rs193922863

Positions:

chr19-38573180-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM1_SupportingPP3_Moderate

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 proline with serine at codon 4668 of the RYR1 protein, p.(Pro4668Ser). The maximum allele frequency for this variant among the six major gnomAD populations is NFE: 0.00000799, a frequency consistent with pathogenicity for MHS. This variant has been reported in one individual with a personal or family history of a malignant hyperthermia reaction. This individual did not have a positive in vitro contracture test (IVCT) or caffeine halothane contracture test (CHCT) result (PMID:11928716), as well this individual had a second RYR1 variant, p.(Leu4838Val), that is classified as Likely Pathogenic, PS4 was not implemented. No functional studies were identified for this variant. This variant resides in a region of RYR1 considered to be a hotspot for pathogenic variants that contribute to MHS, PM1_Sup (PMID:21118704). A REVEL score >0.85 (0.888) supports a pathogenic status for this variant, PP3_Moderate. This variant has been classified as a Variant of Unknown Significance. Criteria implemented: PM1_Supporting, PP3_Moderate. LINK:https://erepo.genome.network/evrepo/ui/classification/CA024099/MONDO:0018493/012

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

RYR1
NM_000540.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 7.88

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:

RYR1 (HGNC:):

RYR1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM1

For more information check the summary or visit ClinGen Evidence Repository.

PP3

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RYR1	NM_000540.3 linkuse as main transcript	c.14002C>T	p.Pro4668Ser	missense_variant	96/106	ENST00000359596.8	NP_000531.2	P21817-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RYR1	ENST00000359596.8 linkuse as main transcript	c.14002C>T	p.Pro4668Ser	missense_variant	96/106	5	NM_000540.3	ENSP00000352608.2		P21817-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152188

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:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251416

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135880

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:

0.00

Gnomad FIN exome

AF:

0.000139

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461474

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727042

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000150

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74336

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:

0.0000941

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1Other:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

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 proline with serine at codon 4668 of the RYR1 protein, p.(Pro4668Ser). The maximum allele frequency for this variant among the six major gnomAD populations is NFE: 0.00000799, a frequency consistent with pathogenicity for MHS. This variant has been reported in one individual with a personal or family history of a malignant hyperthermia reaction. This individual did not have a positive in vitro contracture test (IVCT) or caffeine halothane contracture test (CHCT) result (PMID: 11928716), as well this individual had a second RYR1 variant, p.(Leu4838Val), that is classified as Likely Pathogenic, PS4 was not implemented. No functional studies were identified for this variant. This variant resides in a region of RYR1 considered to be a hotspot for pathogenic variants that contribute to MHS, PM1_Sup (PMID: 21118704). A REVEL score >0.85 (0.888) supports a pathogenic status for this variant, PP3_Moderate. This variant has been classified as a Variant of Unknown Significance. Criteria implemented: PM1_Supporting, PP3_Moderate. -

not provided

Other:1

not provided, no classification provided

literature only

Leiden Muscular Dystrophy (RYR1)

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.41

BayesDel_noAF

Pathogenic

0.35

CADD

Uncertain

DANN

Benign

0.96

DEOGEN2

Pathogenic

0.93

.;D

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.68

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

1.0

D;D

M_CAP

Pathogenic

0.96

MetaRNN

Pathogenic

0.93

D;D

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

3.1

.;M

PrimateAI

Pathogenic

0.83

PROVEAN

Pathogenic

-6.9

D;D

REVEL

Pathogenic

0.89

Sift

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.84

MutPred

0.26

.;Gain of sheet (P = 0.0344);

MVP

0.97

MPC

0.68

ClinPred

0.97

GERP RS

4.4

Varity_R

0.83

gMVP

0.88

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

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