rs886039816

chr1-115732968-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001232.4(CASQ2):c.539A>G(p.Lys180Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign 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. K180Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CASQ2 NM_001232.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 O:1
• Conservation: PhyloP100: 4.61

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.33082646).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CASQ2	NM_001232.4	c.539A>G	p.Lys180Arg	missense_variant	5/11	ENST00000261448.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CASQ2	ENST00000261448.6	c.539A>G	p.Lys180Arg	missense_variant	5/11	1	NM_001232.4	P1
CASQ2	ENST00000488931.2	c.263A>G	p.Lys88Arg	missense_variant, NMD_transcript_variant	6/13	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Catecholaminergic polymorphic ventricular tachycardia 2 Uncertain:1 Other:1

not provided, no classification provided	literature only	GeneReviews	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Neuberg Centre For Genomic Medicine, NCGM	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.093
BayesDel_addAF	Benign	-0.061	T
BayesDel_noAF	Benign	-0.33
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.24	T
Eigen	Benign	0.082
Eigen_PC	Uncertain	0.25
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.33	T
MetaSVM	Benign	-0.58	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.53	T
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.34
Sift	Benign	0.046	D
Sift4G	Benign	0.16	T
Polyphen		0.046	B
Vest4		0.39
MutPred		0.52		Loss of ubiquitination at K180 (P = 0.0199);
MVP		0.95
MPC		0.042
ClinPred		0.86	D
GERP RS		5.7
Varity_R		0.54
gMVP		0.50

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs886039816; hg19: chr1-116275589;