rs878854225

Variant names:

• chr19-11041380-G-A
• rs878854225
• NM_001387283.1:c.4340G>A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 1P and 6B. PP2 BP4 BP6 BS2

The NM_003072.5(SMARCA4):​c.4244G>A​(p.Arg1415Gln) variant causes a missense change. The variant allele was found at a frequency of 0.0000062 in 1,612,602 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000062 (0 hom.)
• Consequence: SMARCA4 NM_003072.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 6.76

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]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.39901164).
• BP6: Variant 19-11041380-G-A is Benign according to our data. Variant chr19-11041380-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 238465.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.
• BS2: High AC in GnomAdExome4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCA4	NM_001387283.1	c.4340G>A	p.Arg1447Gln	missense_variant	Exon 31 of 36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5	c.4244G>A	p.Arg1415Gln	missense_variant	Exon 30 of 35	ENST00000344626.10	NP_003063.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCA4	ENST00000646693.2	c.4340G>A	p.Arg1447Gln	missense_variant	Exon 31 of 36		NM_001387283.1	ENSP00000495368.1
SMARCA4	ENST00000344626.10	c.4244G>A	p.Arg1415Gln	missense_variant	Exon 30 of 35	1	NM_003072.5	ENSP00000343896.4
SMARCA4	ENST00000643549.1	c.4250G>A	p.Arg1417Gln	missense_variant	Exon 30 of 35			ENSP00000493975.1
SMARCA4	ENST00000541122.6	c.4154G>A	p.Arg1385Gln	missense_variant	Exon 30 of 35	5		ENSP00000445036.2
SMARCA4	ENST00000643296.1	c.4154G>A	p.Arg1385Gln	missense_variant	Exon 29 of 34			ENSP00000496635.1
SMARCA4	ENST00000644737.1	c.4154G>A	p.Arg1385Gln	missense_variant	Exon 29 of 34			ENSP00000495548.1
SMARCA4	ENST00000589677.5	c.4154G>A	p.Arg1385Gln	missense_variant	Exon 30 of 35	5		ENSP00000464778.1
SMARCA4	ENST00000643995.1	c.3665G>A	p.Arg1222Gln	missense_variant	Exon 27 of 32			ENSP00000496004.1
SMARCA4	ENST00000644963.1	c.2897G>A	p.Arg966Gln	missense_variant	Exon 23 of 28			ENSP00000495599.1
SMARCA4	ENST00000644065.1	c.2879G>A	p.Arg960Gln	missense_variant	Exon 22 of 27			ENSP00000493615.1
SMARCA4	ENST00000642350.1	c.2738G>A	p.Arg913Gln	missense_variant	Exon 22 of 27			ENSP00000495355.1
SMARCA4	ENST00000643857.1	c.2606G>A	p.Arg869Gln	missense_variant	Exon 21 of 25			ENSP00000494159.1
SMARCA4	ENST00000538456.4	c.410G>A	p.Arg137Gln	missense_variant	Exon 4 of 8	3		ENSP00000495197.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152182 Hom.: 0 Cov.: 32

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00000402 AC: 1 AN: 248488 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 134794

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: 0.00000887

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000616 AC: 9 AN: 1460420 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 726582

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.0000192

Gnomad4 NFE exome AF: 0.00000630

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152182 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74360

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: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000301 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Rhabdoid tumor predisposition syndrome 2 Uncertain:1

Oct 30, 2024

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 glutamine, which is neutral and polar, at codon 1447 of the SMARCA4 protein (p.Arg1447Gln). This variant is present in population databases (no rsID available, gnomAD 0.004%). 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: 238465). 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 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. -

not provided Uncertain:1

Sep 02, 2024

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The SMARCA4 c.4340G>A (p.Arg1447Gln) variant has not been reported in individuals with SMARCA4-related conditions in the published literature. The frequency of this variant in the general population, 0.0000071 (2/279866 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded inconclusive or damaging predictions. Based on the available information, we are unable to determine the clinical significance of this variant. -

Hereditary cancer-predisposing syndrome Benign:1

Feb 16, 2023

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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	0.21
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.43	T;.;T;.;.;.;.;.;.;.;T;.;.;.;.;.;T;T;.;.;.;.;.
Eigen	Benign	0.092
Eigen_PC	Uncertain	0.24
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.94	.;D;.;.;.;.;D;.;.;.;D;.;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Pathogenic	0.53	D
MetaRNN	Benign	0.40	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	-0.077	T
MutationAssessor	Benign	1.2	L;.;.;.;.;.;.;.;.;.;L;.;.;.;.;.;.;.;.;.;.;.;.
PrimateAI	Uncertain	0.75	T
PROVEAN	Benign	-1.2	N;.;.;.;.;.;.;.;.;.;N;.;.;.;N;.;D;.;.;.;.;.;.
REVEL	Uncertain	0.40
Sift	Benign	0.30	T;.;.;.;.;.;.;.;.;.;T;.;.;.;T;.;D;.;.;.;.;.;.
Sift4G	Benign	0.28	T;.;.;.;.;.;.;.;.;.;T;.;T;T;T;T;T;T;.;.;.;.;.
Polyphen		0.45	P;.;D;.;.;.;.;.;.;.;P;.;.;.;.;.;.;D;.;.;.;.;.
Vest4		0.50
MutPred		0.26		.;.;Loss of MoRF binding (P = 0.0684);.;.;.;.;.;.;.;.;.;.;.;.;.;.;Loss of MoRF binding (P = 0.0684);.;.;.;.;.;
MVP		0.80
MPC		1.1
ClinPred		0.67	D
GERP RS		4.4
Varity_R		0.17
gMVP		0.79

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

Other links and lift over

dbSNP: rs878854225; hg19: chr19-11152056;