1-237801833-ATTTTT-AT

Variant names:

• chr1-237801833-ATTTT-A
• rs35563566
• NM_001035.3:c.14091-14_14091-11delTTTT

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001035.3(RYR2):​c.14091-14_14091-11delTTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,217,996 control chromosomes in the GnomAD database, with no homozygous occurrence. There is a variant allele frequency bias in the population database for this variant (GnomAdExome4), which may indicate mosaicism or somatic mutations in the reference population data. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 0)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: RYR2 NM_001035.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.07
• Publications: 0 publications found

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]

RYR2 Gene-Disease associations (from GenCC):

• arrhythmogenic right ventricular dysplasia 2

  Inheritance: AD Classification: DEFINITIVE, NO_KNOWN Submitted by: Laboratory for Molecular Medicine, Ambry Genetics
• catecholaminergic polymorphic ventricular tachycardia

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P
• catecholaminergic polymorphic ventricular tachycardia 1

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• hypertrophic cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• arrhythmogenic right ventricular cardiomyopathy

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 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
RYR2	NM_001035.3	c.14091-14_14091-11delTTTT		intron_variant	Intron 97 of 104	ENST00000366574.7	NP_001026.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RYR2	ENST00000366574.7	c.14091-22_14091-19delTTTT		intron_variant	Intron 97 of 104	1	NM_001035.3	ENSP00000355533.2
RYR2	ENST00000661330.2	c.14109-22_14109-19delTTTT		intron_variant	Intron 98 of 105			ENSP00000499393.2
RYR2	ENST00000609119.2	n.*5183-22_*5183-19delTTTT		intron_variant	Intron 96 of 103	5		ENSP00000499659.2

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD4 exome AF: 0.00000411 AC: 5 AN: 1217996 Hom.: 0 AF XY: 0.00000329 AC XY: 2 AN XY: 608260

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 28124

American (AMR) AF: 0.00 AC: 0 AN: 38822

Ashkenazi Jewish (ASJ) AF: 0.0000441 AC: 1 AN: 22684

East Asian (EAS) AF: 0.00 AC: 0 AN: 36188

South Asian (SAS) AF: 0.00 AC: 0 AN: 72838

European-Finnish (FIN) AF: 0.0000245 AC: 1 AN: 40782

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4992

European-Non Finnish (NFE) AF: 0.00000325 AC: 3 AN: 922294

Other (OTH) AF: 0.00 AC: 0 AN: 51272

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs35563566; hg19: chr1-237965133;