12-57029165-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_005379.4(MYO1A):c.2972C>T(p.Thr991Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000508 in 1,613,932 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

MYO1A
NM_005379.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.20

Variant links:

Genes affected

MYO1A (HGNC:7595): (myosin IA) This gene encodes a member of the myosin superfamily. The protein represents an unconventional myosin; it should not be confused with the conventional skeletal muscle myosin-1 (MYH1). Unconventional myosins contain the basic domains characteristic of conventional myosins and are further distinguished from class members by their tail domains. They function as actin-based molecular motors. Mutations in this gene have been associated with autosomal dominant deafness. Alternatively spliced variants have been found for this gene. [provided by RefSeq, Dec 2011]

MYO1A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.122609526).

BS2

High AC in GnomAd at 18 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
MYO1A	NM_005379.4 linkuse as main transcript	c.2972C>T	p.Thr991Met	missense_variant	27/28	ENST00000300119.8
MYO1A	NM_001256041.2 linkuse as main transcript	c.2972C>T	p.Thr991Met	missense_variant	28/29
MYO1A	XM_047428876.1 linkuse as main transcript	c.2972C>T	p.Thr991Met	missense_variant	28/29

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
MYO1A	ENST00000300119.8 linkuse as main transcript	c.2972C>T	p.Thr991Met	missense_variant	27/28	1	NM_005379.4	P1
MYO1A	ENST00000442789.6 linkuse as main transcript	c.2972C>T	p.Thr991Met	missense_variant	28/29	1		P1
MYO1A	ENST00000554234.5 linkuse as main transcript	c.*417C>T		3_prime_UTR_variant, NMD_transcript_variant	23/24	5

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152040

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000266

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000385

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000796

AC:

AN:

251172

Hom.:

AF XY:

0.0000958

AC XY:

AN XY:

135732

show subpopulations

Gnomad AFR exome

AF:

0.000431

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000435

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000441

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000438

AC:

AN:

1461892

Hom.:

Cov.:

AF XY:

0.0000468

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.000239

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000327

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000324

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.000118

AC:

AN:

152040

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74262

show subpopulations

Gnomad4 AFR

AF:

0.000266

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000385

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.000166

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000824

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 14, 2021

The c.2972C>T (p.T991M) alteration is located in exon 27 (coding exon 26) of the MYO1A gene. This alteration results from a C to T substitution at nucleotide position 2972, causing the threonine (T) at amino acid position 991 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.53

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.26

T;T

Eigen

Benign

-0.075

Eigen_PC

Benign

-0.084

FATHMM_MKL

Benign

0.63

M_CAP

Benign

0.018

MetaRNN

Benign

0.12

T;T

MetaSVM

Benign

-0.92

MutationAssessor

Uncertain

2.3

M;M

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.43

PROVEAN

Benign

-2.3

N;N

REVEL

Benign

0.14

Sift

Uncertain

0.0020

D;D

Sift4G

Uncertain

0.035

D;D

Polyphen

0.32

B;B

Vest4

0.18

MVP

0.63

MPC

0.16

ClinPred

0.079

GERP RS

1.8

Varity_R

0.093

gMVP

0.44

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over