Genetic Variant SMARCA2:p.Asp1573His (chr9-2191388-G-C) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4

The NM_003070.5(SMARCA2):c.4717G>C(p.Asp1573His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000372 in 1,614,042 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D1573N) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

SMARCA2
NM_003070.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 8.15

Publications

7 publications found

Variant links:

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

SMARCA2 links:

ENSG00000306181 (HGNC:):

ENSG00000306181 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.26673543).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCA2	NM_003070.5 link	c.4717G>C	p.Asp1573His	missense_variant	Exon 33 of 34	ENST00000349721.8	NP_003061.3	P51531-1Q8N9Q1Q56A76

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCA2	ENST00000349721.8 link	c.4717G>C	p.Asp1573His	missense_variant	Exon 33 of 34	5	NM_003070.5	ENSP00000265773.5		P51531-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152242

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461800

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727206

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111960

Other (OTH)

AF:

0.00

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74384

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41458

American (AMR)

AF:

0.00

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68048

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.38

BayesDel_addAF

Uncertain

0.14

BayesDel_noAF

Uncertain

-0.040

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.61

.;.;D;.;D;.;.;T;.;.;T;.;T

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.96

.;D;.;D;D;D;.;.;D;D;D;D;D

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.27

T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.42

MutationAssessor

Benign

1.8

.;.;L;.;L;.;.;.;.;.;.;.;.

PhyloP100

8.2

PrimateAI

Uncertain

0.75

PROVEAN

Uncertain

-3.0

D;.;D;D;D;.;.;.;D;D;D;D;.

REVEL

Benign

0.23

Sift

Uncertain

0.0020

D;.;D;D;D;.;.;.;D;D;D;D;.

Sift4G

Uncertain

0.0030

D;D;D;D;D;D;D;D;D;D;D;D;D

Polyphen

0.73

P;.;P;P;P;.;.;P;P;.;P;.;.

Vest4

0.49

MutPred

0.15

.;.;Gain of sheet (P = 0.1208);.;Gain of sheet (P = 0.1208);.;.;.;.;.;.;.;.;

MVP

0.78

MPC

0.17

ClinPred

0.94

GERP RS

5.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.33

gMVP

0.18

Mutation Taster

=33/67

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over