rs1555755067

Variant names:

• chr19-10987785-CCACCG-C
• rs1555755067
• NM_001387283.1:c.982_986delCCGCA

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_003072.5(SMARCA4):​c.982_986delCCGCA​(p.Pro328AspfsTer57) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SMARCA4 NM_003072.5 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.65

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 Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 19-10987785-CCACCG-C is Pathogenic according to our data. Variant chr19-10987785-CCACCG-C is described in ClinVar as [Pathogenic]. Clinvar id is 537779.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCA4	NM_001387283.1	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 6 of 36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 6 of 35	ENST00000344626.10	NP_003063.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCA4	ENST00000646693.2	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 6 of 36		NM_001387283.1	ENSP00000495368.1
SMARCA4	ENST00000344626.10	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 6 of 35	1	NM_003072.5	ENSP00000343896.4
SMARCA4	ENST00000643549.1	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 6 of 35			ENSP00000493975.1
SMARCA4	ENST00000541122.6	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 7 of 35	5		ENSP00000445036.2
SMARCA4	ENST00000643296.1	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 6 of 34			ENSP00000496635.1
SMARCA4	ENST00000644737.1	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 6 of 34			ENSP00000495548.1
SMARCA4	ENST00000589677.5	c.982_986delCCGCA	p.Pro328AspfsTer57	frameshift_variant	Exon 7 of 35	5		ENSP00000464778.1
SMARCA4	ENST00000643995.1	c.394_398delCCGCA	p.Pro132fs	frameshift_variant	Exon 3 of 32			ENSP00000496004.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Rhabdoid tumor predisposition syndrome 2 Pathogenic:1

Aug 22, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with SMARCA4-related disease. Loss-of-function variants in SMARCA4 are known to be pathogenic (PMID: 24658001, 24658002). For these reasons, this variant has been classified as Pathogenic. This sequence change creates a premature translational stop signal (p.Pro328Aspfs*57) in the SMARCA4 gene. It is expected to result in an absent or disrupted protein product. -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1555755067; hg19: chr19-11098461;