chr1-115768367-G-C

Variant names:

• chr1-115768367-G-C
• rs866858282
• NM_001232.4:c.175C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001232.4(CASQ2):​c.175C>G​(p.Pro59Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,824 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P59S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CASQ2 NM_001232.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.54
• Publications: 0 publications found

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]

CASQ2 Gene-Disease associations (from GenCC):

• catecholaminergic polymorphic ventricular tachycardia

  Inheritance: AD, AR Classification: DEFINITIVE, MODERATE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• catecholaminergic polymorphic ventricular tachycardia 2

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, Genomics England PanelApp
• hypertrophic cardiomyopathy

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001232.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CASQ2	NM_001232.4	MANE Select	c.175C>G	p.Pro59Ala	missense	Exon 1 of 11	NP_001223.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CASQ2	ENST00000261448.6	TSL:1 MANE Select	c.175C>G	p.Pro59Ala	missense	Exon 1 of 11	ENSP00000261448.5
	CASQ2	ENST00000713711.1		c.175C>G	p.Pro59Ala	missense	Exon 1 of 12	ENSP00000519014.1
	CASQ2	ENST00000874189.1		c.175C>G	p.Pro59Ala	missense	Exon 1 of 10	ENSP00000544248.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000796 AC: 2 AN: 251336 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461824 Hom.: 0 Cov.: 33 AF XY: 0.00000413 AC XY: 3 AN XY: 727224

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.0000348 AC: 3 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111958

Other (OTH) AF: 0.00 AC: 0 AN: 60386

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.073
BayesDel_addAF	Benign	-0.092	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.75	D
Eigen	Benign	0.18
Eigen_PC	Benign	0.16
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.029	D
MetaRNN	Uncertain	0.56	D
MetaSVM	Benign	-0.94	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		4.5
PrimateAI	Uncertain	0.52	T
PROVEAN	Pathogenic	-4.4	D
REVEL	Benign	0.23
Sift	Uncertain	0.016	D
Sift4G	Uncertain	0.0090	D
Polyphen		0.68	P
Vest4		0.31
MutPred		0.74		Loss of sheet (P = 0.0457)
MVP		0.53
MPC		0.22
ClinPred		0.87	D
GERP RS		3.6
PromoterAI		0.017	Neutral
Varity_R		0.31
gMVP		0.66
Mutation Taster		=67/33	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs866858282; hg19: chr1-116310988;