NM_001127222.2:c.6431C>T

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.6431C>T(p.Pro2144Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000186 in 1,399,502 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. P2144P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000019 ( 0 hom. )

Consequence

CACNA1A
NM_001127222.2 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 1.57

Publications

0 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:

ENSG00000300728 (HGNC:):

ENSG00000300728 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=0.09210405).

BS2

High AC in GnomAdExome4 at 24 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1A	NM_001127222.2 link	c.6431C>T	p.Pro2144Leu	missense_variant	Exon 45 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.6431C>T	p.Pro2144Leu	missense_variant	Exon 45 of 47	1	NM_001127222.2	ENSP00000353362.5	O00555-8
CACNA1A	ENST00000638029.1 link	c.6449C>T	p.Pro2150Leu	missense_variant	Exon 46 of 48	5		ENSP00000489829.1	A0A087WW63
CACNA1A	ENST00000573710.7 link	c.6437C>T	p.Pro2146Leu	missense_variant	Exon 45 of 47	5		ENSP00000460092.3	A0A1C7CYY9
CACNA1A	ENST00000635727.1 link	c.6434C>T	p.Pro2145Leu	missense_variant	Exon 45 of 47	5		ENSP00000490001.1	A0A1B0GU81
CACNA1A	ENST00000637769.1 link	c.6434C>T	p.Pro2145Leu	missense_variant	Exon 45 of 47	1		ENSP00000489778.1	A0A1B0GTN7
CACNA1A	ENST00000636012.1 link	c.6398C>T	p.Pro2133Leu	missense_variant	Exon 44 of 46	5		ENSP00000490223.1	A0A1B0GUS3
CACNA1A	ENST00000637736.1 link	c.6293C>T	p.Pro2098Leu	missense_variant	Exon 44 of 46	5		ENSP00000489861.1	A0A1B0GTW2
CACNA1A	ENST00000636389.1 link	c.6434C>T	p.Pro2145Leu	missense_variant	Exon 45 of 47	5		ENSP00000489992.1	A0A1B0GU74
CACNA1A	ENST00000637432.1 link	c.6449C>T	p.Pro2150Leu	missense_variant	Exon 46 of 48	5		ENSP00000490617.1	O00555-2
CACNA1A	ENST00000636549.1 link	c.6440C>T	p.Pro2147Leu	missense_variant	Exon 46 of 48	5		ENSP00000490578.1	B5TYJ1
CACNA1A	ENST00000637927.1 link	c.6437C>T	p.Pro2146Leu	missense_variant	Exon 45 of 47	5		ENSP00000489715.1	A0A1B0GTI4
CACNA1A	ENST00000635895.1 link	c.6434C>T	p.Pro2145Leu	missense_variant	Exon 45 of 47	5		ENSP00000490323.1	A0A384DVW2
CACNA1A	ENST00000638009.2 link	c.6434C>T	p.Pro2145Leu	missense_variant	Exon 45 of 47	1		ENSP00000489913.1	O00555-3
CACNA1A	ENST00000637276.1 link	c.6398C>T	p.Pro2133Leu	missense_variant	Exon 44 of 46	5		ENSP00000489777.1	O00555-5
CACNA1A	ENST00000636768.2 link	n.*697C>T		non_coding_transcript_exon_variant	Exon 43 of 45	5		ENSP00000490190.2	A0A1B0GUP3
CACNA1A	ENST00000713789.1 link	n.*1610C>T		non_coding_transcript_exon_variant	Exon 45 of 47			ENSP00000519091.1
CACNA1A	ENST00000636768.2 link	n.*697C>T		3_prime_UTR_variant	Exon 43 of 45	5		ENSP00000490190.2	A0A1B0GUP3
CACNA1A	ENST00000713789.1 link	n.*1610C>T		3_prime_UTR_variant	Exon 45 of 47			ENSP00000519091.1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000165

AC:

AN:

60752

AF XY:

0.0000320

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:

0.0000387

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000192

AC:

AN:

1247310

Hom.:

Cov.:

AF XY:

0.0000183

AC XY:

AN XY:

602602

show subpopulations

African (AFR)

AF:

0.0000383

AC:

AN:

26094

American (AMR)

AF:

0.00

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

17316

East Asian (EAS)

AF:

0.00

AC:

AN:

31176

South Asian (SAS)

AF:

0.0000190

AC:

AN:

52688

European-Finnish (FIN)

AF:

0.0000229

AC:

AN:

43646

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4636

European-Non Finnish (NFE)

AF:

0.0000209

AC:

AN:

1005564

Other (OTH)

AF:

0.00

AC:

AN:

50894

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74338

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000241

AC:

AN:

41454

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2094

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000203), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000266

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 06, 2017

Athena Diagnostics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Uncertain:1

May 30, 2017

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.P2145L variant (also known as c.6434C>T), located in coding exon 45 of the CACNA1A gene, results from a C to T substitution at nucleotide position 6434. The proline at codon 2145 is replaced by leucine, an amino acid with similar properties. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Nov 01, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; 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

- -

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

Benign:1

Nov 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.086

BayesDel_addAF

Benign

-0.029

BayesDel_noAF

Benign

-0.28

CADD

Benign

(source)

DANN

Benign

0.94

DEOGEN2

Benign

0.059

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

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.061

LIST_S2

Uncertain

0.88

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

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.092

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

MetaSVM

Benign

-0.84

MutationAssessor

Benign

2.0

.;.;.;.;M;.;.;.;.;.;.;.;.;.;.;.;.;.

PhyloP100

1.6

PrimateAI

Pathogenic

0.79

PROVEAN

Uncertain

-3.0

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

REVEL

Benign

0.20

Sift

Uncertain

0.027

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

Sift4G

Benign

0.079

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

Vest4

0.22

MutPred

0.23

.;.;Gain of MoRF binding (P = 0.0673);Gain of MoRF binding (P = 0.0673);Gain of MoRF binding (P = 0.0673);.;.;Gain of MoRF binding (P = 0.0673);.;.;.;.;Gain of MoRF binding (P = 0.0673);.;.;.;.;.;

MVP

0.79

MPC

0.27

ClinPred

0.070

GERP RS

-0.22

Varity_R

0.021

gMVP

0.25

Mutation Taster

=96/4

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

NM_001127222.2:c.6431C>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over