rs199571249
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_001232.4(CASQ2):c.758G>T(p.Arg253Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. R253H) has been classified as Uncertain significance.
Frequency
Genomes: not found (cov: 30)
Consequence
CASQ2
NM_001232.4 missense
NM_001232.4 missense
Scores
3
9
7
Clinical Significance
Conservation
PhyloP100: 3.29
Genes affected
CASQ2 (HGNC:1513): (calsequestrin 2) The protein encoded by this gene specifies the cardiac muscle family member of the calsequestrin family. Calsequestrin is localized to the sarcoplasmic reticulum in cardiac and slow skeletal muscle cells. The protein is a calcium binding protein that stores calcium for muscle function. Mutations in this gene cause stress-induced polymorphic ventricular tachycardia, also referred to as catecholaminergic polymorphic ventricular tachycardia 2 (CPVT2), a disease characterized by bidirectional ventricular tachycardia that may lead to cardiac arrest. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 2 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CASQ2 | NM_001232.4 | c.758G>T | p.Arg253Leu | missense_variant | 7/11 | ENST00000261448.6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CASQ2 | ENST00000261448.6 | c.758G>T | p.Arg253Leu | missense_variant | 7/11 | 1 | NM_001232.4 | P1 | |
CASQ2 | ENST00000488931.2 | c.*130G>T | 3_prime_UTR_variant, NMD_transcript_variant | 9/13 | 3 |
Frequencies
GnomAD3 genomes ? Cov.: 30
GnomAD3 genomes
?
Cov.:
30
GnomAD4 exome Cov.: 45
GnomAD4 exome
Cov.:
45
GnomAD4 genome ? Cov.: 30
GnomAD4 genome
?
Cov.:
30
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Catecholaminergic polymorphic ventricular tachycardia 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Apr 06, 2018 | This sequence change replaces arginine with leucine at codon 253 of the CASQ2 protein (p.Arg253Leu). The arginine residue is moderately conserved and there is a moderate physicochemical difference between arginine and leucine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with CASQ2-related disease. ClinVar contains an entry for this variant (Variation ID: 463663). 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, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
DEOGEN2
Uncertain
D
Eigen
Benign
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D
M_CAP
Benign
T
MetaRNN
Uncertain
D
MetaSVM
Benign
T
MutationAssessor
Uncertain
M
MutationTaster
Benign
D;D
PrimateAI
Benign
T
PROVEAN
Uncertain
D
REVEL
Uncertain
Sift
Benign
D
Sift4G
Uncertain
D
Polyphen
B
Vest4
MutPred
Loss of disorder (P = 0.0402);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at