19-38502679-C-T

Position:

chr19-38502679-C-T

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 threonine with isoleucine at codon 2596 of the RYR1 protein, p.(Thr2596Ile). The maximum allele frequency for this variant among the six major gnomAD populations is AMR: 0.000145, 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, PS4 not implemented (PMID:16917943). 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 0.822 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/CA024853/MONDO:0018493/012

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 28)

Exomes 𝑓: 0.0000069 ( 0 hom. )

Consequence

RYR1
NM_000540.3 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel U:5O:1

Conservation

PhyloP100: 7.85

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/exons	MANE	UniProt
RYR1	NM_000540.3 linkuse as main transcript	c.7787C>T	p.Thr2596Ile	missense_variant	48/106	ENST00000359596.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RYR1	ENST00000359596.8 linkuse as main transcript	c.7787C>T	p.Thr2596Ile	missense_variant	48/106	5	NM_000540.3	A2	P21817-1
RYR1	ENST00000355481.8 linkuse as main transcript	c.7787C>T	p.Thr2596Ile	missense_variant	48/105	1		P4	P21817-2
RYR1	ENST00000594335.5 linkuse as main transcript	c.1241C>T	p.Thr414Ile	missense_variant, NMD_transcript_variant	9/49	1
RYR1	ENST00000599547.6 linkuse as main transcript	c.7787C>T	p.Thr2596Ile	missense_variant, NMD_transcript_variant	48/80	2

Frequencies

GnomAD3 genomes

AF:

0.00000662

AC:

AN:

151110

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:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000148

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000241

AC:

AN:

249306

Hom.:

AF XY:

0.0000296

AC XY:

AN XY:

135022

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000145

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:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.00000686

AC:

AN:

1458434

Hom.:

Cov.:

AF XY:

0.00000965

AC XY:

AN XY:

725612

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000134

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:

0.00000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000662

AC:

AN:

151110

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73700

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000148

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5Other:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not provided

Uncertain:1Other:1

not provided, no classification provided	literature only	Leiden Muscular Dystrophy (RYR1)	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jun 11, 2019	- -

Malignant hyperthermia, susceptibility to, 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Jun 28, 2023

- -

RYR1-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Aug 23, 2022

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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt RYR1 protein function. ClinVar contains an entry for this variant (Variation ID: 133212). This missense change has been observed in individual(s) with malignant hyperthermia (PMID: 16917943). This variant is present in population databases (rs193922824, gnomAD 0.009%). This sequence change replaces threonine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 2596 of the RYR1 protein (p.Thr2596Ile). -

Malignant hyperthermia of anesthesia

Uncertain:1

Uncertain significance, reviewed by expert panel

curation

ClinGen Malignant Hyperthermia Susceptibility Variant Curation Expert Panel, ClinGen

Apr 06, 2023

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 threonine with isoleucine at codon 2596 of the RYR1 protein, p.(Thr2596Ile). The maximum allele frequency for this variant among the six major gnomAD populations is AMR: 0.000145, 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, PS4 not implemented (PMID:16917943). 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 0.822 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;C0751951:Central core myopathy;C1840365:King Denborough syndrome;C1850674:Congenital multicore myopathy with external ophthalmoplegia;C2930980:Malignant hyperthermia, susceptibility to, 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jul 15, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Pathogenic

0.32

CADD

Uncertain

DANN

Benign

0.92

DEOGEN2

Pathogenic

0.86

.;D

Eigen

Uncertain

0.33

Eigen_PC

Benign

0.20

FATHMM_MKL

Uncertain

0.92

LIST_S2

Pathogenic

1.0

D;D

M_CAP

Pathogenic

0.87

MetaRNN

Pathogenic

0.95

D;D

MetaSVM

Pathogenic

0.92

MutationAssessor

Uncertain

2.5

M;M

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Pathogenic

0.85

PROVEAN

Pathogenic

-5.8

D;D

REVEL

Pathogenic

0.82

Sift

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.86

MutPred

0.75

Loss of phosphorylation at T2596 (P = 0.0418);Loss of phosphorylation at T2596 (P = 0.0418);

MVP

0.97

MPC

0.34

ClinPred

0.96

GERP RS

3.0

Varity_R

0.74

gMVP

0.82

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

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