chr9-2186120-C-A

Variant names:

• chr9-2186120-C-A
• rs1554645104
• NM_003070.5:c.4486C>A

Variant summary

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

The NM_003070.5(SMARCA2):​c.4486C>A​(p.Gln1496Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. Q1496H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SMARCA2 NM_003070.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.86
• Publications: 0 publications found

Genes affected

SMARCA2 (HGNC:11098): (SWI/SNF related, matrix associated, actin dependent regulator of chromatin, subfamily a, member 2) The protein encoded by this gene is a member of the SWI/SNF family of proteins and is highly 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. Alternatively spliced transcript variants encoding different isoforms have been found for this gene, which contains a trinucleotide repeat (CAG) length polymorphism. [provided by RefSeq, Jan 2014]

SMARCA2 Gene-Disease associations (from GenCC):

• intellectual disability-sparse hair-brachydactyly syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen

ENSG00000306181 (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
SMARCA2	NM_003070.5	c.4486C>A	p.Gln1496Lys	missense_variant	Exon 32 of 34	ENST00000349721.8	NP_003061.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCA2	ENST00000349721.8	c.4486C>A	p.Gln1496Lys	missense_variant	Exon 32 of 34	5	NM_003070.5	ENSP00000265773.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Feb 03, 2017

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.030
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.62	.;.;D;.;D;.;.;.;.;.;T;.;.;T;.;.;.;.;.;.;.;T;T;T
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	.;D;.;D;D;D;D;D;.;D;.;D;D;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Benign	0.018	T
MetaRNN	Uncertain	0.52	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Benign	-0.98	T
MutationAssessor	Uncertain	2.3	.;.;M;.;M;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.
PhyloP100		7.9
PrimateAI	Pathogenic	0.86	D
PROVEAN	Uncertain	-2.7	D;.;D;D;D;.;.;.;.;.;.;N;N;N;D;.;.;.;.;.;.;N;.;.
REVEL	Benign	0.22
Sift	Uncertain	0.023	D;.;D;D;D;.;.;.;.;.;.;T;T;T;T;.;.;.;.;.;.;T;.;.
Sift4G	Uncertain	0.038	D;D;D;D;D;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
Polyphen		0.91	P;.;P;P;P;.;.;.;.;.;B;B;.;B;.;.;.;.;.;.;.;.;.;.
Vest4		0.86
MutPred		0.35		.;.;Gain of methylation at Q1496 (P = 0.0017);.;Gain of methylation at Q1496 (P = 0.0017);.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;
MVP		0.77
MPC		0.20
ClinPred		0.94	D
GERP RS		5.5
Varity_R		0.76
gMVP		0.33
Mutation Taster		=51/49	polymorphism

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

Other links and lift over

dbSNP: rs1554645104; hg19: chr9-2186120;