rs878854228

Variant names:

• chr19-11059743-C-A
• rs878854228
• NM_001387283.1:c.4732-10C>A

Your query was ambiguous. Multiple possible variants found:

• chr19-11059743-C-A
• chr19-11059743-C-G
• chr19-11059743-C-T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP6

The NM_001387283.1(SMARCA4):​c.4732-10C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000355 in 1,407,054 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: 33)
  • Exomes 𝑓: 0.0000036 (0 hom.)
• Consequence: SMARCA4 NM_001387283.1 intron
• Scores: Splicing: ADA: 0.005246
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:1
• Conservation: PhyloP100: 0.428
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• Coffin-Siris syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet, Illumina
• intellectual disability, autosomal dominant 16

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• rhabdoid tumor predisposition syndrome 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P
• uterine corpus sarcoma

  Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
• familial rhabdoid tumor

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary nonpolyposis colon cancer

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BP6: Variant 19-11059743-C-A is Benign according to our data. Variant chr19-11059743-C-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 537794.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001387283.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMARCA4	NM_001387283.1	MANE Plus Clinical	c.4732-10C>A		intron	N/A	NP_001374212.1
	SMARCA4	NM_003072.5	MANE Select	c.4636-10C>A		intron	N/A	NP_003063.2
	SMARCA4	NM_001128849.3		c.4732-10C>A		intron	N/A	NP_001122321.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMARCA4	ENST00000646693.2	MANE Plus Clinical	c.4732-10C>A		intron	N/A	ENSP00000495368.1
	SMARCA4	ENST00000344626.10	TSL:1 MANE Select	c.4636-10C>A		intron	N/A	ENSP00000343896.4
	SMARCA4	ENST00000643549.1		c.4642-10C>A		intron	N/A	ENSP00000493975.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000355 AC: 5 AN: 1407054 Hom.: 0 Cov.: 32 AF XY: 0.00000288 AC XY: 2 AN XY: 694826

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 31878

American (AMR) AF: 0.00 AC: 0 AN: 36138

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25220

East Asian (EAS) AF: 0.00 AC: 0 AN: 36166

South Asian (SAS) AF: 0.0000125 AC: 1 AN: 79818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50000

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5704

European-Non Finnish (NFE) AF: 0.00000369 AC: 4 AN: 1083692

Other (OTH) AF: 0.00 AC: 0 AN: 58438

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00139817), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	Rhabdoid tumor predisposition syndrome 2 (2)
-	1	-	Rhabdoid tumor predisposition syndrome 2;C3553249:Intellectual disability, autosomal dominant 16 (1)
-	1	-	SMARCA4-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	15
DANN	Benign	0.74
PhyloP100		0.43
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0052
dbscSNV1_RF	Benign	0.044
SpliceAI score (max)		0.27		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.27		Position offset: 37

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

Other links and lift over

dbSNP: rs878854228; hg19: chr19-11170419;