chr3-47622221-T-C

Position:

• chr3-47622221-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_003074.4(SMARCC1):​c.2767A>G​(p.Arg923Gly) variant causes a missense change involving the alteration of a non-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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SMARCC1 NM_003074.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.479

Genes affected

SMARCC1 (HGNC:11104): (SWI/SNF related, matrix associated, actin dependent regulator of chromatin subfamily c member 1) The protein encoded by this gene is a member of the SWI/SNF family of proteins, whose members display helicase and ATPase activities and which 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 and contains a predicted leucine zipper motif typical of many transcription factors. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.845

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMARCC1	NM_003074.4	c.2767A>G	p.Arg923Gly	missense_variant	25/28	ENST00000254480.10	NP_003065.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SMARCC1	ENST00000254480.10	c.2767A>G	p.Arg923Gly	missense_variant	25/28	1	NM_003074.4	ENSP00000254480.5
SMARCC1	ENST00000425518.5	n.2657A>G		non_coding_transcript_exon_variant	25/28	2

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

SMARCC1-related disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

May 15, 2023

The SMARCC1 c.2767A>G variant is predicted to result in the amino acid substitution p.Arg923Gly. To our knowledge, this variant has not been reported in the literature or in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.74	D
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Benign	0.067	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Benign	-0.74	T
MutationAssessor	Uncertain	2.5	M
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-6.3	D
REVEL	Uncertain	0.34
Sift	Uncertain	0.0050	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.85
MutPred		0.25		Gain of glycosylation at T919 (P = 0.0473);
MVP		0.76
MPC		1.1
ClinPred		0.97	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.73
gMVP		0.73

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: rs1277005296; hg19: chr3-47663711;