19-38494565-G-C

Variant names:

• chr19-38494565-G-C
• rs118192163
• NM_000540.3:c.6488G>C

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PP1 PP3_Moderate PM1_Supporting PS4_Moderate PM5

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 proline at codon 2163 of the RYR1 protein, p.Arg2163Pro. This variant was not present in a large population database (gnomAD) at the time this variant was interpreted. This variant has been reported in four unrelated individuals who have a personal or family history of a malignant hyperthermia reaction, all of these individuals had 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_Moderate (PMID:10757649, PMID:20681998, PMID:24433488, PMID:31559918). This variant segregates with MHS in five individuals, PP1 (PMID:10757649). No functional studies were identified for this variant. Another variant has been assessed as pathogenic occurs at this codon, p.(Arg2163His), PM5. This variant resides in a region of RYR1 considered to be a hotspot for pathogenic variants that contribute to MHS, use PM1_Supporting to avoid overweighting with PM5 (PMID:21118704). Another variant has been assessed as pathogenic occurs at this codon, p.(Arg2163His), PM5. A REVEL score >0.85 (0.947) supports a pathogenic status for this variant, PP3_Moderate. This variant has been classified as Likely Pathogenic. Criteria implemented: PS4_Moderate, PM1_Supporting, PM5, PP3_Moderate, PP1. LINK:https://erepo.genome.network/evrepo/ui/classification/CA024596/MONDO:0007783/012

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: RYR1 NM_000540.3 missense
• Clinical Significance: Likely pathogenic reviewed by expert panel P:2 O:1
• Conservation: PhyloP100: 9.94

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PS4: For more information check the summary or visit ClinGen Evidence Repository.
• PM1: For more information check the summary or visit ClinGen Evidence Repository.
• PM5: For more information check the summary or visit ClinGen Evidence Repository.
• PP1: 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 rank	MANE	Protein	UniProt
RYR1	NM_000540.3	c.6488G>C	p.Arg2163Pro	missense_variant	Exon 39 of 106	ENST00000359596.8	NP_000531.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RYR1	ENST00000359596.8	c.6488G>C	p.Arg2163Pro	missense_variant	Exon 39 of 106	5	NM_000540.3	ENSP00000352608.2
RYR1	ENST00000355481.8	c.6488G>C	p.Arg2163Pro	missense_variant	Exon 39 of 105	1		ENSP00000347667.3
RYR1	ENST00000599547.6	n.6488G>C		non_coding_transcript_exon_variant	Exon 39 of 80	2		ENSP00000471601.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461756 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727164

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: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2 Other:1

Revision: reviewed by expert panel

Submissions by phenotype

not provided Pathogenic:1 Other:1

Oct 20, 2017

PreventionGenetics, part of Exact Sciences

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

RYR1 database

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Malignant hyperthermia, susceptibility to, 1 Pathogenic:1

Apr 06, 2023

ClinGen Malignant Hyperthermia Susceptibility Variant Curation Expert Panel, ClinGen

Significance: Likely pathogenic

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 proline at codon 2163 of the RYR1 protein, p.Arg2163Pro. This variant was not present in a large population database (gnomAD) at the time this variant was interpreted. This variant has been reported in four unrelated individuals who have a personal or family history of a malignant hyperthermia reaction, all of these individuals had 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_Moderate (PMID:10757649, PMID:20681998, PMID:24433488, PMID:31559918). This variant segregates with MHS in five individuals, PP1 (PMID:10757649). No functional studies were identified for this variant. Another variant has been assessed as pathogenic occurs at this codon, p.(Arg2163His), PM5. This variant resides in a region of RYR1 considered to be a hotspot for pathogenic variants that contribute to MHS, use PM1_Supporting to avoid overweighting with PM5 (PMID: 21118704). Another variant has been assessed as pathogenic occurs at this codon, p.(Arg2163His), PM5. A REVEL score >0.85 (0.947) supports a pathogenic status for this variant, PP3_Moderate. This variant has been classified as Likely Pathogenic. Criteria implemented: PS4_Moderate, PM1_Supporting, PM5, PP3_Moderate, PP1. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Pathogenic	0.56
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.97	.;D
Eigen	Pathogenic	0.70
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D;D
M_CAP	Pathogenic	0.59	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.8	M;M
PrimateAI	Pathogenic	0.80	T
PROVEAN	Pathogenic	-6.8	D;D
REVEL	Pathogenic	0.95
Sift	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.94
MutPred		0.96		Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);
MVP		0.97
MPC		1.0
ClinPred		1.0	D
GERP RS		4.6
Varity_R		0.95
gMVP		0.99

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

Other links and lift over

dbSNP: rs118192163; hg19: chr19-38985205;