12-57243885-G-A

Position:

chr12-57243885-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_145064.3(STAC3):c.1022C>T(p.Ala341Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000026 in 1,613,732 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000024 ( 0 hom. )

Consequence

STAC3
NM_145064.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.00

Variant links:

Genes affected

STAC3 (HGNC:28423): (SH3 and cysteine rich domain 3) The protein encoded by this gene is a component of the excitation-contraction coupling machinery of muscles. This protein is a member of the Stac gene family and contains an N-terminal cysteine-rich domain and two SH3 domains. Mutations in this gene are a cause of Native American myopathy. [provided by RefSeq, Nov 2013]

STAC3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.048773527).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
STAC3	NM_145064.3 linkuse as main transcript	c.1022C>T	p.Ala341Val	missense_variant	12/12	ENST00000332782.7	NP_659501.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
STAC3	ENST00000332782.7 linkuse as main transcript	c.1022C>T	p.Ala341Val	missense_variant	12/12	2	NM_145064.3	ENSP00000329200	P1	Q96MF2-1
STAC3	ENST00000554578.5 linkuse as main transcript	c.905C>T	p.Ala302Val	missense_variant	11/11	1		ENSP00000452068		Q96MF2-2
STAC3	ENST00000557176.5 linkuse as main transcript	c.*82C>T		3_prime_UTR_variant, NMD_transcript_variant	8/8	1		ENSP00000450740
STAC3	ENST00000546246.2 linkuse as main transcript	c.464C>T	p.Ala155Val	missense_variant	9/9	2		ENSP00000441515		Q96MF2-3

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152072

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000200

AC:

AN:

250334

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135520

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000239

AC:

AN:

1461660

Hom.:

Cov.:

AF XY:

0.0000248

AC XY:

AN XY:

727126

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000448

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:

0.0000279

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152072

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74294

show subpopulations

Gnomad4 AFR

AF:

0.0000725

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000474

Hom.:

Bravo

AF:

0.0000340

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Bailey-Bloch congenital myopathy

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Sep 27, 2022	This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 341 of the STAC3 protein (p.Ala341Val). This variant is present in population databases (rs753014378, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with STAC3-related conditions. ClinVar contains an entry for this variant (Variation ID: 851418). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt STAC3 protein function. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jan 13, 2023	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 01, 2021

The c.1022C>T (p.A341V) alteration is located in exon 12 (coding exon 11) of the STAC3 gene. This alteration results from a C to T substitution at nucleotide position 1022, causing the alanine (A) at amino acid position 341 to be replaced by a valine (V). 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

0.065

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.68

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.025

.;T;.

Eigen

Benign

-0.71

Eigen_PC

Benign

-0.52

FATHMM_MKL

Benign

0.21

LIST_S2

Benign

0.70

T;T;T

M_CAP

Benign

0.0050

MetaRNN

Benign

0.049

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.41

.;N;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Uncertain

0.53

PROVEAN

Benign

-0.76

N;N;N

REVEL

Benign

0.074

Sift

Benign

0.46

T;T;T

Sift4G

Benign

0.36

T;T;T

Polyphen

0.0070

.;B;.

Vest4

0.039

MutPred

0.56

.;Gain of catalytic residue at K346 (P = 0.0028);.;

MVP

0.20

MPC

0.33

ClinPred

0.054

GERP RS

3.8

Varity_R

0.15

gMVP

0.22

Splicing

Name

Calibrated prediction

Score

Prediction

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

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