1-237610812-C-T

Position:

• chr1-237610812-C-T

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_Strong BP6 BP7 BS2

The NM_001035.3(RYR2):​c.4734C>T​(p.Pro1578=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000529 in 1,611,408 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. P1578P) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.00066 (1 hom., cov: 32)
  • Exomes 𝑓: 0.00052 (1 hom.)
• Consequence: RYR2 NM_001035.3 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:9
• Conservation: PhyloP100: -6.97

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 Benign. Variant got -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.68).
• BP6: Variant 1-237610812-C-T is Benign according to our data. Variant chr1-237610812-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 43794.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=1, Benign=6}.
• BP7: Synonymous conserved (PhyloP=-6.97 with no splicing effect.
• BS2: High AC in GnomAd4 at 100 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RYR2	NM_001035.3	c.4734C>T	p.Pro1578=	synonymous_variant	36/105	ENST00000366574.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RYR2	ENST00000366574.7	c.4734C>T	p.Pro1578=	synonymous_variant	36/105	1	NM_001035.3	P1
RYR2	ENST00000660292.2	c.4734C>T	p.Pro1578=	synonymous_variant	36/106
RYR2	ENST00000659194.3	c.4734C>T	p.Pro1578=	synonymous_variant	36/105
RYR2	ENST00000609119.2	c.4734C>T	p.Pro1578=	synonymous_variant, NMD_transcript_variant	36/104	5

Frequencies

GnomAD3 genomes AF: 0.000657 AC: 100 AN: 152144 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

Gnomad ASJ AF: 0.0193

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000382

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000938 AC: 230 AN: 245088 Hom.: 0 AF XY: 0.000918 AC XY: 122 AN XY: 132940

Gnomad AFR exome AF: 0.0000667

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.0176

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000667

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000351

Gnomad OTH exome AF: 0.00218

GnomAD4 exome AF: 0.000516 AC: 753 AN: 1459264 Hom.: 1 Cov.: 31 AF XY: 0.000551 AC XY: 400 AN XY: 725732

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.0180

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000117

Gnomad4 FIN exome AF: 0.0000188

Gnomad4 NFE exome AF: 0.000149

Gnomad4 OTH exome AF: 0.00176

GnomAD4 genome AF: 0.000657 AC: 100 AN: 152144 Hom.: 1 Cov.: 32 AF XY: 0.000565 AC XY: 42 AN XY: 74330

Gnomad4 AFR AF: 0.0000483

Gnomad4 AMR AF: 0.000196

Gnomad4 ASJ AF: 0.0193

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000208

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000382

Gnomad4 OTH AF: 0.000478

Alfa AF: 0.00152 Hom.: 0

Bravo AF: 0.000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:9

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not specified Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	May 17, 2012	Pro1578Pro in exon 36 of RYR2: This variant is not expected to have clinical sig nificance because it does not alter an amino acid residue and is not located wit hin the splice consensus sequence. It has been identified in 4/6620 European Ame rican chromosomes from a broad population by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu/EVS/). Pro1578Pro in exon 36 of RYR2 (allele fr equency = 4/6620) ** -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 17, 2015	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

not provided Benign:2

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2024	RYR2: BP4, BP7 -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Feb 03, 2017	Variant summary: The RYR2 c.4734C>T (p.Pro1578Pro) variant involves the alteration of a non-conserved nucleotide, resulting in a synonymous change. One in silico tool predicts a damaging outcome for this variant. 3/5 splice prediction tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. This variant was found in 80/89090 control chromosomes, predominantly observed in the European (Non-Finnish) subpopulation at a frequency of 0.001592 (79/49632). This frequency is about 29 times the estimated maximal expected allele frequency of a pathogenic RYR2 variant (0.000055), suggesting this is likely a benign polymorphism found primarily in the populations of European (Non-Finnish) origin. In addition, one clinical diagnostic laboratory/reputable database classified this variant as likely benign. The variant of interest has not, to our knowledge, been reported in affected individuals via publications nor evaluated for functional impact by in vivo/vitro studies. Taken together, due to the synonymous nature of this variant, the lack of predicted effect on splicing, and the relatively high frequency in the control population, this variant is classified as benign. -

Catecholaminergic polymorphic ventricular tachycardia 1 Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Arrhythmogenic right ventricular dysplasia 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Catecholaminergic polymorphic ventricular tachycardia Benign:1

Benign, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Feb 05, 2024

- -

Cardiomyopathy Benign:1

Benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Mar 23, 2018

- -

Cardiovascular phenotype Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 21, 2015

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.68
CADD	Benign	0.0080
DANN	Benign	0.75

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs201880756; hg19: chr1-237774112;