rs72554057

Variant names:

• chr1-115732967-C-T
• rs72554057
• NM_001232.4:c.540G>A

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_Moderate BP6_Very_Strong BP7

The NM_001232.4(CASQ2):​c.540G>A​(p.Lys180Lys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000164 in 1,612,486 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00011 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00017 (1 hom.)
• Consequence: CASQ2 NM_001232.4 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:10
• Conservation: PhyloP100: 0.338
• Publications: 1 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: ClinGen, Orphanet
• catecholaminergic polymorphic ventricular tachycardia 2

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

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.31).
• BP6: Variant 1-115732967-C-T is Benign according to our data. Variant chr1-115732967-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 178010.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.338 with no splicing effect.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CASQ2	NM_001232.4	MANE Select	c.540G>A	p.Lys180Lys	synonymous	Exon 5 of 11	NP_001223.2	O14958-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CASQ2	ENST00000261448.6	TSL:1 MANE Select	c.540G>A	p.Lys180Lys	synonymous	Exon 5 of 11	ENSP00000261448.5	O14958-1
	CASQ2	ENST00000713711.1		c.681G>A	p.Lys227Lys	synonymous	Exon 6 of 12	ENSP00000519014.1	A0AAQ5BGS1
	CASQ2	ENST00000874189.1		c.540G>A	p.Lys180Lys	synonymous	Exon 5 of 10	ENSP00000544248.1

Frequencies

GnomAD3 genomes AF: 0.000112 AC: 17 AN: 152012 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000191

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000876 AC: 22 AN: 251214 AF XY: 0.0000958

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000171 AC: 249 AN: 1460358 Hom.: 1 Cov.: 29 AF XY: 0.000172 AC XY: 125 AN XY: 726580

African (AFR) AF: 0.0000897 AC: 3 AN: 33446

American (AMR) AF: 0.0000447 AC: 2 AN: 44714

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26120

East Asian (EAS) AF: 0.00 AC: 0 AN: 39664

South Asian (SAS) AF: 0.00 AC: 0 AN: 86208

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53386

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.000214 AC: 238 AN: 1110718

Other (OTH) AF: 0.0000994 AC: 6 AN: 60338

GnomAD4 genome AF: 0.000105 AC: 16 AN: 152128 Hom.: 0 Cov.: 32 AF XY: 0.000108 AC XY: 8 AN XY: 74360

African (AFR) AF: 0.0000241 AC: 1 AN: 41490

American (AMR) AF: 0.000131 AC: 2 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5160

South Asian (SAS) AF: 0.00 AC: 0 AN: 4810

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10586

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.000191 AC: 13 AN: 68012

Other (OTH) AF: 0.00 AC: 0 AN: 2114

Alfa AF: 0.000115 Hom.: 0

Bravo AF: 0.0000567

EpiCase AF: 0.0000546

EpiControl AF: 0.000237

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	3	not provided (3)
-	-	3	not specified (3)
-	-	1	Cardiomyopathy (1)
-	-	1	Cardiovascular phenotype (1)
-	-	1	Catecholaminergic polymorphic ventricular tachycardia 1 (1)
-	-	1	Catecholaminergic polymorphic ventricular tachycardia 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.31
CADD	Benign	7.8
DANN	Benign	0.70
PhyloP100		0.34
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs72554057; hg19: chr1-116275588;