17-40628799-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003079.5(SMARCE1):c.1222G>A(p.Glu408Lys) variant causes a missense change. 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)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SMARCE1 NM_003079.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 5.81

Genes affected

SMARCE1 (HGNC:11109): (SWI/SNF related, matrix associated, actin dependent regulator of chromatin, subfamily e, member 1) The protein encoded by this gene is part of the large ATP-dependent chromatin remodeling complex SWI/SNF, which is required for transcriptional activation of genes normally repressed by chromatin. The encoded protein, either alone or when in the SWI/SNF complex, can bind to 4-way junction DNA, which is thought to mimic the topology of DNA as it enters or exits the nucleosome. The protein contains a DNA-binding HMG domain, but disruption of this domain does not abolish the DNA-binding or nucleosome-displacement activities of the SWI/SNF complex. Unlike most of the SWI/SNF complex proteins, this protein has no yeast counterpart. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19703785).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SMARCE1	NM_003079.5	c.1222G>A	p.Glu408Lys	missense_variant	11/11	ENST00000348513.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMARCE1	ENST00000348513.12	c.1222G>A	p.Glu408Lys	missense_variant	11/11	1	NM_003079.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1459860 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 726278

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: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.000224 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Familial meningioma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Feb 19, 2022

This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 408 of the SMARCE1 protein (p.Glu408Lys). 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 573127). This variant has not been reported in the literature in individuals affected with SMARCE1-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 07, 2017

The p.E408K variant (also known as c.1222G>A), located in coding exon 10 of the SMARCE1 gene, results from a G to A substitution at nucleotide position 1222. The glutamic acid at codon 408 is replaced by lysine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate 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
AlphaMissense	Benign	0.086
BayesDel_addAF	Benign	-0.092	T
BayesDel_noAF	Benign	-0.37
Cadd	Benign	22
Dann	Uncertain	0.99
DEOGEN2	Benign	0.091	T;.;.;.;T;.;T;.
Eigen	Benign	0.083
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Pathogenic	1.0	D
M_CAP	Benign	0.0061	T
MetaRNN	Benign	0.20	T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.69	N;.;.;.;N;.;.;.
MutationTaster	Benign	0.92	D;D;D;D;D;D;D
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-0.68	N;.;.;.;.;.;N;.
REVEL	Benign	0.083
Sift	Pathogenic	0.0	D;.;.;.;.;.;D;.
Sift4G	Uncertain	0.056	T;.;.;.;.;.;T;T
Polyphen		0.18	B;.;.;.;B;.;.;.
Vest4		0.36
MutPred		0.10		Gain of methylation at E408 (P = 0.0024);.;.;.;Gain of methylation at E408 (P = 0.0024);.;.;.;
MVP		0.31
MPC		0.65
ClinPred		0.60	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.24
gMVP		0.12

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs1487515718; hg19: chr17-38785051;