19-11033822-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 1P and 7B. PP2BP4_ModerateBS1_SupportingBS2

The NM_003072.5(SMARCA4):c.3830C>T(p.Pro1277Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000757 in 779,648 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: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000084 ( 0 hom. )

Consequence

SMARCA4
NM_003072.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:1

Conservation

PhyloP100: 4.14

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:

ENSG00000278643 (HGNC:):

ENSG00000278643 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PP2

Missense variant in the SMARCA4 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 59 curated pathogenic missense variants (we use a threshold of 10). The gene has 56 curated benign missense variants. Gene score misZ: 6.8459 (above the threshold of 3.09). Trascript score misZ: 8.7957 (above the threshold of 3.09). GenCC associations: The gene is linked to 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=0.23161674).

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0000394 (6/152208) while in subpopulation NFE AF= 0.0000735 (5/68034). AF 95% confidence interval is 0.0000285. There are 0 homozygotes in gnomad4. There are 5 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCA4	NM_001387283.1 link	c.3830C>T	p.Pro1277Leu	missense_variant	Exon 27 of 36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5 link	c.3830C>T	p.Pro1277Leu	missense_variant	Exon 27 of 35	ENST00000344626.10	NP_003063.2	P51532-1A7E2E1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SMARCA4	ENST00000646693.2 link	c.3830C>T	p.Pro1277Leu	missense_variant	Exon 27 of 36		NM_001387283.1	ENSP00000495368.1	Q9HBD4
SMARCA4	ENST00000344626.10 link	c.3830C>T	p.Pro1277Leu	missense_variant	Exon 27 of 35	1	NM_003072.5	ENSP00000343896.4	P51532-1
SMARCA4	ENST00000643995.1 link	c.3242C>T	p.Pro1081Leu	missense_variant	Exon 24 of 32			ENSP00000496004.1	A0A2R8YGG3
SMARCA4	ENST00000644963.1 link	c.2474C>T	p.Pro825Leu	missense_variant	Exon 20 of 28			ENSP00000495599.1	A0A2R8YG32
SMARCA4	ENST00000642350.1 link	c.2315C>T	p.Pro772Leu	missense_variant	Exon 19 of 27			ENSP00000495355.1	A0A2R8Y6N0
SMARCA4	ENST00000643857.1 link	c.2183C>T	p.Pro728Leu	missense_variant	Exon 18 of 25			ENSP00000494159.1	A0A2R8Y526
SMARCA4	ENST00000643549.1 link	c.3775-301C>T		intron_variant	Intron 26 of 34			ENSP00000493975.1	A0A2R8Y4P4
SMARCA4	ENST00000541122.6 link	c.3775-301C>T		intron_variant	Intron 27 of 34	5		ENSP00000445036.2	P51532-4
SMARCA4	ENST00000643296.1 link	c.3775-301C>T		intron_variant	Intron 26 of 33			ENSP00000496635.1	P51532-4
SMARCA4	ENST00000644737.1 link	c.3775-301C>T		intron_variant	Intron 26 of 33			ENSP00000495548.1	P51532-4
SMARCA4	ENST00000589677.5 link	c.3775-301C>T		intron_variant	Intron 27 of 34	5		ENSP00000464778.1	P51532-3
SMARCA4	ENST00000644065.1 link	c.2500-301C>T		intron_variant	Intron 19 of 26			ENSP00000493615.1	A0A2R8Y440
SMARCA4	ENST00000538456.4 link	c.31-301C>T		intron_variant	Intron 1 of 7	3		ENSP00000495197.1	A0A2R8YFK5

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000696

AC:

AN:

244314

Hom.:

AF XY:

0.0000971

AC XY:

AN XY:

133816

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.000101

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000111

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.0000845

AC:

AN:

627440

Hom.:

Cov.:

AF XY:

0.0000819

AC XY:

AN XY:

341862

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000229

Gnomad4 ASJ exome

AF:

0.0000477

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000287

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000129

Gnomad4 OTH exome

AF:

0.0000605

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152208

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74358

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000453

ExAC

AF:

0.0000330

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Rhabdoid tumor predisposition syndrome 2

Uncertain:2

Mar 21, 2024

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 22, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 1277 of the SMARCA4 protein (p.Pro1277Leu). This variant is present in population databases (rs746219091, gnomAD 0.01%). This missense change has been observed in individual(s) with congenital heart disease and/or neurodevelopment disorders (PMID: 27760138, 37500730). ClinVar contains an entry for this variant (Variation ID: 212253). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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. -

not specified

Uncertain:1

Aug 22, 2014

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Rhabdoid tumor predisposition syndrome 2;C3553249:Intellectual disability, autosomal dominant 16

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Intellectual disability, autosomal dominant 16

Uncertain:1

Jul 15, 2021

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1

May 28, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Observed with a second SMARCA4 variant on the opposite allele (in trans) in an individual with a congenital heart defect (PMID: 27760138); Observed in an individual with serrated polyposis (PMID: 37396538); In silico analysis indicates that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 27760138, 37396538) -

Hereditary cancer-predisposing syndrome

Benign:1

May 05, 2021

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.088

BayesDel_noAF

Benign

-0.15

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.21

T;T;T;T;.;.

Eigen

Benign

0.077

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.89

.;.;D;D;D;D

M_CAP

Uncertain

0.15

MetaRNN

Benign

0.23

T;T;T;T;T;T

MetaSVM

Uncertain

0.075

MutationAssessor

Benign

0.0

N;.;N;.;.;.

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-0.59

N;.;N;.;.;.

REVEL

Uncertain

0.43

Sift

Benign

0.055

T;.;T;.;.;.

Sift4G

Benign

0.98

T;.;T;T;.;.

Polyphen

0.98

D;B;D;B;.;.

Vest4

0.29

MutPred

0.29

Loss of glycosylation at T1274 (P = 0.0348);Loss of glycosylation at T1274 (P = 0.0348);Loss of glycosylation at T1274 (P = 0.0348);Loss of glycosylation at T1274 (P = 0.0348);.;.;

MVP

0.70

MPC

1.5

ClinPred

0.037

GERP RS

5.2

Varity_R

0.15

gMVP

0.67

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