rs371214327

Positions:

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 1P and 8B. PP2BP4_StrongBS2

The NM_003072.5(SMARCA4):c.1018G>A(p.Ala340Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000218 in 1,607,814 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A340V) has been classified as Likely benign.

Frequency

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

Exomes 𝑓: 0.000019 ( 0 hom. )

Consequence

SMARCA4
NM_003072.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:1

Conservation

PhyloP100: 0.840

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:

SMARCA4 (HGNC:):

SMARCA4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SMARCA4. . Gene score misZ 6.8459 (greater than the threshold 3.09). Trascript score misZ 8.7957 (greater than threshold 3.09). GenCC has associacion of gene with uterine corpus sarcoma, Coffin-Siris syndrome 1, intellectual disability, autosomal dominant 16, rhabdoid tumor predisposition syndrome 2, familial rhabdoid tumor, hereditary nonpolyposis colon cancer, Coffin-Siris syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.05673471).

BS2

High AC in GnomAd4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMARCA4	NM_001387283.1 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	6/36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	6/35	ENST00000344626.10	NP_003063.2	P51532-1A7E2E1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
SMARCA4	ENST00000646693.2 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	6/36		NM_001387283.1	ENSP00000495368.1	Q9HBD4
SMARCA4	ENST00000344626.10 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	6/35	1	NM_003072.5	ENSP00000343896.4	P51532-1
SMARCA4	ENST00000643549.1 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	6/35			ENSP00000493975.1	A0A2R8Y4P4
SMARCA4	ENST00000541122.6 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	7/35	5		ENSP00000445036.2	P51532-4
SMARCA4	ENST00000643296.1 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	6/34			ENSP00000496635.1	P51532-4
SMARCA4	ENST00000644737.1 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	6/34			ENSP00000495548.1	P51532-4
SMARCA4	ENST00000589677.5 linkuse as main transcript	c.1018G>A	p.Ala340Thr	missense_variant	7/35	5		ENSP00000464778.1	P51532-3
SMARCA4	ENST00000643995.1 linkuse as main transcript	c.430G>A	p.Ala144Thr	missense_variant	3/32			ENSP00000496004.1	A0A2R8YGG3

Frequencies

GnomAD3 genomes

AF:

0.0000461

AC:

AN:

151992

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000386

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000481

GnomAD3 exomes

AF:

0.0000352

AC:

AN:

227340

Hom.:

AF XY:

0.0000399

AC XY:

AN XY:

125186

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000599

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000288

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000101

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000192

AC:

AN:

1455706

Hom.:

Cov.:

AF XY:

0.0000166

AC XY:

AN XY:

723878

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000453

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000304

Gnomad4 SAS exome

AF:

0.0000351

Gnomad4 FIN exome

AF:

0.0000387

Gnomad4 NFE exome

AF:

0.00000811

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152108

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000387

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000476

Bravo

AF:

0.0000227

ESP6500AA

AF:

0.000234

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000332

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign: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	Feb 13, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 04, 2024	This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 340 of the SMARCA4 protein (p.Ala340Thr). This variant is present in population databases (rs371214327, gnomAD 0.03%). 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: 238356). 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. -

Rhabdoid tumor predisposition syndrome 2;C3553249:Intellectual disability, autosomal dominant 16

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

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

GeneDx

Apr 02, 2023

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

SMARCA4-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 27, 2022

The SMARCA4 c.1018G>A variant is predicted to result in the amino acid substitution p.Ala340Thr. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.029% of alleles in individuals of East Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/19-11098500-G-A) and interpreted as a variant of uncertain significance in ClinVar (https://preview.ncbi.nlm.nih.gov/clinvar/variation/238356/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Hereditary cancer-predisposing syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 14, 2021

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

0.069

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.40

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.24

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

Eigen

Benign

-0.57

Eigen_PC

Benign

-0.43

FATHMM_MKL

Benign

0.29

LIST_S2

Uncertain

0.88

.;D;.;.;.;.;D;.;.;.;D;.;D;D;D;D;D;D

M_CAP

Benign

0.067

MetaRNN

Benign

0.057

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

MetaSVM

Benign

-0.81

MutationAssessor

Benign

0.0

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

PrimateAI

Uncertain

0.65

PROVEAN

Benign

-0.30

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

REVEL

Benign

0.17

Sift

Benign

0.38

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

Sift4G

Benign

0.68

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

Polyphen

0.051

B;.;B;.;.;.;.;.;.;.;B;.;.;.;.;.;.;B

Vest4

0.24

MVP

0.36

MPC

0.25

ClinPred

0.045

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.036

gMVP

0.15

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