rs730882253

chr14-90403951-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PP2 PP3_Moderate PP5_Moderate

The NM_006888.6(CALM1):c.268T>C(p.Phe90Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CALM1 NM_006888.6 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 7.97

Genes affected

CALM1 (HGNC:1442): (calmodulin 1) This gene encodes one of three calmodulin proteins which are members of the EF-hand calcium-binding protein family. Calcium-induced activation of calmodulin regulates and modulates the function of cardiac ion channels. Two pseudogenes have been identified on chromosome 7 and X. Multiple transcript variants encoding different isoforms have been found for this gene.A missense mutation in the CALM1 gene has been associated with ventricular tachycardia.[provided by RefSeq, May 2020]

(HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_006888.6
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, CALM1
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.928
• PP5: Variant 14-90403951-T-C is Pathogenic according to our data. Variant chr14-90403951-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 183232.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CALM1	NM_006888.6	c.268T>C	p.Phe90Leu	missense_variant	4/6	ENST00000356978.9
CALM1	NM_001363670.2	c.271T>C	p.Phe91Leu	missense_variant	4/6
CALM1	NM_001363669.2	c.160T>C	p.Phe54Leu	missense_variant	4/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CALM1	ENST00000356978.9	c.268T>C	p.Phe90Leu	missense_variant	4/6	1	NM_006888.6	P1
	ENST00000555853.1	n.45-1173A>G		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 27

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Long QT syndrome 14 Pathogenic:2

Pathogenic, no assertion criteria provided	literature only	OMIM	Jan 28, 2014	- -
Likely pathogenic, criteria provided, single submitter	curation	SIB Swiss Institute of Bioinformatics	Jul 22, 2020	This variant is interpreted as likely pathogenic for Long QT syndrome 14, autosomal dominant. The following ACMG Tag(s) were applied: Absent from controls (or at extremely low frequency if recessive) in Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium (PM2); Multiple lines of computational evidence support a deleterious effect on the gene or gene product (PP3); Cosegregation with disease in multiple affected family members in a gene definitively known to cause the disease (PP1) (PMID:24076290); Well-established functional studies show a deleterious effect (PS3 downgraded to moderate) (PMID:27165696; 25036739). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
CardioboostArm	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.37
Cadd	Pathogenic	29
Dann	Uncertain	1.0
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.94	D;.;D;.;.
M_CAP	Pathogenic	0.82	D
MetaRNN	Pathogenic	0.93	D;D;D;D;D
MetaSVM	Uncertain	0.77	D
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.94	D
PROVEAN	Pathogenic	-5.6	D;D;D;D;D
REVEL	Pathogenic	0.90
Sift4G	Uncertain	0.034	D;D;T;D;D
Polyphen		0.96	.;.;P;.;.
Vest4		0.95, 0.96, 0.95, 0.95
MutPred		0.74		.;.;Loss of methylation at K96 (P = 0.0988);.;.;
MVP		0.98
MPC		2.5
ClinPred		1.0	D
GERP RS		4.0
Varity_R		0.90
gMVP		0.99

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

Publications

LitVar

Other links and lift over

dbSNP: rs730882253; hg19: chr14-90870295;