NM_001387283.1:c.3356G>A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2PP2PP3_Moderate

The NM_001387283.1(SMARCA4):c.3356G>A(p.Arg1119His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,194 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 (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Consequence

SMARCA4
NM_001387283.1 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 9.64

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the SMARCA4 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 59 curated pathogenic missense variants (we use a threshold of 10). The gene has 56 curated benign missense variants. Gene score misZ: 6.8459 (above the threshold of 3.09). Trascript score misZ: 8.7957 (above the threshold of 3.09). GenCC associations: The gene is linked to 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.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.89

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCA4	NM_001387283.1 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 24 of 36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 24 of 35	ENST00000344626.10	NP_003063.2	P51532-1A7E2E1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SMARCA4	ENST00000646693.2 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 24 of 36		NM_001387283.1	ENSP00000495368.1	Q9HBD4
SMARCA4	ENST00000344626.10 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 24 of 35	1	NM_003072.5	ENSP00000343896.4	P51532-1
SMARCA4	ENST00000643549.1 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 24 of 35			ENSP00000493975.1	A0A2R8Y4P4
SMARCA4	ENST00000541122.6 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 25 of 35	5		ENSP00000445036.2	P51532-4
SMARCA4	ENST00000643296.1 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 24 of 34			ENSP00000496635.1	P51532-4
SMARCA4	ENST00000644737.1 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 24 of 34			ENSP00000495548.1	P51532-4
SMARCA4	ENST00000589677.5 link	c.3356G>A	p.Arg1119His	missense_variant	Exon 25 of 35	5		ENSP00000464778.1	P51532-3
SMARCA4	ENST00000643995.1 link	c.2768G>A	p.Arg923His	missense_variant	Exon 21 of 32			ENSP00000496004.1	A0A2R8YGG3
SMARCA4	ENST00000644963.1 link	c.2000G>A	p.Arg667His	missense_variant	Exon 17 of 28			ENSP00000495599.1	A0A2R8YG32
SMARCA4	ENST00000644065.1 link	c.2081G>A	p.Arg694His	missense_variant	Exon 17 of 27			ENSP00000493615.1	A0A2R8Y440
SMARCA4	ENST00000642350.1 link	c.1841G>A	p.Arg614His	missense_variant	Exon 16 of 27			ENSP00000495355.1	A0A2R8Y6N0
SMARCA4	ENST00000643857.1 link	c.1709G>A	p.Arg570His	missense_variant	Exon 15 of 25			ENSP00000494159.1	A0A2R8Y526

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251492

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135922

show subpopulations

Gnomad AFR exome

AF:

0.0000615

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Intellectual disability, autosomal dominant 16

Uncertain:1

Jul 15, 2021

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Rhabdoid tumor predisposition syndrome 2

Uncertain:1

Jan 08, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 1119 of the SMARCA4 protein (p.Arg1119His). This variant is present in population databases (rs370466670, gnomAD 0.007%). 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: 537795). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt SMARCA4 protein function with a positive 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. -

Hereditary cancer-predisposing syndrome

Uncertain:1

Sep 16, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R1119H variant (also known as c.3356G>A), located in coding exon 23 of the SMARCA4 gene, results from a G to A substitution at nucleotide position 3356. The arginine at codon 1119 is replaced by histidine, an amino acid with highly similar properties. This variant was detected in a cohort of 63 patients clinically diagnosed with Coffin-Siris syndrome and classified as a variant of unknown significance by the authors (Santen GW et al. Hum Mutat, 2013 Nov;34:1519-28). This variant was also detected in a cohort of 11 patients with autism and mild-severe intellectual disability and dysmorphic features who underwent whole exome sequencing (Vandeweyer G et al. Am J Med Genet C Semin Med Genet, 2014 Sep;166C:315-26). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.80

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Pathogenic

0.20

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.86

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

Eigen

Pathogenic

0.91

Eigen_PC

Pathogenic

0.84

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

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

M_CAP

Pathogenic

0.68

MetaRNN

Pathogenic

0.89

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

MetaSVM

Uncertain

0.50

MutationAssessor

Benign

1.7

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

PrimateAI

Pathogenic

0.86

PROVEAN

Uncertain

-4.3

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

REVEL

Pathogenic

0.79

Sift

Uncertain

0.0010

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

Sift4G

Uncertain

0.0030

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

Polyphen

1.0

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

Vest4

0.70

MVP

0.92

MPC

3.1

ClinPred

0.98

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.56

gMVP

0.96

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