19-11041430-G-T

Position:

• chr19-11041430-G-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 3P and 5B. PM2 PP2 BP4 BS2

The NM_003072.5(SMARCA4):​c.4294G>T​(p.Asp1432Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,460,150 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 Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: SMARCA4 NM_003072.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 7.88

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 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SMARCA4. . Gene score misZ 6.8459 (greater than the threshold 3.09). Trascript score misZ 8.7957 (greater than threshold 3.09). GenCC has associacion of gene with 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=0.41723827).
• BS2: High AC in GnomAdExome4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMARCA4	NM_001387283.1	c.4390G>T	p.Asp1464Tyr	missense_variant	31/36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5	c.4294G>T	p.Asp1432Tyr	missense_variant	30/35	ENST00000344626.10	NP_003063.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SMARCA4	ENST00000646693.2	c.4390G>T	p.Asp1464Tyr	missense_variant	31/36		NM_001387283.1	ENSP00000495368.1
SMARCA4	ENST00000344626.10	c.4294G>T	p.Asp1432Tyr	missense_variant	30/35	1	NM_003072.5	ENSP00000343896.4
SMARCA4	ENST00000643549.1	c.4300G>T	p.Asp1434Tyr	missense_variant	30/35			ENSP00000493975.1
SMARCA4	ENST00000541122.6	c.4204G>T	p.Asp1402Tyr	missense_variant	30/35	5		ENSP00000445036.2
SMARCA4	ENST00000643296.1	c.4204G>T	p.Asp1402Tyr	missense_variant	29/34			ENSP00000496635.1
SMARCA4	ENST00000644737.1	c.4204G>T	p.Asp1402Tyr	missense_variant	29/34			ENSP00000495548.1
SMARCA4	ENST00000589677.5	c.4204G>T	p.Asp1402Tyr	missense_variant	30/35	5		ENSP00000464778.1
SMARCA4	ENST00000643995.1	c.3715G>T	p.Asp1239Tyr	missense_variant	27/32			ENSP00000496004.1
SMARCA4	ENST00000644963.1	c.2947G>T	p.Asp983Tyr	missense_variant	23/28			ENSP00000495599.1
SMARCA4	ENST00000644065.1	c.2929G>T	p.Asp977Tyr	missense_variant	22/27			ENSP00000493615.1
SMARCA4	ENST00000642350.1	c.2788G>T	p.Asp930Tyr	missense_variant	22/27			ENSP00000495355.1
SMARCA4	ENST00000643857.1	c.2656G>T	p.Asp886Tyr	missense_variant	21/25			ENSP00000494159.1
SMARCA4	ENST00000538456.4	c.460G>T	p.Asp154Tyr	missense_variant	4/8	3		ENSP00000495197.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000405 AC: 1 AN: 247190 Hom.: 0 AF XY: 0.00000744 AC XY: 1 AN XY: 134392

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: 0.00000893

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1460150 Hom.: 0 Cov.: 32 AF XY: 0.00000413 AC XY: 3 AN XY: 726444

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: 0.00000450

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Rhabdoid tumor predisposition syndrome 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 06, 2023

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. 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. This variant has not been reported in the literature in individuals affected with SMARCA4-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change replaces aspartic acid, which is acidic and polar, with tyrosine, which is neutral and polar, at codon 1464 of the SMARCA4 protein (p.Asp1464Tyr). -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 05, 2024

The p.D1464Y variant (also known as c.4390G>T), located in coding exon 30 of the SMARCA4 gene, results from a G to T substitution at nucleotide position 4390. The aspartic acid at codon 1464 is replaced by tyrosine, an amino acid with highly dissimilar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.54
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.59	D;.;T;.;.;.;.;.;.;.;D;.;.;.;.;.;T;T;.;.;.;.;.
Eigen	Uncertain	0.25
Eigen_PC	Uncertain	0.34
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.97	.;D;.;.;.;.;D;.;.;.;D;.;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Pathogenic	0.47	D
MetaRNN	Benign	0.42	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	0.030	D
MutationAssessor	Benign	1.0	L;.;.;.;.;.;.;.;.;.;L;.;.;.;.;.;.;.;.;.;.;.;.
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-2.4	N;.;.;.;.;.;.;.;.;.;N;.;D;.;N;.;.;.;.;.;.;.;.
REVEL	Uncertain	0.41
Sift	Uncertain	0.0060	D;.;.;.;.;.;.;.;.;.;D;.;D;.;D;.;.;.;.;.;.;.;.
Sift4G	Uncertain	0.0080	D;.;.;.;.;.;.;.;.;.;D;.;D;D;D;D;D;D;.;.;.;.;.
Polyphen		0.80	P;.;D;.;.;.;.;.;.;.;P;.;.;.;.;.;.;D;.;.;.;.;.
Vest4		0.59
MutPred		0.21		.;.;Gain of loop (P = 0.0079);.;.;.;.;.;.;.;.;.;.;.;.;.;.;Gain of loop (P = 0.0079);.;.;.;.;.;
MVP		0.74
MPC		1.9
ClinPred		0.75	D
GERP RS		4.4
Varity_R		0.36
gMVP		0.80

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: rs755295556; hg19: chr19-11152106;