rs1555605744

Variant names:

• chr17-40635963-T-C
• rs1555605744
• NM_003079.5:c.509A>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_003079.5(SMARCE1):​c.509A>G​(p.Tyr170Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,434 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y170H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SMARCE1 NM_003079.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 7.70
• Publications: 0 publications found

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]

SMARCE1 Gene-Disease associations (from GenCC):

• familial meningioma

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen, G2P, Ambry Genetics
• Coffin-Siris syndrome 5

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• Coffin-Siris syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial multiple meningioma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000264058 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCE1	NM_003079.5	c.509A>G	p.Tyr170Cys	missense_variant	Exon 7 of 11	ENST00000348513.12	NP_003070.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCE1	ENST00000348513.12	c.509A>G	p.Tyr170Cys	missense_variant	Exon 7 of 11	1	NM_003079.5	ENSP00000323967.6
ENSG00000264058	ENST00000476049.1	n.*857A>G		non_coding_transcript_exon_variant	Exon 9 of 13	5		ENSP00000463483.1
ENSG00000264058	ENST00000476049.1	n.*857A>G		3_prime_UTR_variant	Exon 9 of 13	5		ENSP00000463483.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459434 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 725860

African (AFR) AF: 0.00 AC: 0 AN: 33350

American (AMR) AF: 0.00 AC: 0 AN: 44220

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26076

East Asian (EAS) AF: 0.00 AC: 0 AN: 39642

South Asian (SAS) AF: 0.00 AC: 0 AN: 85480

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53398

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111232

Other (OTH) AF: 0.00 AC: 0 AN: 60274

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Familial meningioma Uncertain:1

Nov 16, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces tyrosine with cysteine at codon 170 of the SMARCE1 protein (p.Tyr170Cys). The tyrosine residue is highly conserved and there is a large physicochemical difference between tyrosine and cysteine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with SMARCE1-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C15"). 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

Dec 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Y170C variant (also known as c.509A>G), located in coding exon 6 of the SMARCE1 gene, results from an A to G substitution at nucleotide position 509. The tyrosine at codon 170 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Uncertain	0.10	D
BayesDel_noAF	Benign	-0.090
CADD	Uncertain	26
DANN	Uncertain	0.99
DEOGEN2	Benign	0.12	T;.;.;.;.;.;.;.;.;T;.;.;T;.;.;.;.;.;.;T;.
Eigen	Uncertain	0.31
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.83	.;.;T;T;.;D;T;T;T;T;T;.;T;T;T;D;D;D;D;T;D
M_CAP	Benign	0.031	D
MetaRNN	Uncertain	0.47	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.6	L;.;.;.;L;.;.;.;.;L;.;L;.;.;.;L;.;.;.;.;.
PhyloP100		7.7
PrimateAI	Pathogenic	0.85	D
PROVEAN	Benign	-2.2	N;.;.;.;.;.;.;.;N;.;.;.;N;.;.;.;.;.;.;.;.
REVEL	Benign	0.22
Sift	Benign	0.17	T;.;.;.;.;.;.;.;T;.;.;.;T;.;.;.;.;.;.;.;.
Sift4G	Benign	0.18	T;.;.;.;.;T;.;T;T;.;.;.;T;T;.;.;.;.;.;.;.
Polyphen		0.069	B;.;.;.;.;.;.;.;.;B;.;.;D;.;.;.;.;.;.;.;.
Vest4		0.89
MutPred		0.26		Loss of phosphorylation at Y170 (P = 0.0011);.;.;.;Loss of phosphorylation at Y170 (P = 0.0011);.;.;.;.;Loss of phosphorylation at Y170 (P = 0.0011);.;Loss of phosphorylation at Y170 (P = 0.0011);.;.;.;Loss of phosphorylation at Y170 (P = 0.0011);.;Loss of phosphorylation at Y170 (P = 0.0011);.;.;.;
MVP		0.35
MPC		1.5
ClinPred		0.85	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.26
gMVP		0.77
Mutation Taster		=28/72	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs1555605744; hg19: chr17-38792215;