rs868071612

Positions:

• chr1-237783947-G-A
• chr1-237783947-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_001035.3(RYR2):​c.12235G>A​(p.Asp4079Asn) 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 benign outcome for this variant. 14/21 in silico tools predict 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. D4079Y) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RYR2 NM_001035.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.06

Genes affected

RYR2 (HGNC:10484): (ryanodine receptor 2) This gene encodes a ryanodine receptor found in cardiac muscle sarcoplasmic reticulum. The encoded protein is one of the components of a calcium channel, composed of a tetramer of the ryanodine receptor proteins and a tetramer of FK506 binding protein 1B proteins, that supplies calcium to cardiac muscle. Mutations in this gene are associated with stress-induced polymorphic ventricular tachycardia and arrhythmogenic right ventricular dysplasia. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, RYR2
• BP4: Computational evidence support a benign effect (MetaRNN=0.29087692).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RYR2	NM_001035.3	c.12235G>A	p.Asp4079Asn	missense_variant	90/105	ENST00000366574.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RYR2	ENST00000366574.7	c.12235G>A	p.Asp4079Asn	missense_variant	90/105	1	NM_001035.3	P1
RYR2	ENST00000660292.2	c.12256G>A	p.Asp4086Asn	missense_variant	91/106
RYR2	ENST00000659194.3	c.12223G>A	p.Asp4075Asn	missense_variant	90/105
RYR2	ENST00000609119.2	c.*3327G>A		3_prime_UTR_variant, NMD_transcript_variant	89/104	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Catecholaminergic polymorphic ventricular tachycardia 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Apr 14, 2021

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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C15"). This variant has not been reported in the literature in individuals with RYR2-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces aspartic acid with asparagine at codon 4079 of the RYR2 protein (p.Asp4079Asn). The aspartic acid residue is highly conserved and there is a small physicochemical difference between aspartic acid and asparagine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.067	T
BayesDel_noAF	Benign	-0.33
CADD	Benign	22
DANN	Benign	0.57
DEOGEN2	Benign	0.37	T;T
Eigen	Benign	-0.22
Eigen_PC	Benign	-0.021
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Benign	0.034	D
MetaRNN	Benign	0.29	T;T
MetaSVM	Benign	-0.65	T
MutationAssessor	Benign	0.0	N;.
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	0.67	N;.
REVEL	Uncertain	0.33
Sift	Benign	0.55	T;.
Polyphen		0.15	B;.
Vest4		0.38
MutPred		0.39		Gain of helix (P = 0.0496);.;
MVP		0.66
MPC		0.83
ClinPred		0.41	T
GERP RS		5.8
Varity_R		0.10
gMVP		0.62

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: rs868071612; hg19: chr1-237947247;