rs771058055
Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM1BP2
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 glutamic acid with lysine at codon 209 of the RYR1 protein, p.(Glu209Lys). The maximum allele frequency for this variant among the six major gnomAD populations is EAS: 0.000062, 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 and 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), however, this individual also carried a pathogenic variant in RYR1 (p.Arg2336His, in cis) which precludes the use of PS4 (PMID:21455645). Additionally, the presence of a pathogenic variant in cis is considered supporting evidence for benign status, BP2. 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 (PMID:21118704). A REVEL score of 0.711 supports neither a pathogenic nor a benign status for this variant. This variant has been classified as a Variant of Unknown Significance. Criteria implemented: PM1, BP2. LINK:https://erepo.genome.network/evrepo/ui/classification/CA067959/MONDO:0018493/012
Frequency
Consequence
NM_000540.3 missense
Scores
Clinical Significance
Conservation
Genome browser will be placed here
ACMG classification
Verdict is Uncertain_significance. Variant got 1 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
RYR1 | NM_000540.3 | c.625G>A | p.Glu209Lys | missense_variant | 7/106 | ENST00000359596.8 | NP_000531.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
RYR1 | ENST00000359596.8 | c.625G>A | p.Glu209Lys | missense_variant | 7/106 | 5 | NM_000540.3 | ENSP00000352608 | A2 | |
RYR1 | ENST00000355481.8 | c.625G>A | p.Glu209Lys | missense_variant | 7/105 | 1 | ENSP00000347667 | P4 | ||
RYR1 | ENST00000599547.6 | c.625G>A | p.Glu209Lys | missense_variant, NMD_transcript_variant | 7/80 | 2 | ENSP00000471601 |
Frequencies
GnomAD3 genomes Cov.: 31
GnomAD3 exomes AF: 0.0000201 AC: 5AN: 248998Hom.: 0 AF XY: 0.0000223 AC XY: 3AN XY: 134672
GnomAD4 exome AF: 0.0000205 AC: 30AN: 1460774Hom.: 0 Cov.: 35 AF XY: 0.0000179 AC XY: 13AN XY: 726620
GnomAD4 genome Cov.: 31
ClinVar
Submissions by phenotype
not provided Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Mayo Clinic Laboratories, Mayo Clinic | Jan 12, 2023 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | Apr 14, 2022 | - - |
Malignant hyperthermia, susceptibility to, 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | May 30, 2024 | This missense variant replaces glutamic acid with lysine at codon 209 of the RYR1 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with malignant hyperthermia susceptibility, this individual also carried a known pathogenic variant in the RYR1 gene that could explain the observed phenotype (PMID: 21455645). This variant has been identified in 5/248998 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. - |
RYR1-related disorder Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 07, 2024 | This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 209 of the RYR1 protein (p.Glu209Lys). This variant is present in population databases (rs771058055, gnomAD 0.007%). This missense change has been observed to co-occur in individuals with a different variant in RYR1 that has been determined to be pathogenic (PMID: 21455645), but the significance of this finding is unclear. ClinVar contains an entry for this variant (Variation ID: 478249). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on RYR1 protein function. 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 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 glutamic acid with lysine at codon 209 of the RYR1 protein, p.(Glu209Lys). The maximum allele frequency for this variant among the six major gnomAD populations is EAS: 0.000062, 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 and 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), however, this individual also carried a pathogenic variant in RYR1 (p.Arg2336His, in cis) which precludes the use of PS4 (PMID:21455645). Additionally, the presence of a pathogenic variant in cis is considered supporting evidence for benign status, BP2. 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 (PMID: 21118704). A REVEL score of 0.711 supports neither a pathogenic nor a benign status for this variant. This variant has been classified as a Variant of Unknown Significance. Criteria implemented: PM1, BP2. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at