19-10996541-C-T

Position:

• chr19-10996541-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP6 BS2

The NM_003072.5(SMARCA4):​c.1809C>T​(p.Gly603Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,672 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: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: SMARCA4 NM_003072.5 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:2
• Conservation: PhyloP100: -3.08

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 -5 ACMG points.

• BP6: Variant 19-10996541-C-T is Benign according to our data. Variant chr19-10996541-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 537808.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}.
• BS2: High AC in GnomAdExome4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMARCA4	NM_001387283.1	c.1809C>T	p.Gly603Gly	synonymous_variant	11/36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5	c.1809C>T	p.Gly603Gly	synonymous_variant	11/35	ENST00000344626.10	NP_003063.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SMARCA4	ENST00000646693.2	c.1809C>T	p.Gly603Gly	synonymous_variant	11/36		NM_001387283.1	ENSP00000495368.1
SMARCA4	ENST00000344626.10	c.1809C>T	p.Gly603Gly	synonymous_variant	11/35	1	NM_003072.5	ENSP00000343896.4
SMARCA4	ENST00000643549.1	c.1809C>T	p.Gly603Gly	synonymous_variant	11/35			ENSP00000493975.1
SMARCA4	ENST00000541122.6	c.1809C>T	p.Gly603Gly	synonymous_variant	12/35	5		ENSP00000445036.2
SMARCA4	ENST00000643296.1	c.1809C>T	p.Gly603Gly	synonymous_variant	11/34			ENSP00000496635.1
SMARCA4	ENST00000644737.1	c.1809C>T	p.Gly603Gly	synonymous_variant	11/34			ENSP00000495548.1
SMARCA4	ENST00000589677.5	c.1809C>T	p.Gly603Gly	synonymous_variant	12/35	5		ENSP00000464778.1
SMARCA4	ENST00000643995.1	c.1221C>T	p.Gly407Gly	synonymous_variant	8/32			ENSP00000496004.1
SMARCA4	ENST00000644963.1	c.453C>T	p.Gly151Gly	synonymous_variant	4/28			ENSP00000495599.1
SMARCA4	ENST00000644065.1	c.534C>T	p.Gly178Gly	synonymous_variant	4/27			ENSP00000493615.1
SMARCA4	ENST00000642350.1	c.294C>T	p.Gly98Gly	synonymous_variant	3/27			ENSP00000495355.1
SMARCA4	ENST00000643857.1	c.162C>T	p.Gly54Gly	synonymous_variant	2/25			ENSP00000494159.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000795 AC: 2 AN: 251494 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135920

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000109

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461672 Hom.: 0 Cov.: 33 AF XY: 0.00000688 AC XY: 5 AN XY: 727156

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jul 11, 2023

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis suggests this variant may impact gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown. -

SMARCA4-related disorder Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 23, 2024

The SMARCA4 c.1809C>T variant is not predicted to result in an amino acid change (p.=). This variant is predicted to alter splicing based on available splicing prediction programs (SpliceAI, Jaganathan et al. 2019. PubMed ID: 30661751). To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.011% of alleles in individuals of East Asian descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Rhabdoid tumor predisposition syndrome 2 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 31, 2023

- -

Hereditary cancer-predisposing syndrome Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 30, 2019

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
BayesDel_noAF	Benign	-0.37
CADD	Benign	3.9
DANN	Benign	0.55
RBP_binding_hub_radar		1.0
RBP_regulation_power_radar		2.8

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.25		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.25		Position offset: -2

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

Publications

LitVar

Other links and lift over

dbSNP: rs1212410709; hg19: chr19-11107217;