9-2060894-G-T

Position:

• chr9-2060894-G-T

Variant summary

Our verdict is Pathogenic. Variant got 13 ACMG points: 13P and 0B. PM2 PP2 PP3_Moderate PP5_Very_Strong

The NM_003070.5(SMARCA2):​c.1600G>T​(p.Asp534Tyr) 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 Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SMARCA2 NM_003070.5 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 10.0

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 13 ACMG points.

• 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). The gene has 93 curated pathogenic missense variants (we use a threshold of 10). The gene has 88 curated benign missense variants. GenCC has associacion of the gene with intellectual disability-sparse hair-brachydactyly syndrome, Coffin-Siris syndrome 1.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.864
• PP5: Variant 9-2060894-G-T is Pathogenic according to our data. Variant chr9-2060894-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 217002.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMARCA2	NM_003070.5	c.1600G>T	p.Asp534Tyr	missense_variant	9/34	ENST00000349721.8	NP_003061.3
SMARCA2	NM_001289396.2	c.1600G>T	p.Asp534Tyr	missense_variant	9/34		NP_001276325.1
SMARCA2	NM_139045.4	c.1600G>T	p.Asp534Tyr	missense_variant	9/33		NP_620614.2
SMARCA2	NM_001289397.2	c.1600G>T	p.Asp534Tyr	missense_variant	9/33		NP_001276326.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SMARCA2	ENST00000349721.8	c.1600G>T	p.Asp534Tyr	missense_variant	9/34	5	NM_003070.5	ENSP00000265773.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Nicolaides-Baraitser syndrome Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

UCLA Clinical Genomics Center, UCLA

Jul 22, 2014

- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Oct 20, 2022

Not observed at significant frequency in large population cohorts (gnomAD); 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: 25326637) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.25
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.80	.;.;D;.;D
Eigen	Pathogenic	0.96
Eigen_PC	Pathogenic	0.89
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	.;D;.;D;D
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.86	D;D;D;D;D
MetaSVM	Uncertain	-0.0040	T
MutationAssessor	Uncertain	2.8	M;.;M;M;M
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-8.2	D;D;D;D;D
REVEL	Uncertain	0.64
Sift	Pathogenic	0.0	D;D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D
Polyphen		1.0	D;.;D;D;D
Vest4		0.93
MutPred		0.47		Gain of MoRF binding (P = 0.0432);Gain of MoRF binding (P = 0.0432);Gain of MoRF binding (P = 0.0432);Gain of MoRF binding (P = 0.0432);Gain of MoRF binding (P = 0.0432);
MVP		0.82
MPC		2.7
ClinPred		1.0	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.95
gMVP		0.93

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

LitVar

Other links and lift over

dbSNP: rs863224922; hg19: chr9-2060894;