NM_001127222.2:c.2692G>A

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.2692G>A(p.Gly898Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00011 in 1,592,736 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. G898R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

CACNA1A
NM_001127222.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:5

Conservation

PhyloP100: 4.75

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: Benign. The variant received -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.21210161).

BP6

Variant 19-13298941-C-T is Benign according to our data. Variant chr19-13298941-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 572781.We mark this variant Likely_benign, oryginal submission is: [Conflicting_classifications_of_pathogenicity].

BS2

High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1A	NM_001127222.2 link	c.2692G>A	p.Gly898Ser	missense_variant	Exon 19 of 47	ENST00000360228.11	NP_001120694.1	O00555-8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CACNA1A	ENST00000360228.11 link	c.2692G>A	p.Gly898Ser	missense_variant	Exon 19 of 47	1	NM_001127222.2	ENSP00000353362.5	O00555-8
CACNA1A	ENST00000638029.1 link	c.2704G>A	p.Gly902Ser	missense_variant	Exon 19 of 48	5		ENSP00000489829.1	A0A087WW63
CACNA1A	ENST00000573710.7 link	c.2698G>A	p.Gly900Ser	missense_variant	Exon 19 of 47	5		ENSP00000460092.3	A0A1C7CYY9
CACNA1A	ENST00000635727.1 link	c.2695G>A	p.Gly899Ser	missense_variant	Exon 19 of 47	5		ENSP00000490001.1	A0A1B0GU81
CACNA1A	ENST00000637769.1 link	c.2695G>A	p.Gly899Ser	missense_variant	Exon 19 of 47	1		ENSP00000489778.1	A0A1B0GTN7
CACNA1A	ENST00000636012.1 link	c.2695G>A	p.Gly899Ser	missense_variant	Exon 19 of 46	5		ENSP00000490223.1	A0A1B0GUS3
CACNA1A	ENST00000637736.1 link	c.2554G>A	p.Gly852Ser	missense_variant	Exon 18 of 46	5		ENSP00000489861.1	A0A1B0GTW2
CACNA1A	ENST00000636389.1 link	c.2695G>A	p.Gly899Ser	missense_variant	Exon 19 of 47	5		ENSP00000489992.1	A0A1B0GU74
CACNA1A	ENST00000637432.1 link	c.2704G>A	p.Gly902Ser	missense_variant	Exon 19 of 48	5		ENSP00000490617.1	O00555-2
CACNA1A	ENST00000636549.1 link	c.2695G>A	p.Gly899Ser	missense_variant	Exon 19 of 48	5		ENSP00000490578.1	B5TYJ1
CACNA1A	ENST00000637927.1 link	c.2698G>A	p.Gly900Ser	missense_variant	Exon 19 of 47	5		ENSP00000489715.1	A0A1B0GTI4
CACNA1A	ENST00000635895.1 link	c.2695G>A	p.Gly899Ser	missense_variant	Exon 19 of 47	5		ENSP00000490323.1	A0A384DVW2
CACNA1A	ENST00000638009.2 link	c.2695G>A	p.Gly899Ser	missense_variant	Exon 19 of 47	1		ENSP00000489913.1	O00555-3
CACNA1A	ENST00000637276.1 link	c.2695G>A	p.Gly899Ser	missense_variant	Exon 19 of 46	5		ENSP00000489777.1	O00555-5
CACNA1A	ENST00000636768.2 link	n.2695G>A		non_coding_transcript_exon_variant	Exon 19 of 45	5		ENSP00000490190.2	A0A1B0GUP3
CACNA1A	ENST00000713789.1 link	n.2692G>A		non_coding_transcript_exon_variant	Exon 19 of 47			ENSP00000519091.1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152186

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000372

AC:

AN:

214956

AF XY:

0.0000418

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000121

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000410

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000118

AC:

170

AN:

1440550

Hom.:

Cov.:

AF XY:

0.000120

AC XY:

AN XY:

716688

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33310

American (AMR)

AF:

0.0000908

AC:

AN:

44038

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25934

East Asian (EAS)

AF:

0.00

AC:

AN:

39418

South Asian (SAS)

AF:

0.0000117

AC:

AN:

85268

European-Finnish (FIN)

AF:

0.00

AC:

AN:

38050

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5596

European-Non Finnish (NFE)

AF:

0.000140

AC:

155

AN:

1109018

Other (OTH)

AF:

0.000167

AC:

AN:

59918

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

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:

0.0000329

AC:

AN:

152186

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74340

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41446

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4838

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68024

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000583

Hom.:

Bravo

AF:

0.0000642

ExAC

AF:

0.00000852

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Migraine, familial hemiplegic, 1

Uncertain:1

Jul 18, 2022

Institute of Human Genetics, University of Leipzig Medical Center

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

_x000D_ Criteria applied: PP3, BS1 -

Intellectual disability

Uncertain:1

Apr 29, 2020

Cambridge Genomics Laboratory, East Genomic Laboratory Hub, NHS Genomic Medicine Service

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

Jul 09, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: CACNA1A c.2695G>A (p.Gly899Ser) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was detected at a frequency of 0.00011 in 1592736 control chromosomes, suggesting the variant could be benign. To our knowledge, no occurrence of c.2695G>A in individuals affected with Epileptic Encephalopathy, Early Infantile, 42 and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 572781). Based on the evidence outlined above, the variant was classified as likely benign. -

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

Benign:1

Oct 06, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Jun 24, 2019

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. -

not provided

Benign:1

Jul 29, 2020

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

CACNA1A-related disorder

Benign:1

Sep 05, 2023

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.084

BayesDel_addAF

Benign

-0.021

BayesDel_noAF

Uncertain

-0.040

CADD

Uncertain

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.0083

.;.;T;.;.;.;.;.;.;T;.;.;.;T;.

Eigen

Benign

-0.50

Eigen_PC

Benign

-0.59

FATHMM_MKL

Benign

0.71

LIST_S2

Uncertain

0.87

D;D;D;D;D;D;D;D;.;D;D;D;D;D;D

M_CAP

Pathogenic

0.93

MetaRNN

Benign

0.21

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.11

MutationAssessor

Benign

1.5

.;.;.;.;L;.;.;.;.;.;.;.;L;.;.

PhyloP100

4.8

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-0.28

.;N;.;.;.;.;.;.;.;.;.;.;.;.;.

REVEL

Uncertain

0.32

Sift

Benign

0.41

.;T;.;.;.;.;.;.;.;.;.;.;.;.;.

Sift4G

Benign

0.57

T;T;.;.;.;.;.;.;.;.;.;.;.;.;.

Vest4

0.11

MutPred

0.16

.;.;Gain of phosphorylation at G899 (P = 0.0057);Gain of phosphorylation at G899 (P = 0.0057);Gain of phosphorylation at G899 (P = 0.0057);.;Gain of phosphorylation at G899 (P = 0.0057);.;.;Gain of phosphorylation at G899 (P = 0.0057);Gain of phosphorylation at G899 (P = 0.0057);.;Gain of phosphorylation at G899 (P = 0.0057);.;Gain of phosphorylation at G899 (P = 0.0057);

MVP

0.94

MPC

1.1

ClinPred

0.13

GERP RS

3.0

Varity_R

0.071

gMVP

0.52

Mutation Taster

=86/14

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over