rs876657970

chr10-110781622-T-Cchr10-110781622-T-G

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_Moderate BP6

The NM_001134363.3(RBM20):c.1013T>C(p.Met338Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000165 in 1,398,132 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M338V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000016 (0 hom.)
• Consequence: RBM20 NM_001134363.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:2
• Conservation: PhyloP100: 1.62

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 -3 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.1529294).
• BP6: Variant 10-110781622-T-C is Benign according to our data. Variant chr10-110781622-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 229181.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RBM20	NM_001134363.3	c.1013T>C	p.Met338Thr	missense_variant	2/14	ENST00000369519.4
RBM20	XM_017016103.3	c.848T>C	p.Met283Thr	missense_variant	2/14
RBM20	XM_017016104.3	c.629T>C	p.Met210Thr	missense_variant	2/14
RBM20	XM_047425116.1	c.629T>C	p.Met210Thr	missense_variant	2/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RBM20	ENST00000369519.4	c.1013T>C	p.Met338Thr	missense_variant	2/14	1	NM_001134363.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000129 AC: 2 AN: 155224 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 82312

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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000336

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000165 AC: 23 AN: 1398132 Hom.: 0 Cov.: 32 AF XY: 0.0000160 AC XY: 11 AN XY: 689342

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: 0.0000195

Gnomad4 OTH exome AF: 0.0000345

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Primary dilated cardiomyopathy Uncertain:1 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Center for Advanced Laboratory Medicine, UC San Diego Health, University of California San Diego	May 14, 2019	- -
Uncertain significance, no assertion criteria provided	research	University of Washington Center for Mendelian Genomics, University of Washington	-	- -

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jun 22, 2015

The p.Met338Thr variant in RBM20 has not been previously reported in individuals with cardiomyopathy and was absent from large population studies. Computational prediction tools and conservation analysis suggest that the p.Met338Thr variant may not impact the protein, though this information is not predictive enough to rule out pathogenicity. In summary, the clinical significance of the p.Met338Th r variant is uncertain. -

Cardiovascular phenotype Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 02, 2023

The p.M338T variant (also known as c.1013T>C), located in coding exon 2 of the RBM20 gene, results from a T to C substitution at nucleotide position 1013. The methionine at codon 338 is replaced by threonine, an amino acid with similar properties. This variant co-occurred with a TTN A-band truncating variant and variants in other cardiac-related genes in two affected individuals from a family with dilated cardiomyopathy (Cowan JR et al. Circ Genom Precis Med, 2018 Jul;11:e002038). This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Dilated cardiomyopathy 1DD Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 04, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.037	T
BayesDel_noAF	Benign	-0.19
Cadd	Benign	19
Dann	Uncertain	0.98
Eigen	Benign	-0.37
Eigen_PC	Benign	-0.18
FATHMM_MKL	Uncertain	0.84	D
M_CAP	Benign	0.038	D
MetaRNN	Benign	0.15	T
MetaSVM	Benign	-0.69	T
MutationTaster	Benign	0.98	N
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-0.74	N
REVEL	Benign	0.24
Sift	Uncertain	0.0020	D
Sift4G	Benign	0.44	T
Vest4		0.30
MutPred		0.11		Gain of glycosylation at M338 (P = 9e-04);
MVP		0.36
ClinPred		0.19	T
GERP RS		4.6
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: rs876657970; hg19: chr10-112541380;