19-13286646-G-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_ModerateBP6BS2

The NM_001127222.2(CACNA1A):c.3410C>G(p.Pro1137Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000126 in 1,544,684 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P1137L) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 30)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

CACNA1A
NM_001127222.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:4

Conservation

PhyloP100: 5.35

Publications

2 publications found

Variant links:

Genes affected

CACNA1A (HGNC:1388): (calcium voltage-gated channel subunit alpha1 A) Voltage-dependent calcium channels mediate the entry of calcium ions into excitable cells, and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, and gene expression. Calcium channels are multisubunit complexes composed of alpha-1, beta, alpha-2/delta, and gamma subunits. The channel activity is directed by the pore-forming alpha-1 subunit, whereas, the others act as auxiliary subunits regulating this activity. The distinctive properties of the calcium channel types are related primarily to the expression of a variety of alpha-1 isoforms, alpha-1A, B, C, D, E, and S. This gene encodes the alpha-1A subunit, which is predominantly expressed in neuronal tissue. Mutations in this gene are associated with 2 neurologic disorders, familial hemiplegic migraine and episodic ataxia 2. This gene also exhibits polymorphic variation due to (CAG)n-repeats. Multiple transcript variants encoding different isoforms have been found for this gene. In one set of transcript variants, the (CAG)n-repeats occur in the 3' UTR, and are not associated with any disease. But in another set of variants, an insertion extends the coding region to include the (CAG)n-repeats which encode a polyglutamine tract. Expansion of the (CAG)n-repeats from the normal 4-18 to 21-33 in the coding region is associated with spinocerebellar ataxia 6. [provided by RefSeq, Jul 2016]

CACNA1A Gene-Disease associations (from GenCC):

episodic ataxia type 2
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
undetermined early-onset epileptic encephalopathy
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Illumina
developmental and epileptic encephalopathy, 42
Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
migraine, familial hemiplegic, 1
Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
spinocerebellar ataxia type 6
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet
benign paroxysmal torticollis of infancy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial or sporadic hemiplegic migraine
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Lennox-Gastaut syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CACNA1A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.12688565).

BP6

Variant 19-13286646-G-C is Benign according to our data. Variant chr19-13286646-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 430288.

BS2

High AC in GnomAd4 at 16 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001127222.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CACNA1A	NM_001127222.2	MANE Select	c.3410C>G	p.Pro1137Arg	missense	Exon 20 of 47	NP_001120694.1
CACNA1A	NM_001127221.2	MANE Plus Clinical	c.3413C>G	p.Pro1138Arg	missense	Exon 20 of 47	NP_001120693.1
CACNA1A	NM_023035.3		c.3422C>G	p.Pro1141Arg	missense	Exon 20 of 48	NP_075461.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CACNA1A	ENST00000360228.11	TSL:1 MANE Select	c.3410C>G	p.Pro1137Arg	missense	Exon 20 of 47	ENSP00000353362.5
CACNA1A	ENST00000638009.2	TSL:1 MANE Plus Clinical	c.3413C>G	p.Pro1138Arg	missense	Exon 20 of 47	ENSP00000489913.1
CACNA1A	ENST00000638029.1	TSL:5	c.3422C>G	p.Pro1141Arg	missense	Exon 20 of 48	ENSP00000489829.1

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

151924

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000209

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000177

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000110

AC:

AN:

191438

AF XY:

0.000108

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000769

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000124

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000179

Gnomad OTH exome

AF:

0.000226

GnomAD4 exome

AF:

0.000128

AC:

178

AN:

1392642

Hom.:

Cov.:

AF XY:

0.000124

AC XY:

AN XY:

685316

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31294

American (AMR)

AF:

0.000141

AC:

AN:

35476

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

21472

East Asian (EAS)

AF:

0.000153

AC:

AN:

39088

South Asian (SAS)

AF:

0.0000796

AC:

AN:

75422

European-Finnish (FIN)

AF:

0.0000201

AC:

AN:

49770

Middle Eastern (MID)

AF:

0.000186

AC:

AN:

5386

European-Non Finnish (NFE)

AF:

0.000146

AC:

157

AN:

1077410

Other (OTH)

AF:

0.0000349

AC:

AN:

57324

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.531

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:

0.000105

AC:

AN:

152042

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74336

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41480

American (AMR)

AF:

0.0000654

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5152

South Asian (SAS)

AF:

0.000209

AC:

AN:

4790

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000177

AC:

AN:

67954

Other (OTH)

AF:

0.00

AC:

AN:

2102

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

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:

0.00

Hom.:

Bravo

AF:

0.0000793

ExAC

AF:

0.000108

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

May 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CACNA1A: PP2

Jan 14, 2020

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Oct 13, 2020

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge

Spinocerebellar ataxia type 6;C1720416:Episodic ataxia type 2;C1832884:Migraine, familial hemiplegic, 1;C4310716:Developmental and epileptic encephalopathy, 42

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not specified

Benign:1

Jan 24, 2024

Athena Diagnostics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Episodic ataxia type 2;C4310716:Developmental and epileptic encephalopathy, 42

Benign:1

Oct 22, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Inborn genetic diseases

Benign:1

Dec 28, 2023

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.041

BayesDel_noAF

Uncertain

-0.020

CADD

Uncertain

(source)

DANN

Benign

0.93

DEOGEN2

Uncertain

0.45

Eigen

Benign

-0.21

Eigen_PC

Benign

-0.0043

FATHMM_MKL

Benign

0.70

LIST_S2

Uncertain

0.88

M_CAP

Pathogenic

0.35

MetaRNN

Benign

0.13

MetaSVM

Uncertain

0.29

MutationAssessor

Benign

1.7

PhyloP100

5.3

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-3.4

REVEL

Uncertain

0.32

Sift

Uncertain

0.0040

Sift4G

Benign

0.13

Vest4

0.47

MutPred

0.24

Loss of glycosylation at P1138 (P = 0.0032)

MVP

0.78

MPC

0.093

ClinPred

0.27

GERP RS

5.1

Varity_R

0.25

gMVP

0.56

Mutation Taster

=82/18

polymorphism

(source)

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

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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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over