rs768522438

chr19-10986946-G-Achr19-10986946-G-Cchr19-10986946-G-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 1P and 6B. PP2BP4_ModerateBS2

The NM_001387283.1(SMARCA4):c.802G>A(p.Val268Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000211 in 1,611,358 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V268A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

SMARCA4
NM_001387283.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 3.47

Variant links:

Genes affected

SMARCA4 (HGNC:11100): (SWI/SNF related, matrix associated, actin dependent regulator of chromatin, subfamily a, member 4) The protein encoded by this gene is a member of the SWI/SNF family of proteins and is similar to the brahma protein of Drosophila. Members of this family have helicase and ATPase activities and are thought to regulate transcription of certain genes by altering the chromatin structure around those genes. The encoded protein is part of the large ATP-dependent chromatin remodeling complex SNF/SWI, which is required for transcriptional activation of genes normally repressed by chromatin. In addition, this protein can bind BRCA1, as well as regulate the expression of the tumorigenic protein CD44. Mutations in this gene cause rhabdoid tumor predisposition syndrome type 2. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2012]

SMARCA4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

PP2

Missense variant where missense usually causes diseases, SMARCA4

BP4

Computational evidence support a benign effect (MetaRNN=0.24910665).

BS2

High AC in GnomAd at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SMARCA4	NM_001387283.1 linkuse as main transcript	c.802G>A	p.Val268Met	missense_variant	5/36	ENST00000646693.2
SMARCA4	NM_003072.5 linkuse as main transcript	c.802G>A	p.Val268Met	missense_variant	5/35	ENST00000344626.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMARCA4	ENST00000646693.2 linkuse as main transcript	c.802G>A	p.Val268Met	missense_variant	5/36		NM_001387283.1
SMARCA4	ENST00000344626.10 linkuse as main transcript	c.802G>A	p.Val268Met	missense_variant	5/35	1	NM_003072.5	P4	P51532-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000363

AC:

AN:

247910

Hom.:

AF XY:

0.0000446

AC XY:

AN XY:

134474

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000510

Gnomad NFE exome

AF:

0.0000533

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000199

AC:

AN:

1459096

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

726016

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000894

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.0000197

Gnomad4 NFE exome

AF:

0.0000144

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152262

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74458

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000596

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000247

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Rhabdoid tumor predisposition syndrome 2

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Oct 13, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Jan 18, 2024	This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 268 of the SMARCA4 protein (p.Val268Met). This variant is present in population databases (rs768522438, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with SMARCA4-related conditions. ClinVar contains an entry for this variant (Variation ID: 238522). 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 SMARCA4 protein function with a negative predictive value of 95%. 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. -

Intellectual disability, autosomal dominant 16

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Jul 15, 2021

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Quest Diagnostics Nichols Institute San Juan Capistrano

Jun 23, 2023

This variant has not been reported in the published literature. The frequency of this variant in the general population, 0.000047 (6/127888 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded conflicting predictions that this variant is benign or damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -

Hereditary cancer-predisposing syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 06, 2023

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Benign

-0.21

Cadd

Uncertain

Dann

Uncertain

0.99

DEOGEN2

Benign

0.22

T;.;T;.;.;.;.;.;.;.;T;.;.;.;.;.;T;T

Eigen

Benign

0.13

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Uncertain

0.97

M_CAP

Uncertain

0.25

MetaRNN

Benign

0.25

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.55

MutationAssessor

Benign

1.4

L;.;.;.;L;L;.;L;L;L;L;L;L;L;L;L;.;.

MutationTaster

Benign

0.71

D;D;D;D;D;D;D;D;D

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-0.41

N;.;.;.;.;.;.;.;.;.;N;.;N;.;N;.;N;N

REVEL

Benign

0.29

Sift

Benign

0.13

T;.;.;.;.;.;.;.;.;.;T;.;T;.;T;.;T;T

Sift4G

Benign

0.27

T;.;.;.;.;.;.;.;.;.;T;.;T;T;T;T;T;T

Polyphen

0.57

P;.;D;.;.;.;.;.;.;.;P;.;.;.;.;.;.;D

Vest4

0.51

MutPred

0.26

Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);Loss of catalytic residue at V268 (P = 0.0027);

MVP

0.71

MPC

0.46

ClinPred

0.085

GERP RS

4.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.058

gMVP

0.061

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