22-23791772-G-C

Variant names:

• chr22-23791772-G-C
• rs398122368
• NM_003073.5:c.110G>C

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PM5 PP3_Moderate

The NM_003073.5(SMARCB1):​c.110G>C​(p.Arg37Pro) 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 other (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R37H) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: SMARCB1 NM_003073.5 missense
• Clinical Significance: - - O:1
• Conservation: PhyloP100: 9.70

Genes affected

SMARCB1 (HGNC:11103): (SWI/SNF related, matrix associated, actin dependent regulator of chromatin, subfamily b, member 1) The protein encoded by this gene is part of a complex that relieves repressive chromatin structures, allowing the transcriptional machinery to access its targets more effectively. The encoded nuclear protein may also bind to and enhance the DNA joining activity of HIV-1 integrase. This gene has been found to be a tumor suppressor, and mutations in it have been associated with malignant rhabdoid tumors. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Dec 2015]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a region_of_interest DNA-binding (size 112) in uniprot entity SNF5_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_003073.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr22-23791772-G-A is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.873

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMARCB1	NM_003073.5	c.110G>C	p.Arg37Pro	missense_variant	Exon 2 of 9	ENST00000644036.2	NP_003064.2
SMARCB1	NM_001362877.2	c.110G>C	p.Arg37Pro	missense_variant	Exon 2 of 9		NP_001349806.1
SMARCB1	NM_001317946.2	c.110G>C	p.Arg37Pro	missense_variant	Exon 2 of 9		NP_001304875.1
SMARCB1	NM_001007468.3	c.110G>C	p.Arg37Pro	missense_variant	Exon 2 of 9		NP_001007469.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMARCB1	ENST00000644036.2	c.110G>C	p.Arg37Pro	missense_variant	Exon 2 of 9		NM_003073.5	ENSP00000494049.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: -

Submissions summary: Other:1

Revision: -

Submissions by phenotype

Adenoid cystic carcinoma Other:1

Nov 13, 2024

Genome Sciences Centre, British Columbia Cancer Agency

Significance: -

Review Status: no assertion criteria provided

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.80	.;D;T;.;.;T
Eigen	Pathogenic	0.94
Eigen_PC	Pathogenic	0.92
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.98	.;.;.;.;D;D
M_CAP	Uncertain	0.28	D
MetaRNN	Pathogenic	0.87	D;D;D;D;D;D
MetaSVM	Pathogenic	0.99	D
MutationAssessor	Uncertain	2.5	M;M;.;.;.;.
PrimateAI	Pathogenic	0.91	D
PROVEAN	Uncertain	-4.3	D;.;D;D;D;D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.0080	D;.;D;D;D;D
Sift4G	Uncertain	0.0040	D;.;D;D;D;D
Polyphen		1.0, 1.0, 1.0	.;D;D;.;.;D
Vest4		0.95
MutPred		0.51		Loss of MoRF binding (P = 0.0011);Loss of MoRF binding (P = 0.0011);Loss of MoRF binding (P = 0.0011);Loss of MoRF binding (P = 0.0011);Loss of MoRF binding (P = 0.0011);Loss of MoRF binding (P = 0.0011);
MVP		0.99
MPC		3.1
ClinPred		1.0	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.97
gMVP		0.99

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.12		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: rs398122368; hg19: chr22-24133959;