rs111491424

chr19-10987812-C-Achr19-10987812-C-Gchr19-10987812-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP2PP3

The NM_001387283.1(SMARCA4):c.1006C>A(p.Pro336Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000218 in 1,604,326 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P336L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

SMARCA4
NM_001387283.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 7.76

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 Uncertain_significance. Variant got 2 ACMG points.

PP2

Missense variant where missense usually causes diseases, SMARCA4

PP3

MetaRNN computational evidence supports a deleterious effect, 0.748

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SMARCA4	NM_001387283.1 linkuse as main transcript	c.1006C>A	p.Pro336Thr	missense_variant	6/36	ENST00000646693.2
SMARCA4	NM_003072.5 linkuse as main transcript	c.1006C>A	p.Pro336Thr	missense_variant	6/35	ENST00000344626.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMARCA4	ENST00000646693.2 linkuse as main transcript	c.1006C>A	p.Pro336Thr	missense_variant	6/36		NM_001387283.1
SMARCA4	ENST00000344626.10 linkuse as main transcript	c.1006C>A	p.Pro336Thr	missense_variant	6/35	1	NM_003072.5	P4	P51532-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152158

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000137

AC:

AN:

219610

Hom.:

AF XY:

0.0000165

AC XY:

AN XY:

121000

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.0000317

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000213

AC:

AN:

1452168

Hom.:

Cov.:

AF XY:

0.0000194

AC XY:

AN XY:

721756

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.0000244

Gnomad4 OTH exome

AF:

0.0000667

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152158

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74330

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:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000283

Hom.:

Bravo

AF:

0.0000151

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000120

AC:

ExAC

AF:

0.00000836

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:2

Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Nov 15, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jun 24, 2023	The p.P336T variant (also known as c.1006C>A), located in coding exon 5 of the SMARCA4 gene, results from a C to A substitution at nucleotide position 1006. The proline at codon 336 is replaced by threonine, an amino acid with highly similar properties. This variant has been detected in multiple individuals with no reported features of Coffin-Siris syndrome (Ambry internal data). In one study, of 1040 patients with advanced cancer who had germline analysis of 76 cancer predisposition genes, this alteration was reported as a variant of uncertain significance (Mandelker D et al. JAMA. 2017 09;318:825-835). This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on the supporting evidence, the association of this alteration with rhabdoid tumor predisposition syndrome is unknown; however, the association of this alteration with Coffin-Siris syndrome is unlikely. -

Intellectual disability, autosomal dominant 16

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Jul 15, 2021

- -

Rhabdoid tumor predisposition syndrome 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Nov 11, 2023

This sequence change replaces proline, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 336 of the SMARCA4 protein (p.Pro336Thr). This variant is present in population databases (rs111491424, gnomAD 0.004%). This missense change has been observed in individual(s) with an unspecified cancer type (PMID: 28873162). ClinVar contains an entry for this variant (Variation ID: 220684). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SMARCA4 protein function. 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

May 07, 2023

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Uncertain

0.096

BayesDel_noAF

Uncertain

0.020

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.71

D;.;T;.;.;.;.;.;.;.;D;.;.;.;.;.;T;T

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.48

FATHMM_MKL

Pathogenic

0.99

M_CAP

Pathogenic

0.37

MetaRNN

Pathogenic

0.75

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

MetaSVM

Uncertain

0.36

MutationAssessor

Uncertain

2.1

M;.;.;.;M;M;.;M;M;M;M;M;M;M;M;M;.;.

MutationTaster

Benign

1.0

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

PrimateAI

Uncertain

0.77

PROVEAN

Uncertain

-2.9

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

REVEL

Uncertain

0.55

Sift

Benign

0.040

D;.;.;.;.;.;.;.;.;.;D;.;T;.;T;.;T;T

Sift4G

Benign

0.14

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

Polyphen

0.90

P;.;P;.;.;.;.;.;.;.;P;.;.;.;.;.;.;P

Vest4

0.76

MVP

0.67

MPC

0.74

ClinPred

0.83

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.33

gMVP

0.44

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