19-38500863-C-T
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PP2PP3_Moderate
The NM_000540.3(RYR1):c.7487C>T(p.Pro2496Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000508 in 1,614,026 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P2496R) has been classified as Uncertain significance.
Frequency
Consequence
NM_000540.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 3 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
RYR1 | NM_000540.3 | c.7487C>T | p.Pro2496Leu | missense_variant | 47/106 | ENST00000359596.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
RYR1 | ENST00000359596.8 | c.7487C>T | p.Pro2496Leu | missense_variant | 47/106 | 5 | NM_000540.3 | A2 | |
RYR1 | ENST00000355481.8 | c.7487C>T | p.Pro2496Leu | missense_variant | 47/105 | 1 | P4 | ||
RYR1 | ENST00000594335.5 | c.941C>T | p.Pro314Leu | missense_variant, NMD_transcript_variant | 8/49 | 1 | |||
RYR1 | ENST00000599547.6 | c.7487C>T | p.Pro2496Leu | missense_variant, NMD_transcript_variant | 47/80 | 2 |
Frequencies
GnomAD3 genomes ? AF: 0.0000657 AC: 10AN: 152172Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000915 AC: 23AN: 251336Hom.: 0 AF XY: 0.000103 AC XY: 14AN XY: 135882
GnomAD4 exome AF: 0.0000493 AC: 72AN: 1461854Hom.: 0 Cov.: 49 AF XY: 0.0000426 AC XY: 31AN XY: 727230
GnomAD4 genome ? AF: 0.0000657 AC: 10AN: 152172Hom.: 0 Cov.: 32 AF XY: 0.0000807 AC XY: 6AN XY: 74344
ClinVar
Submissions by phenotype
Malignant hyperthermia, susceptibility to, 1 Uncertain:4
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 leucine at codon 2496 of the RYR1 protein, p.(Pro2496Leu). The maximum allele frequency for this variant among the six major gnomAD populations is EAS: 0.00065, 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 an in vitro contracture test (IVCT) or caffeine halothane contracture test (CHCT) result, PS4 was not met (PMID:16732084). 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 >0.85 (0.96) supports a pathogenic status for this variant, PP3_Moderate. This variant has been classified as a Variant of Unknown Significance. Criteria implemented: PP3_Moderate. - |
Uncertain significance, criteria provided, single submitter | reference population | Soonchunhyang University Bucheon Hospital, Soonchunhyang University Medical Center | Mar 18, 2016 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Nov 20, 2023 | This missense variant replaces proline with leucine at codon 2496 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 hyperthemia susceptibility (PMID: 16732084). This variant has been identified in 25/282716 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. - |
Uncertain significance, criteria provided, single submitter | research | Biesecker Lab/Clinical Genomics Section, National Institutes of Health | Jul 01, 2013 | - - |
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 | Feb 21, 2023 | - - |
RYR1-related disorder Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Sep 01, 2022 | This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 2496 of the RYR1 protein (p.Pro2496Leu). This variant is present in population databases (rs193922817, gnomAD 0.07%). This missense change has been observed in individual(s) with malignant hyperthermia (PMID: 16732084). ClinVar contains an entry for this variant (Variation ID: 133204). 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. 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. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at