10-110644497-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_001134363.3(RBM20):c.43G>A(p.Gly15Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000583 in 1,371,370 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G15R) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000058 (0 hom.)
• Consequence: RBM20 NM_001134363.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.334

Genes affected

RBM20 (HGNC:27424): (RNA binding motif protein 20) This gene encodes a protein that binds RNA and regulates splicing. Mutations in this gene have been associated with familial dilated cardiomyopathy. [provided by RefSeq, Apr 2014]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.28161204).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RBM20	NM_001134363.3	c.43G>A	p.Gly15Ser	missense_variant	1/14	ENST00000369519.4
RBM20	XM_017016103.3	c.26+1057G>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RBM20	ENST00000369519.4	c.43G>A	p.Gly15Ser	missense_variant	1/14	1	NM_001134363.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000170 AC: 2 AN: 117656 Hom.: 0 AF XY: 0.0000308 AC XY: 2 AN XY: 64936

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000491

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000232

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000583 AC: 8 AN: 1371370 Hom.: 0 Cov.: 31 AF XY: 0.00000739 AC XY: 5 AN XY: 676434

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: 0.00000747

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Dilated cardiomyopathy 1DD Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Feb 13, 2017

In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Not Scored"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). While this variant is not present in population databases (no rsID), the frequency information is unreliable, as metrics indicate poor data quality at this position in the ExAC database. This variant has not been reported in the literature in individuals with a RBM20-related disease. This sequence change replaces glycine with serine at codon 15 of the RBM20 protein (p.Gly15Ser). The glycine residue is weakly conserved and there is a small physicochemical difference between glycine and serine. -

Cardiovascular phenotype Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 27, 2024

The p.G15S variant (also known as c.43G>A), located in coding exon 1 of the RBM20 gene, results from a G to A substitution at nucleotide position 43. The glycine at codon 15 is replaced by serine, an amino acid with similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.038	T
BayesDel_noAF	Uncertain	-0.040
Cadd	Uncertain	24
Dann	Uncertain	1.0
Eigen	Benign	-0.061
Eigen_PC	Benign	0.0086
FATHMM_MKL	Benign	0.54	D
M_CAP	Pathogenic	0.97	D
MetaRNN	Benign	0.28	T
MetaSVM	Benign	-0.35	T
MutationTaster	Benign	0.97	N
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	-0.57	N
REVEL	Uncertain	0.41
Sift	Pathogenic	0.0	D
Sift4G	Benign	1.0	T
Vest4		0.29
MutPred		0.15		Gain of phosphorylation at G15 (P = 0.005);
MVP		0.64
ClinPred		0.45	T
GERP RS		3.3
gMVP		0.17

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: rs559040957; hg19: chr10-112404255;