NM_001387283.1:c.290G>T

Variant names:

• chr19-10985340-G-T
• rs1056057044
• NM_001387283.1:c.290G>T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001387283.1(SMARCA4):​c.290G>T​(p.Gly97Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign 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. G97A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SMARCA4 NM_001387283.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.78
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.28723735).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCA4	NM_001387283.1	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 35	ENST00000344626.10	NP_003063.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCA4	ENST00000646693.2	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 36		NM_001387283.1	ENSP00000495368.1
SMARCA4	ENST00000344626.10	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 35	1	NM_003072.5	ENSP00000343896.4
SMARCA4	ENST00000643549.1	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 35			ENSP00000493975.1
SMARCA4	ENST00000541122.6	c.290G>T	p.Gly97Val	missense_variant	Exon 4 of 35	5		ENSP00000445036.2
SMARCA4	ENST00000643296.1	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 34			ENSP00000496635.1
SMARCA4	ENST00000644737.1	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 34			ENSP00000495548.1
SMARCA4	ENST00000589677.5	c.290G>T	p.Gly97Val	missense_variant	Exon 4 of 35	5		ENSP00000464778.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Rhabdoid tumor predisposition syndrome 2 Uncertain:1

Aug 09, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C15"). This variant has not been reported in the literature in individuals affected with SMARCA4-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces glycine with valine at codon 97 of the SMARCA4 protein (p.Gly97Val). The glycine residue is moderately conserved and there is a moderate physicochemical difference between glycine and valine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Uncertain	0.063	T
BayesDel_noAF	Benign	-0.15
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.51	D;.;T;.;.;.;.;.;.;.;D;.;.;.;.;.;.;T;T
Eigen	Benign	-0.097
Eigen_PC	Benign	0.031
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.95	.;D;.;.;.;.;D;.;.;.;D;D;.;D;D;D;D;D;D
M_CAP	Uncertain	0.22	D
MetaRNN	Benign	0.29	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	-0.13	T
MutationAssessor	Benign	0.69	N;.;.;.;N;N;.;N;N;N;N;.;N;N;N;N;N;.;.
PhyloP100		3.8
PrimateAI	Uncertain	0.72	T
PROVEAN	Benign	-1.7	N;.;.;.;.;.;.;.;.;.;N;.;.;N;.;N;.;N;N
REVEL	Uncertain	0.39
Sift	Uncertain	0.0050	D;.;.;.;.;.;.;.;.;.;D;.;.;D;.;D;.;D;D
Sift4G	Benign	0.51	T;.;.;.;.;.;.;.;.;.;T;.;.;T;T;T;T;T;T
Polyphen		0.099	B;.;B;.;.;.;.;.;.;.;B;.;.;.;.;.;.;.;B
Vest4		0.76
MutPred		0.31		Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);
MVP		0.71
MPC		0.39
ClinPred		0.61	D
GERP RS		3.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.18
gMVP		0.47
Mutation Taster		=80/20	polymorphism

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

Other links and lift over

dbSNP: rs1056057044; hg19: chr19-11096016;