Genetic Variant CALM3:c.421+4A>G (chr19-46608985-A-G) – ACMG Classification: Benign (-9 pts)

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_005184.4(CALM3):c.421+4A>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000344 in 1,600,258 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

CALM3
NM_005184.4 splice_region, intron

Scores

Splicing: ADA: 0.2322

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 0.0880

Publications

0 publications found

Variant links:

Genes affected

CALM3 (HGNC:1449): (calmodulin 3) This gene encodes a member of a family of proteins that binds calcium and functions as a enzymatic co-factor. Activity of this protein is important in the regulation of the cell cycle and cytokinesis. Multiple alternatively spliced transcript variants have been observed at this gene. [provided by RefSeq, Aug 2016]

CALM3 Gene-Disease associations (from GenCC):

familial long QT syndrome
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
long QT syndrome
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
long QT syndrome 16
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
catecholaminergic polymorphic ventricular tachycardia
Inheritance: AD Classification: MODERATE Submitted by: G2P, ClinGen

CALM3 links:

LOC124904729 (HGNC:):

LOC124904729 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.69).

BP6

Variant 19-46608985-A-G is Benign according to our data. Variant chr19-46608985-A-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 409869.

BS2

High AC in GnomAd4 at 25 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005184.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
CALM3	NM_005184.4	MANE Select	c.421+4A>G	splice_region intron	N/A	NP_005175.2	P0DP25
CALM3	NM_001329922.1		c.421+4A>G	splice_region intron	N/A	NP_001316851.1	P0DP23
CALM3	NM_001329921.1		c.313+4A>G	splice_region intron	N/A	NP_001316850.1	Q96HY3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
CALM3	ENST00000291295.14	TSL:1 MANE Select	c.421+4A>G	splice_region intron	N/A	ENSP00000291295.8	P0DP25
CALM3	ENST00000599839.5	TSL:1	c.313+4A>G	splice_region intron	N/A	ENSP00000471225.1	Q96HY3
CALM3	ENST00000866718.1		c.457+4A>G	splice_region intron	N/A	ENSP00000536777.1

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000555

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000375

AC:

AN:

239782

AF XY:

0.0000309

show subpopulations

Gnomad AFR exome

AF:

0.000557

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:

0.0000207

AC:

AN:

1448014

Hom.:

Cov.:

AF XY:

0.0000125

AC XY:

AN XY:

718984

show subpopulations

African (AFR)

AF:

0.000844

AC:

AN:

33184

American (AMR)

AF:

0.00

AC:

AN:

43010

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25104

East Asian (EAS)

AF:

0.00

AC:

AN:

39500

South Asian (SAS)

AF:

0.00

AC:

AN:

84438

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52974

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5694

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1104340

Other (OTH)

AF:

0.0000335

AC:

AN:

59770

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000164

AC:

AN:

152244

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74428

show subpopulations

African (AFR)

AF:

0.000578

AC:

AN:

41542

American (AMR)

AF:

0.0000654

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68004

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.527

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000329

Hom.:

Bravo

AF:

0.000166

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Cardiovascular phenotype (1)

Long QT syndrome 1 (1)

Long QT syndrome 16 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.69

CADD

Benign

(source)

DANN

Benign

0.73

PhyloP100

0.088

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.23

dbscSNV1_RF

Benign

0.37

SpliceAI score (max)

0.13

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over