G	Benign	0.44	.;T
Polyphen		0.067	B;B
Vest4		0.15
MutPred		0.21		Gain of methylation at R1363 (P = 0.0483);Gain of methylation at R1363 (P = 0.0483);
MVP		0.81
MPC		0.069
ClinPred		0.52	D
GERP RS		2.9
Varity_R		0.12
gMVP		0.23

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: rs876657530; hg19: chr10-26463281;