19-38505923-C-T

Variant names:

Variant summary

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

This summary comes from the ClinGen Evidence Repository: This pathogenicity assessment is relevant only for malignant hyperthermia susceptibility (MHS) inherited in an autosomal dominant pattern. Variants in RYR1 can also cause other myopathies inherited in an autosomal dominant pattern or in an autosomal recessive pattern. Some of these disorders may predispose individuals to malignant hyperthermia. RYR1 variants may also contribute to a malignant hyperthermia reaction in combination with other genetic and non-genetic factors and the clinician needs to consider such factors in making management decisions.This sequence variant predicts a substitution of arginine with tryptophan at codon 2840 of the RYR1 protein, p.(Arg2840Trp). The maximum allele frequency for this variant among the six major gnomAD populations is SAS: 0.000131, a frequency consistent with pathogenicity for MHS. This variant has been reported in an individual with a personal or family history of an MH episode without a positive in vitro contracture test (IVCT) or caffeine halothane contracture test (CHCT) result (if the proband was unavailable for testing, a positive diagnostic test result in a mutation-positive relative was counted), PS4 not implemented (PMID:16732084). No functional studies were identified for this variant. This variant does not reside in a hotspot for pathogenic variants that contribute to MHS. A REVEL score of 0.659 supports neither a pathogenic nor a benign status for this variant. This variant has been classified as a Variant of Unknown Significance. No criteria implemented. LINK:https://erepo.genome.network/evrepo/ui/classification/CA024925/MONDO:0018493/012

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000029 ( 0 hom. )

Consequence

RYR1
NM_000540.3 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel P:1U:4O:1

Conservation

PhyloP100: 0.266

Variant links:

Genes affected

RYR1 (HGNC:10483): (ryanodine receptor 1) This gene encodes a ryanodine receptor found in skeletal muscle. The encoded protein functions as a calcium release channel in the sarcoplasmic reticulum but also serves to connect the sarcoplasmic reticulum and transverse tubule. Mutations in this gene are associated with malignant hyperthermia susceptibility, central core disease, and minicore myopathy with external ophthalmoplegia. Alternatively spliced transcripts encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

RYR1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RYR1	NM_000540.3 link	c.8518C>T	p.Arg2840Trp	missense_variant	Exon 54 of 106	ENST00000359596.8	NP_000531.2	P21817-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
RYR1	ENST00000359596.8 link	c.8518C>T	p.Arg2840Trp	missense_variant	Exon 54 of 106	5	NM_000540.3	ENSP00000352608.2	P21817-1
RYR1	ENST00000355481.8 link	c.8518C>T	p.Arg2840Trp	missense_variant	Exon 54 of 105	1		ENSP00000347667.3	P21817-2
RYR1	ENST00000594335.5 link	n.1969C>T		non_coding_transcript_exon_variant	Exon 15 of 49	1		ENSP00000470927.2	M0R014
RYR1	ENST00000599547.6 link	n.8518C>T		non_coding_transcript_exon_variant	Exon 54 of 80	2		ENSP00000471601.2	M0R127

Frequencies

GnomAD3 genomes

AF:

0.0000198

AC:

AN:

151510

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:

0.000194

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000160

AC:

AN:

250070

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

135402

show subpopulations

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:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000287

AC:

AN:

1461468

Hom.:

Cov.:

AF XY:

0.0000413

AC XY:

AN XY:

726994

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000162

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000198

AC:

AN:

151510

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73952

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000194

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000160

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.0000165

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:4Other:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Central core myopathy

Pathogenic:1

Oct 02, 2021

Foundation for Research in Genetics and Endocrinology, FRIGE's Institute of Human Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

A heterozygous missense variation in exon 54 of the RYR1 gene that results in the amino acid substitution of Tryptophan for Arginine at codon 2840 was detected. The observed variant c.8518C>T (p.Arg2840Trp) has not been reported in the 1000 genomes and has minor allele frequency of 0.001% gnomAD database. The in silico prediction of the variant are possibly damaging by PolyPhen-2 (HumDiv) and damaging by MutationTaster2 and SIFT. The reference codon is conserved across species. In summary, the variant meets our criteria to be classified as a likely pathogenic variant. -

RYR1-related disorder

Uncertain:1

Nov 18, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 2840 of the RYR1 protein (p.Arg2840Trp). This variant is present in population databases (rs193922830, gnomAD 0.01%). This missense change has been observed in individual(s) with malignant hyperthermia (PMID: 16732084, 16917943). ClinVar contains an entry for this variant (Variation ID: 133226). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt RYR1 protein function with a negative predictive value of 80%. This variant disrupts the p.Arg2840 amino acid residue in RYR1. Other variant(s) that disrupt this residue have been observed in individuals with RYR1-related conditions (PMID: 16732084, 35178478), which suggests that this may be a clinically significant amino acid residue. 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. -

Malignant hyperthermia, susceptibility to, 1

Uncertain:1

Jun 11, 2024

All of Us Research Program, National Institutes of Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Malignant hyperthermia of anesthesia

Uncertain:1

Apr 06, 2023

ClinGen Malignant Hyperthermia Susceptibility Variant Curation Expert Panel, ClinGen

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

This pathogenicity assessment is relevant only for malignant hyperthermia susceptibility (MHS) inherited in an autosomal dominant pattern. Variants in RYR1 can also cause other myopathies inherited in an autosomal dominant pattern or in an autosomal recessive pattern. Some of these disorders may predispose individuals to malignant hyperthermia. RYR1 variants may also contribute to a malignant hyperthermia reaction in combination with other genetic and non-genetic factors and the clinician needs to consider such factors in making management decisions. This sequence variant predicts a substitution of arginine with tryptophan at codon 2840 of the RYR1 protein, p.(Arg2840Trp). The maximum allele frequency for this variant among the six major gnomAD populations is SAS: 0.000131, a frequency consistent with pathogenicity for MHS. This variant has been reported in an individual with a personal or family history of an MH episode without a positive in vitro contracture test (IVCT) or caffeine halothane contracture test (CHCT) result (if the proband was unavailable for testing, a positive diagnostic test result in a mutation-positive relative was counted), PS4 not implemented (PMID:16732084). No functional studies were identified for this variant. This variant does not reside in a hotspot for pathogenic variants that contribute to MHS. A REVEL score of 0.659 supports neither a pathogenic nor a benign status for this variant. This variant has been classified as a Variant of Unknown Significance. No criteria implemented. -

Congenital myopathy with fiber type disproportion;C1840365:King Denborough syndrome;C1850674:Congenital multicore myopathy with external ophthalmoplegia;C2930980:Malignant hyperthermia, susceptibility to, 1;C5830701:Central core myopathy

Uncertain:1

Aug 27, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Other:1

RYR1 database

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.59

BayesDel_addAF

Pathogenic

0.31

BayesDel_noAF

Pathogenic

0.44

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.84

.;D

Eigen

Benign

-0.58

Eigen_PC

Benign

-0.88

FATHMM_MKL

Benign

0.36

LIST_S2

Pathogenic

0.99

D;D

M_CAP

Pathogenic

0.41

MetaRNN

Pathogenic

0.84

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

2.9

M;M

PrimateAI

Uncertain

0.75

PROVEAN

Pathogenic

-7.0

D;D

REVEL

Pathogenic

0.66

Sift

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.68

MVP

0.94

MPC

0.58

ClinPred

0.84

GERP RS

-3.8

Varity_R

0.70

gMVP

0.77

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

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