rs137933390
Variant summary
Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BA1
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 lysine with arginine at codon 1393 of the RYR1 protein, p.(Lys1393Arg). The maximum allele frequency for this variant among the six major gnomAD populations is NFE: 0.0046, which is considered to be too common for a pathogenic variant causing autosomal dominantly inherited MHS, BA1. This variant has been classified as Benign. Criteria implemented: BA1. LINK:https://erepo.genome.network/evrepo/ui/classification/CA024433/MONDO:0018493/012
Frequency
Consequence
NM_000540.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -8 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
RYR1 | NM_000540.3 | c.4178A>G | p.Lys1393Arg | missense_variant | 29/106 | ENST00000359596.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
RYR1 | ENST00000359596.8 | c.4178A>G | p.Lys1393Arg | missense_variant | 29/106 | 5 | NM_000540.3 | A2 | |
RYR1 | ENST00000355481.8 | c.4178A>G | p.Lys1393Arg | missense_variant | 29/105 | 1 | P4 | ||
RYR1 | ENST00000599547.6 | c.4178A>G | p.Lys1393Arg | missense_variant, NMD_transcript_variant | 29/80 | 2 |
Frequencies
GnomAD3 genomes ? AF: 0.00277 AC: 422AN: 152132Hom.: 1 Cov.: 32
GnomAD3 exomes AF: 0.00273 AC: 617AN: 225862Hom.: 3 AF XY: 0.00269 AC XY: 327AN XY: 121580
GnomAD4 exome AF: 0.00353 AC: 5110AN: 1447116Hom.: 19 Cov.: 32 AF XY: 0.00344 AC XY: 2472AN XY: 718420
GnomAD4 genome ? AF: 0.00277 AC: 421AN: 152250Hom.: 1 Cov.: 32 AF XY: 0.00222 AC XY: 165AN XY: 74444
ClinVar
Submissions by phenotype
not provided Uncertain:4Benign:5
Uncertain significance, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Jun 03, 2015 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Mayo Clinic Laboratories, Mayo Clinic | Dec 01, 2021 | - - |
Likely benign, no assertion criteria provided | clinical testing | Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen | - | - - |
Likely benign, no assertion criteria provided | clinical testing | Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC) | - | - - |
Likely benign, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Jun 01, 2024 | RYR1: BS2 - |
Uncertain significance, criteria provided, single submitter | clinical testing | Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics | Feb 22, 2017 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories | Apr 01, 2022 | The RYR1 c.4178A>G, p.Lys1393Arg variant (rs137933390) has been identified in several individuals with clinical suspicion for malignant hyperthermia susceptibility (MHS) syndrome or other related myopathy (Bick 2017, Gillies 2015, Loseth 2013, Vukcevic 2010). Additionally, a cell line isolated from an MHS patient showed increased sensitivity to 4-chloro-m-cresol (Vukcevic 2010). However, variant has been identified at high allele frequency in several control populations, and is found in the non-Finnish European population with an allele frequency of 0.46% (537/ 115776 alleles, including 2 homozygotes) in the Genome Aggregation Database. Due to this high population frequency, the ClinGen Malignant Hyperthermia Susceptibility Variant Curation Expert Panel considers this variant benign with respect to autosomal dominant MHS (ClinVar Variation ID: 93269). However, this population frequency alone is not high enough alone to rule out a potential role with respect to the recessive myopathies associated with loss of function variation in RYR1. Therefore, while considered benign for MHS specifically, the overall classification of this variant is uncertain. References: Bick D et al. Successful Application of Whole Genome Sequencing in a Medical Genetics Clinic. J Pediatr Genet. 2017 Jun;6(2):61-76. PMID: 28496993 Gillies RL et al. Analysis of the entire ryanodine receptor type 1 and alpha 1 subunit of the dihydropyridine receptor (CACNA1S) coding regions for variants associated with malignant hyperthermia in Australian families. Anaesth Intensive Care. 2015 Mar;43(2):157-66. PMID: 25735680. Loseth S et al. A novel late-onset axial myopathy associated with mutations in the skeletal muscle ryanodine receptor (RYR1) gene. J Neurol. 2013 Jun;260(6):1504-10. PMID: 23329375. Vukcevic M et al. Functional properties of RYR1 mutations identified in Swedish patients with malignant hyperthermia and central core disease. Anesth Analg. 2010 Jul;111(1):185-90. PMID: 20142353. - |
Likely benign, no assertion criteria provided | clinical testing | Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+ | - | - - |
Likely benign, criteria provided, single submitter | clinical testing | GeneDx | Oct 06, 2020 | Reported previously in individuals with features of RYR1-related disorders, but familial segregation information was not always included and some individuals were noted to have other potentially causative variants (Vukcevic et al., 2010; Dlamini et al., 2013; Loseth et al., 2013; Gillies et al., 2015); In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 26332594, 20142353, 27153395, 25637381, 25985138, 23329375, 24195946, 25735680, 23628358, 28496993, 30788618, 30916033) - |
Malignant hyperthermia, susceptibility to, 1 Benign:5
Benign, criteria provided, single submitter | research | Biesecker Lab/Clinical Genomics Section, National Institutes of Health | Jul 01, 2013 | - - |
Likely benign, no assertion criteria provided | research | CSER _CC_NCGL, University of Washington | Jun 01, 2014 | - - |
Likely benign, criteria provided, single submitter | clinical testing | Molecular Genetics, Royal Melbourne Hospital | Mar 30, 2023 | This sequence change is predicted to replace lysine with arginine at codon 1393 of the RYR1 protein (p.(Lys1393Arg)). The lysine residue is conserved (100 vertebrates, UCSC), and there is a small physicochemical difference between lysine and arginine. It is not in an annotated domain. The variant is present in a large population cohort at a frequency of 0.46% in the European non-Finnish population (rs137933390, gnomAD v2.1.1 and v3.0). In comparison, the variant was present at a frequency of 0.46% in a cohort of individuals with malignant hyperthermia susceptibility (PMID: 24195946). This variant has been seen in at least 13 individuals with malignant hyperthermia susceptibility, including some individuals where another RYR1 variant was identified (PMID: 24195946, 19346234, 25960145, 23558838, 24433488, 25735680, 28326467), as well as being present in individuals with myopathy, rhabdomyolysis and exertional heat stroke (PMID: 22473935, 23628358, 23329375, 26565425, 28496993), although several authors acknowledge the high population frequency and comment that the variant is unlikely to be pathogenic. This variant has been shown not to segregate with the malignant hyperthermia susceptibility phenotype in two unrelated families, although the pedigrees have not been confirmed (PMID: 25658027). It has been reported in at least three further individuals without malignant hyperthermia (PMID: 25614869). Functional data from a lymphoblastoid cell line demonstrated 4-chloro-m-cresol induced calcium release at a lower concentration, however it is unclear whether this is a true reflection of the skeletal myocyte (PMID: 20142353). Multiple lines of computational evidence have conflicting predictions for the missense substitution (4/6 algorithms predict benign/neutral effect, 1/6 algorithms predict deleterious effect, 1/6 algorithms have an unknown prediction). Based on the classification guidelines RMH Modified ACMG Guidelines v1.3.0, this variant is classified as LIKELY BENIGN. The following criteria are met: BS1, BP5. - |
Likely benign, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Jul 12, 2022 | - - |
Benign, criteria provided, single submitter | clinical testing | Mendelics | May 28, 2019 | - - |
not specified Uncertain:1Benign:1
Benign, no assertion criteria provided | clinical testing | Genome Diagnostics Laboratory, University Medical Center Utrecht | - | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Athena Diagnostics | Apr 21, 2017 | - - |
RYR1-related disorder Benign:2
Likely benign, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Apr 01, 2022 | This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). - |
Likely benign, criteria provided, single submitter | clinical testing | Invitae | Feb 01, 2024 | - - |
Malignant hyperthermia of anesthesia Benign:2
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jun 14, 2016 | - - |
Benign, reviewed by expert panel | curation | ClinGen Malignant Hyperthermia Susceptibility Variant Curation Expert Panel, ClinGen | Jan 03, 2022 | 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 lysine with arginine at codon 1393 of the RYR1 protein, p.(Lys1393Arg). The maximum allele frequency for this variant among the six major gnomAD populations is NFE: 0.0046, which is considered to be too common for a pathogenic variant causing autosomal dominantly inherited MHS, BA1. This variant has been classified as Benign. Criteria implemented: BA1. - |
Congenital multicore myopathy with external ophthalmoplegia Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Feb 09, 2018 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Central core myopathy Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Feb 09, 2018 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. - |
Neuromuscular disease, congenital, with uniform type 1 fiber Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jun 14, 2016 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at