dbSNP rs397516600: RBM20:p.Arg703Lys (chr10-110812505-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001134363.3(RBM20):c.2108G>A(p.Arg703Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000193 in 1,551,582 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

RBM20
NM_001134363.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 7.44

Variant links:

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]

RBM20 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RBM20	NM_001134363.3 link	c.2108G>A	p.Arg703Lys	missense_variant	Exon 9 of 14	ENST00000369519.4	NP_001127835.2	Q5T481
RBM20	XM_017016103.3 link	c.1943G>A	p.Arg648Lys	missense_variant	Exon 9 of 14		XP_016871592.1
RBM20	XM_017016104.3 link	c.1724G>A	p.Arg575Lys	missense_variant	Exon 9 of 14		XP_016871593.1
RBM20	XM_047425116.1 link	c.1724G>A	p.Arg575Lys	missense_variant	Exon 9 of 14		XP_047281072.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RBM20	ENST00000369519.4 link	c.2108G>A	p.Arg703Lys	missense_variant	Exon 9 of 14	1	NM_001134363.3	ENSP00000358532.3		Q5T481

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000143

AC:

AN:

1399410

Hom.:

Cov.:

AF XY:

0.00000145

AC XY:

AN XY:

690214

show subpopulations

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:

0.00000185

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 09, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Pathogenic. The Arg703Lys v ariant in RBM20 has not been reported in the literature nor previously identifie d by our laboratory. This variant has also not been identified in a large and br oad population by the NHLBI Exome Sequencing Project (http://evs.gs.washington.e du/EVS). This low frequency is consistent with a disease causing role, but insuf ficient to establish this with confidence. In addition, this variant lies within exon 9, which encodes a conserved protein domain where other pathogenic variant s have been reported (Brauch 2009, Li 2010). A different variant at the same pos ition (Arg703Ser) has been identified in an African American individual with DCM and atrial fibrillation, and was absent from 1000 Caucasian and 200 African Ame rican control chromosomes (Refaat 2012). Collectively, this data suggests that t he Arg703Lys variant may be pathogenic but additional studies are needed to full y assess its clinical significance. -

Cardiomyopathy

Uncertain:1

Oct 01, 2021

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dilated cardiomyopathy 1DD

Uncertain:1

Dec 14, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt RBM20 protein function. ClinVar contains an entry for this variant (Variation ID: 43985). This missense change has been observed in individual(s) with dilated cardiomyopathy (PMID: 24503780, 27532257). This variant is present in population databases (rs397516600, gnomAD 0.007%). This sequence change replaces arginine, which is basic and polar, with lysine, which is basic and polar, at codon 703 of the RBM20 protein (p.Arg703Lys). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Uncertain

0.031

BayesDel_noAF

Benign

-0.19

CADD

Uncertain

DANN

Uncertain

1.0

Eigen

Pathogenic

0.72

Eigen_PC

Pathogenic

0.70

FATHMM_MKL

Uncertain

0.96

M_CAP

Uncertain

0.11

MetaRNN

Uncertain

0.67

MetaSVM

Uncertain

0.30

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-1.3

REVEL

Uncertain

0.33

Sift

Uncertain

0.0020

Sift4G

Uncertain

0.058

Vest4

0.62

MutPred

0.30

Gain of ubiquitination at R703 (P = 0.0104);

MVP

0.66

ClinPred

0.94

GERP RS

5.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

gMVP

0.58

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over