rs200525458

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_001387283.1(SMARCA4):c.4259C>G(p.Ala1420Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000125 in 1,593,736 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 8/12 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SMARCA4
NM_001387283.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.603

Variant links:

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 links:

SMARCA4 (HGNC:):

SMARCA4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 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=0.09770015).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMARCA4	NM_001387283.1 linkuse as main transcript	c.4259C>G	p.Ala1420Gly	missense_variant	30/36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5 linkuse as main transcript	c.4171-1761C>G		intron_variant		ENST00000344626.10	NP_003063.2	P51532-1A7E2E1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
SMARCA4	ENST00000646693.2 linkuse as main transcript	c.4259C>G	p.Ala1420Gly	missense_variant	30/36		NM_001387283.1	ENSP00000495368.1	Q9HBD4
SMARCA4	ENST00000643549.1 linkuse as main transcript	c.4160C>G	p.Ala1387Gly	missense_variant	29/35			ENSP00000493975.1	A0A2R8Y4P4
SMARCA4	ENST00000344626.10 linkuse as main transcript	c.4171-1761C>G		intron_variant		1	NM_003072.5	ENSP00000343896.4	P51532-1
SMARCA4	ENST00000541122.6 linkuse as main transcript	c.4072-1752C>G		intron_variant		5		ENSP00000445036.2	P51532-4
SMARCA4	ENST00000643296.1 linkuse as main transcript	c.4072-1752C>G		intron_variant				ENSP00000496635.1	P51532-4
SMARCA4	ENST00000644737.1 linkuse as main transcript	c.4072-1752C>G		intron_variant				ENSP00000495548.1	P51532-4
SMARCA4	ENST00000589677.5 linkuse as main transcript	c.4072-1752C>G		intron_variant		5		ENSP00000464778.1	P51532-3
SMARCA4	ENST00000643995.1 linkuse as main transcript	c.3583-1752C>G		intron_variant				ENSP00000496004.1	A0A2R8YGG3
SMARCA4	ENST00000644963.1 linkuse as main transcript	c.2815-1752C>G		intron_variant				ENSP00000495599.1	A0A2R8YG32
SMARCA4	ENST00000644065.1 linkuse as main transcript	c.2797-1752C>G		intron_variant				ENSP00000493615.1	A0A2R8Y440
SMARCA4	ENST00000642350.1 linkuse as main transcript	c.2656-1752C>G		intron_variant				ENSP00000495355.1	A0A2R8Y6N0
SMARCA4	ENST00000643857.1 linkuse as main transcript	c.2524-1752C>G		intron_variant				ENSP00000494159.1	A0A2R8Y526
SMARCA4	ENST00000538456.4 linkuse as main transcript	c.328-1752C>G		intron_variant		3		ENSP00000495197.1	A0A2R8YFK5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152148

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000446

AC:

AN:

224166

Hom.:

AF XY:

0.00

AC XY:

AN XY:

122892

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000619

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:

6.94e-7

AC:

AN:

1441470

Hom.:

Cov.:

AF XY:

0.00000140

AC XY:

AN XY:

716674

show subpopulations

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:

0.00

Gnomad4 OTH exome

AF:

0.0000168

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152266

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.00000830

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Rhabdoid tumor predisposition syndrome 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 14, 2023

This variant is not present in population databases (gnomAD no frequency). This sequence change replaces alanine, which is neutral and non-polar, with glycine, which is neutral and non-polar, at codon 1420 of the SMARCA4 protein (p.Ala1420Gly). This variant has not been reported in the literature in individuals affected with SMARCA4-related conditions. ClinVar contains an entry for this variant (Variation ID: 480648). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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. -

Hereditary cancer-predisposing syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 27, 2020

The p.A1420G variant (also known as c.4259C>G), located in coding exon 29 of the SMARCA4 gene, results from a C to G substitution at nucleotide position 4259. The alanine at codon 1420 is replaced by glycine, an amino acid with similar properties. This amino acid position is highly conserved in available primate species. In addition, this alteration is predicted to be tolerated by in silico analysis. 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_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.54

CADD

Benign

8.8

DANN

Uncertain

0.98

DEOGEN2

Benign

0.0064

.;T;.;.;T

Eigen

Benign

-0.79

Eigen_PC

Benign

-0.92

FATHMM_MKL

Benign

0.0064

LIST_S2

Benign

0.52

T;.;.;T;T

M_CAP

Uncertain

0.25

MetaRNN

Benign

0.098

T;T;T;T;T

MetaSVM

Benign

-1.0

PrimateAI

Uncertain

0.49

Sift4G

Benign

0.38

.;.;.;.;T

Polyphen

0.82

.;P;.;.;P

Vest4

0.19

MVP

0.16

ClinPred

0.26

GERP RS

-0.51

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over