NM_001387283.1:c.2936G>A

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PM1PM2PP3_StrongPP5_Very_Strong

The NM_001387283.1(SMARCA4):c.2936G>A(p.Arg979Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. R979R) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Consequence

SMARCA4
NM_001387283.1 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:9U:1

Conservation

PhyloP100: 9.76

Publications

20 publications found

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 Gene-Disease associations (from GenCC):

Coffin-Siris syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet, Illumina
intellectual disability, autosomal dominant 16
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
rhabdoid tumor predisposition syndrome 2
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P
uterine corpus sarcoma
Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
familial rhabdoid tumor
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hereditary nonpolyposis colon cancer
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

SMARCA4 links:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_001387283.1

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.985

PP5

Variant 19-11023594-G-A is Pathogenic according to our data. Variant chr19-11023594-G-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 212246.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCA4	NM_001387283.1 link	c.2936G>A	p.Arg979Gln	missense_variant	Exon 20 of 36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5 link	c.2936G>A	p.Arg979Gln	missense_variant	Exon 20 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.2936G>A	p.Arg979Gln	missense_variant	Exon 20 of 36		NM_001387283.1	ENSP00000495368.1	Q9HBD4
SMARCA4	ENST00000344626.10 link	c.2936G>A	p.Arg979Gln	missense_variant	Exon 20 of 35	1	NM_003072.5	ENSP00000343896.4	P51532-1
SMARCA4	ENST00000643549.1 link	c.2936G>A	p.Arg979Gln	missense_variant	Exon 20 of 35			ENSP00000493975.1	A0A2R8Y4P4
SMARCA4	ENST00000541122.6 link	c.2936G>A	p.Arg979Gln	missense_variant	Exon 21 of 35	5		ENSP00000445036.2	P51532-4
SMARCA4	ENST00000643296.1 link	c.2936G>A	p.Arg979Gln	missense_variant	Exon 20 of 34			ENSP00000496635.1	P51532-4
SMARCA4	ENST00000644737.1 link	c.2936G>A	p.Arg979Gln	missense_variant	Exon 20 of 34			ENSP00000495548.1	P51532-4
SMARCA4	ENST00000589677.5 link	c.2936G>A	p.Arg979Gln	missense_variant	Exon 21 of 35	5		ENSP00000464778.1	P51532-3
SMARCA4	ENST00000643995.1 link	c.2348G>A	p.Arg783Gln	missense_variant	Exon 17 of 32			ENSP00000496004.1	A0A2R8YGG3
SMARCA4	ENST00000644963.1 link	c.1580G>A	p.Arg527Gln	missense_variant	Exon 13 of 28			ENSP00000495599.1	A0A2R8YG32
SMARCA4	ENST00000644065.1 link	c.1661G>A	p.Arg554Gln	missense_variant	Exon 13 of 27			ENSP00000493615.1	A0A2R8Y440
SMARCA4	ENST00000642350.1 link	c.1421G>A	p.Arg474Gln	missense_variant	Exon 12 of 27			ENSP00000495355.1	A0A2R8Y6N0
SMARCA4	ENST00000643857.1 link	c.1289G>A	p.Arg430Gln	missense_variant	Exon 11 of 25			ENSP00000494159.1	A0A2R8Y526

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:9Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Intellectual disability, autosomal dominant 16

Pathogenic:4

Sep 27, 2018

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was determined to be pathogenic according to ACMG Guidelines, 2015 [PMID:25741868]. This variant was previously reported as a de novo change in a male with Coffin Siri syndrome [PMID:28973083] -

Nov 11, 2020

Daryl Scott Lab, Baylor College of Medicine

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jul 15, 2021

Genome-Nilou Lab

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 06, 2021

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as Pathogenic. Following criteria are met: 0105 - The mechanism of disease is not clearly established for Coffin-Siris syndrome 4 (MIM#614609). However, susceptibility to rhabdoid tumor predisposition syndrome 2 (MIM#613325) is caused by loss of function variants (OMIM, PMID: 22426308). (I) 0107 - This gene is associated with autosomal dominant disease. (I) 0200 - Variant is predicted to result in a missense amino acid change from arginine to glutamine. (I) 0251 - This variant is heterozygous. (I) 0301 - Variant is absent from gnomAD (both v2 and v3). (SP) 0501 - Missense variant consistently predicted to be damaging by multiple in silico tools or highly conserved with a major amino acid change. (SP) 0603 - Missense variant in a region that is highly intolerant to missense variation (high constraint region in DECIPHER). (SP) 0705 - No comparable missense variants have previous evidence for pathogenicity. (I) 0801 - This variant has strong previous evidence of pathogenicity in unrelated individuals. This variant has been reported mostly as likely pathogenic and pathogenic, and has been observed in multiple de novo individuals with Coffin-Siris syndrome, intellectual disability and/or cleft palate (Decipher, ClinVar, PMID: 28973083). (SP) 1102 - Strong phenotype match for this individual. (SP) 1203 - This variant has been shown to be de novo in the proband (parental status confirmed) (by trio analysis). (SP) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

Cleft palate

Pathogenic:1

Dec 03, 2018

Autoinflammatory diseases unit, CHU de Montpellier

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

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

Pathogenic:1

Jan 05, 2018

Génétique des Maladies du Développement, Hospices Civils de Lyon

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Pathogenic:1

Mar 20, 2025

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

De novo variant with confirmed parentage in a critically ill infant, but no clinical information provided (PMID: 28973083); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 33144586, 34930489, 36939041, 37541188, 35982159, 33057194, 34906496, 35385219, 24658002, 32686290, 28973083) -

Hereditary cancer-predisposing syndrome

Pathogenic:1

Aug 16, 2024

Ambry Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.R979Q pathogenic mutation (also known as c.2936G>A), located in coding exon 19 of the SMARCA4 gene, results from a G to A substitution at nucleotide position 2936. The arginine at codon 979 is replaced by glutamine, an amino acid with highly similar properties. This variant was reported in multiple individuals with features consistent with Coffin-Siris Syndrome, and the variant was reported as a de novo change in several of these individuals (Meng L et al. JAMA Pediatr, 2017 Dec;171:e173438; Li D et al. Am J Med Genet A, 2020 Sep;182:2058-2067; Domogala DD et al. Hum Genomics, 2021 Dec;15:72; Gofin Y et al. Am J Med Genet A, 2022 Sep;188:2718-2723). This missense alteration is located in a region that has a low rate of benign missense variation (Lek M et al. Nature. 2016 Aug 18;536(7616):285-91; DECIPHER: Database of Chromosomal Imbalance and Phenotype in Humans using Ensembl Resources. Firth H.V. et al. 2009. Am.J.Hum.Genet. 84, 524-533 (DOI: dx.doi.org/10/1016/j.ajhg.2009.03.010)).This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). Missense and in-frame variants in SMARCA4 are known to cause neurodevelopmental disorders; however, such associations with rhabdoid tumor predisposition syndrome including small cell carcinoma of the ovary-hypercalcemic type (SCCOHT) are exceedingly rare (Kosho T et al. Am J Med Genet C Semin Med Genet. 2014 Sep;166C(3):262-75; Jelinic P et al. Nat Genet. 2014 May;46(5):424-6). Based on the supporting evidence, this alteration is pathogenic for Coffin-Siris syndrome; however, the association of this alteration with rhabdoid tumor predisposition syndrome is unlikely. -

SMARCA4-related BAFopathy

Pathogenic:1

Jun 10, 2021

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Uncertain:1

May 06, 2015

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:flagged submission

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.58

BayesDel_noAF

Pathogenic

0.59

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.97

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

Eigen

Pathogenic

1.1

Eigen_PC

Pathogenic

1.0

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

1.0

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

M_CAP

Pathogenic

0.97

MetaRNN

Pathogenic

0.98

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

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

4.2

H;.;.;.;H;H;.;H;H;H;H;H;H;H;H;H;.;.;.;.;.;.

PhyloP100

9.8

PrimateAI

Pathogenic

0.88

PROVEAN

Uncertain

-3.6

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

REVEL

Pathogenic

0.95

Sift

Pathogenic

0.0

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

Sift4G

Pathogenic

0.0

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

Polyphen

1.0

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

Vest4

0.97

MutPred

0.90

Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);Loss of MoRF binding (P = 0.0568);.;Loss of MoRF binding (P = 0.0568);.;.;.;.;

MVP

0.97

MPC

3.5

ClinPred

1.0

GERP RS

4.9

Varity_R

0.93

gMVP

1.0

Mutation Taster

=0/100

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over