15-33660284-A-G
Variant summary
Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.
The NM_001036.6(RYR3):c.4483A>G(p.Ile1495Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000205 in 1,563,072 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. I1495F) has been classified as Uncertain significance.
Frequency
Consequence
NM_001036.6 missense
Scores
Clinical Significance
Conservation
Publications
- genetic developmental and epileptic encephalopathyInheritance: AD Classification: LIMITED Submitted by: ClinGen, G2P
 - congenital myopathyInheritance: AR Classification: NO_KNOWN Submitted by: ClinGen
 
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ACMG classification
Our verdict: Uncertain_significance. The variant received 0 ACMG points.
Transcripts
RefSeq
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt | 
|---|---|---|---|---|---|---|---|---|---|---|
| RYR3 | ENST00000634891.2  | c.4483A>G | p.Ile1495Val | missense_variant | Exon 34 of 104 | 1 | NM_001036.6 | ENSP00000489262.1 | ||
| RYR3 | ENST00000389232.9  | c.4483A>G | p.Ile1495Val | missense_variant | Exon 34 of 104 | 5 | ENSP00000373884.5 | |||
| RYR3 | ENST00000415757.7  | c.4483A>G | p.Ile1495Val | missense_variant | Exon 34 of 103 | 2 | ENSP00000399610.3 | |||
| RYR3 | ENST00000634418.1  | c.4483A>G | p.Ile1495Val | missense_variant | Exon 34 of 102 | 5 | ENSP00000489529.1 | 
Frequencies
GnomAD3 genomes   AF:  0.0000263  AC: 4AN: 152178Hom.:  0  Cov.: 33 show subpopulations 
GnomAD2 exomes  AF:  0.0000231  AC: 4AN: 173102 AF XY:  0.0000217   show subpopulations 
GnomAD4 exome  AF:  0.0000198  AC: 28AN: 1410894Hom.:  0  Cov.: 32 AF XY:  0.0000172  AC XY: 12AN XY: 696900 show subpopulations 
Age Distribution
GnomAD4 genome   AF:  0.0000263  AC: 4AN: 152178Hom.:  0  Cov.: 33 AF XY:  0.0000269  AC XY: 2AN XY: 74338 show subpopulations 
Age Distribution
ClinVar
Submissions by phenotype
not specified    Uncertain:1 
The c.4483A>G (p.I1495V) alteration is located in exon 34 (coding exon 34) of the RYR3 gene. This alteration results from a A to G substitution at nucleotide position 4483, causing the isoleucine (I) at amino acid position 1495 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -
Epileptic encephalopathy    Uncertain:1 
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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. ClinVar contains an entry for this variant (Variation ID: 461914). This variant has not been reported in the literature in individuals affected with RYR3-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.006%). This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1495 of the RYR3 protein (p.Ile1495Val). -
Computational scores
Source: 
Splicing
 Find out detailed SpliceAI scores and Pangolin per-transcript scores at