chr19-11060192-G-T

Position:

• chr19-11060192-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_003072.5(SMARCA4):​c.4911+5G>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SMARCA4 NM_003072.5 splice_region, intron
• Scores: Splicing: ADA: 0.9972
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.39

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMARCA4	NM_001387283.1	c.5007+5G>T		splice_region_variant, intron_variant		ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5	c.4911+5G>T		splice_region_variant, intron_variant		ENST00000344626.10	NP_003063.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SMARCA4	ENST00000646693.2	c.5007+5G>T		splice_region_variant, intron_variant			NM_001387283.1	ENSP00000495368.1
SMARCA4	ENST00000344626.10	c.4911+5G>T		splice_region_variant, intron_variant		1	NM_003072.5	ENSP00000343896.4
SMARCA4	ENST00000643549.1	c.4917+5G>T		splice_region_variant, intron_variant				ENSP00000493975.1
SMARCA4	ENST00000541122.6	c.4821+5G>T		splice_region_variant, intron_variant		5		ENSP00000445036.2
SMARCA4	ENST00000643296.1	c.4821+5G>T		splice_region_variant, intron_variant				ENSP00000496635.1
SMARCA4	ENST00000644737.1	c.4821+5G>T		splice_region_variant, intron_variant				ENSP00000495548.1
SMARCA4	ENST00000589677.5	c.4818+5G>T		splice_region_variant, intron_variant		5		ENSP00000464778.1
SMARCA4	ENST00000643995.1	c.4332+5G>T		splice_region_variant, intron_variant				ENSP00000496004.1
SMARCA4	ENST00000644963.1	c.3561+5G>T		splice_region_variant, intron_variant				ENSP00000495599.1
SMARCA4	ENST00000644065.1	c.3543+5G>T		splice_region_variant, intron_variant				ENSP00000493615.1
SMARCA4	ENST00000642350.1	c.3405+5G>T		splice_region_variant, intron_variant				ENSP00000495355.1
SMARCA4	ENST00000643857.1	c.3171+5G>T		splice_region_variant, intron_variant				ENSP00000494159.1
SMARCA4	ENST00000538456.4	c.975+5G>T		splice_region_variant, intron_variant		3		ENSP00000495197.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 12, 2022

The c.5007+5G>T intronic variant results from a G to T substitution 5 nucleotides after coding exon 34 in the SMARCA4 gene. This nucleotide position is not well conserved in available vertebrate species. In silico splice site analysis for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.53
CADD	Benign	21
DANN	Benign	0.87
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.87
SpliceAI score (max)		0.24		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.24		Position offset: -5

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-11170868;