NM_001127222.2:c.3436G>A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001127222.2(CACNA1A):c.3436G>A(p.Val1146Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000236 in 1,526,056 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000014 ( 0 hom., cov: 29)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

CACNA1A
NM_001127222.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 3.56

Publications

1 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: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.17162156).

BS2

High AC in GnomAdExome4 at 34 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.3436G>A	p.Val1146Ile	missense	Exon 20 of 47	NP_001120694.1
CACNA1A	NM_001127221.2	MANE Plus Clinical	c.3439G>A	p.Val1147Ile	missense	Exon 20 of 47	NP_001120693.1
CACNA1A	NM_023035.3		c.3448G>A	p.Val1150Ile	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.3436G>A	p.Val1146Ile	missense	Exon 20 of 47	ENSP00000353362.5
CACNA1A	ENST00000638009.2	TSL:1 MANE Plus Clinical	c.3439G>A	p.Val1147Ile	missense	Exon 20 of 47	ENSP00000489913.1
CACNA1A	ENST00000638029.1	TSL:5	c.3448G>A	p.Val1150Ile	missense	Exon 20 of 48	ENSP00000489829.1

Frequencies

GnomAD3 genomes

AF:

0.0000143

AC:

AN:

139758

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000153

Gnomad OTH

AF:

0.000529

GnomAD2 exomes

AF:

0.0000160

AC:

AN:

187340

AF XY:

0.0000100

show subpopulations

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:

0.0000227

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000245

AC:

AN:

1386298

Hom.:

Cov.:

AF XY:

0.0000264

AC XY:

AN XY:

681724

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30848

American (AMR)

AF:

0.0000300

AC:

AN:

33378

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

21092

East Asian (EAS)

AF:

0.00

AC:

AN:

39068

South Asian (SAS)

AF:

0.0000406

AC:

AN:

73876

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50272

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5380

European-Non Finnish (NFE)

AF:

0.0000270

AC:

AN:

1075356

Other (OTH)

AF:

0.0000175

AC:

AN:

57028

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

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:

0.0000143

AC:

AN:

139758

Hom.:

Cov.:

AF XY:

0.0000298

AC XY:

AN XY:

67178

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

36606

American (AMR)

AF:

0.00

AC:

AN:

13366

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3362

East Asian (EAS)

AF:

0.00

AC:

AN:

4874

South Asian (SAS)

AF:

0.00

AC:

AN:

4418

European-Finnish (FIN)

AF:

0.00

AC:

AN:

8650

Middle Eastern (MID)

AF:

0.00

AC:

AN:

286

European-Non Finnish (NFE)

AF:

0.0000153

AC:

AN:

65412

Other (OTH)

AF:

0.000529

AC:

AN:

1892

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

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:

0.0000354

Hom.:

ExAC

AF:

0.0000251

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Apr 16, 2015

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Mar 11, 2020

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Oct 16, 2020

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 31719132)

not specified

Uncertain:1

Mar 21, 2017

Athena Diagnostics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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

Benign:1

Dec 19, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.51

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0093

Eigen

Benign

0.094

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.90

M_CAP

Benign

0.060

MetaRNN

Benign

0.17

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

PhyloP100

3.6

PrimateAI

Uncertain

0.64

PROVEAN

Benign

-0.28

REVEL

Benign

0.075

Sift

Benign

0.25

Sift4G

Benign

0.57

Vest4

0.26

MVP

0.52

MPC

0.046

ClinPred

0.63

GERP RS

5.3

Varity_R

0.14

gMVP

0.41

Mutation Taster

=93/7

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