NM_001387283.1:c.4913A>C

Variant names:

• chr19-11060093-A-C
• NM_001387283.1:c.4913A>C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_001387283.1(SMARCA4):​c.4913A>C​(p.Gln1638Pro) variant causes a missense 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. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SMARCA4 NM_001387283.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.09

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• 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=0.18864146).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCA4	NM_001387283.1	c.4913A>C	p.Gln1638Pro	missense_variant	Exon 35 of 36	ENST00000646693.2	NP_001374212.1
SMARCA4	NM_003072.5	c.4817A>C	p.Gln1606Pro	missense_variant	Exon 34 of 35	ENST00000344626.10	NP_003063.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCA4	ENST00000646693.2	c.4913A>C	p.Gln1638Pro	missense_variant	Exon 35 of 36		NM_001387283.1	ENSP00000495368.1
SMARCA4	ENST00000344626.10	c.4817A>C	p.Gln1606Pro	missense_variant	Exon 34 of 35	1	NM_003072.5	ENSP00000343896.4
SMARCA4	ENST00000643549.1	c.4823A>C	p.Gln1608Pro	missense_variant	Exon 34 of 35			ENSP00000493975.1
SMARCA4	ENST00000541122.6	c.4727A>C	p.Gln1576Pro	missense_variant	Exon 34 of 35	5		ENSP00000445036.2
SMARCA4	ENST00000643296.1	c.4727A>C	p.Gln1576Pro	missense_variant	Exon 33 of 34			ENSP00000496635.1
SMARCA4	ENST00000644737.1	c.4727A>C	p.Gln1576Pro	missense_variant	Exon 33 of 34			ENSP00000495548.1
SMARCA4	ENST00000589677.5	c.4724A>C	p.Gln1575Pro	missense_variant	Exon 34 of 35	5		ENSP00000464778.1
SMARCA4	ENST00000643995.1	c.4238A>C	p.Gln1413Pro	missense_variant	Exon 31 of 32			ENSP00000496004.1
SMARCA4	ENST00000644963.1	c.3467A>C	p.Gln1156Pro	missense_variant	Exon 27 of 28			ENSP00000495599.1
SMARCA4	ENST00000644065.1	c.3449A>C	p.Gln1150Pro	missense_variant	Exon 26 of 27			ENSP00000493615.1
SMARCA4	ENST00000642350.1	c.3311A>C	p.Gln1104Pro	missense_variant	Exon 26 of 27			ENSP00000495355.1
SMARCA4	ENST00000643857.1	c.3077A>C	p.Gln1026Pro	missense_variant	Exon 24 of 25			ENSP00000494159.1
SMARCA4	ENST00000538456.4	c.881A>C	p.Gln294Pro	missense_variant	Exon 7 of 8	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

Rhabdoid tumor predisposition syndrome 2 Uncertain:1

Mar 26, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is not present in population databases (ExAC no frequency). This sequence change replaces glutamine with proline at codon 1638 of the SMARCA4 protein (p.Gln1638Pro). The glutamine residue is moderately conserved and there is a moderate physicochemical difference between glutamine and proline. This variant has not been reported in the literature in individuals with SMARCA4-related conditions. 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, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.051
BayesDel_addAF	Uncertain	0.032	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	24
DANN	Benign	0.97
DEOGEN2	Benign	0.37	T;.;T;.;.;.;.;.;.;.;T;.;.;.;.;.;T;T;.;.;.;.
Eigen	Benign	-0.22
Eigen_PC	Benign	-0.054
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.86	.;D;.;.;.;.;D;.;.;.;D;.;D;D;D;D;D;D;T;T;T;D
M_CAP	Uncertain	0.26	D
MetaRNN	Benign	0.19	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.28	T
MutationAssessor	Benign	0.69	N;.;.;.;.;.;.;.;.;.;N;.;.;.;.;.;.;.;.;.;.;.
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-1.5	N;.;.;.;.;.;.;.;.;.;N;.;.;.;N;.;.;.;.;.;.;.
REVEL	Benign	0.22
Sift	Benign	0.13	T;.;.;.;.;.;.;.;.;.;T;.;.;.;T;.;.;.;.;.;.;.
Sift4G	Benign	0.27	T;.;.;.;.;.;.;.;.;.;T;.;T;T;T;T;T;T;.;.;.;.
Polyphen		0.18	B;.;B;.;.;.;.;.;.;.;B;.;.;.;.;.;.;B;.;.;.;.
Vest4		0.17
MutPred		0.14		.;.;Gain of loop (P = 3e-04);.;.;.;.;.;.;.;.;.;.;.;.;.;.;Gain of loop (P = 3e-04);.;.;.;.;
MVP		0.63
MPC		1.3
ClinPred		0.32	T
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.44
gMVP		0.77

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-11170769;