chr9-2115967-C-T

Position:

• chr9-2115967-C-T

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM1 PM2 PP2 PP3 PP5_Very_Strong

The NM_003070.5(SMARCA2):​c.3602C>T​(p.Ala1201Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SMARCA2 NM_003070.5 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4 O:1
• Conservation: PhyloP100: 7.91

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]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PM1: In a domain Helicase C-terminal (size 162) in uniprot entity SMCA2_HUMAN there are 25 pathogenic changes around while only 0 benign (100%) in NM_003070.5
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SMARCA2. . Gene score misZ 5.054 (greater than the threshold 3.09). Trascript score misZ 4.663 (greater than threshold 3.09). GenCC has associacion of gene with intellectual disability-sparse hair-brachydactyly syndrome, Coffin-Siris syndrome 1.
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 9-2115967-C-T is Pathogenic according to our data. Variant chr9-2115967-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 30017.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr9-2115967-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMARCA2	NM_003070.5	c.3602C>T	p.Ala1201Val	missense_variant	25/34	ENST00000349721.8	NP_003061.3
SMARCA2	NM_001289396.1	c.3602C>T	p.Ala1201Val	missense_variant	25/34		NP_001276325.1
SMARCA2	NM_139045.4	c.3602C>T	p.Ala1201Val	missense_variant	25/33		NP_620614.2
SMARCA2	NM_001289397.2	c.3428C>T	p.Ala1143Val	missense_variant	25/33		NP_001276326.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SMARCA2	ENST00000349721.8	c.3602C>T	p.Ala1201Val	missense_variant	25/34	5	NM_003070.5	ENSP00000265773	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1461830 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727216

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.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:1 Other:1

not provided, no classification provided	literature only	UniProtKB/Swiss-Prot	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Oct 12, 2021	In silico analysis supports that this variant has a deleterious effect on splicing; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 22366787, 25169058, 24090879, 30459321) -

Nicolaides-Baraitser syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Feb 26, 2012

- -

Hirsutism;C3714756:Intellectual disability Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Autoinflammatory diseases unit, CHU de Montpellier

Sep 26, 2019

- -

Intellectual disability Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Diagnostic Laboratory, Strasbourg University Hospital

Sep 10, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.47	D
BayesDel_noAF	Pathogenic	0.44
CADD	Pathogenic	35
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.76	.;.;D;.;D
Eigen	Pathogenic	0.87
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.99	.;D;.;D;D
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.78	D;D;D;D;D
MetaSVM	Pathogenic	0.85	D
MutationAssessor	Uncertain	2.8	M;.;M;M;M
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Uncertain	-3.6	D;.;D;D;D
REVEL	Pathogenic	0.79
Sift	Pathogenic	0.0	D;.;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D
Polyphen		1.0	D;.;D;D;D
Vest4		0.87
MutPred		0.41		Loss of catalytic residue at A1201 (P = 0.0697);.;Loss of catalytic residue at A1201 (P = 0.0697);Loss of catalytic residue at A1201 (P = 0.0697);Loss of catalytic residue at A1201 (P = 0.0697);
MVP		0.98
MPC		2.0
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.71
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.74		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.74		Position offset: -2

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

Publications

LitVar

Other links and lift over

dbSNP: rs281875189; hg19: chr9-2115967;