1-160129025-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 1P and 5B. PP2BP6BS1

The NM_000702.4(ATP1A2):c.1262G>A(p.Arg421Gln) variant causes a missense change. The variant allele was found at a frequency of 0.0000391 in 1,611,420 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. R421R) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

ATP1A2
NM_000702.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 5.82

Publications

5 publications found

Variant links:

Genes affected

ATP1A2 (HGNC:800): (ATPase Na+/K+ transporting subunit alpha 2) The protein encoded by this gene belongs to the family of P-type cation transport ATPases, and to the subfamily of Na+/K+ -ATPases. Na+/K+ -ATPase is an integral membrane protein responsible for establishing and maintaining the electrochemical gradients of Na and K ions across the plasma membrane. These gradients are essential for osmoregulation, for sodium-coupled transport of a variety of organic and inorganic molecules, and for electrical excitability of nerve and muscle. This enzyme is composed of two subunits, a large catalytic subunit (alpha) and a smaller glycoprotein subunit (beta). The catalytic subunit of Na+/K+ -ATPase is encoded by multiple genes. This gene encodes an alpha 2 subunit. Mutations in this gene result in familial basilar or hemiplegic migraines, and in a rare syndrome known as alternating hemiplegia of childhood. [provided by RefSeq, Oct 2008]

ATP1A2 Gene-Disease associations (from GenCC):

hemiplegic migraine-developmental and epileptic encephalopathy spectrum
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
migraine, familial hemiplegic, 2
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
alternating hemiplegia of childhood 1
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
developmental and epileptic encephalopathy 98
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
fetal akinesia, respiratory insufficiency, microcephaly, polymicrogyria, and dysmorphic facies
Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
alternating hemiplegia of childhood
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial or sporadic hemiplegic migraine
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ATP1A2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PP2

Missense variant in the ATP1A2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 63 curated pathogenic missense variants (we use a threshold of 10). The gene has 10 curated benign missense variants. Gene score misZ: 4.7713 (above the threshold of 3.09). Trascript score misZ: 6.824 (above the threshold of 3.09). GenCC associations: The gene is linked to developmental and epileptic encephalopathy 98, fetal akinesia, respiratory insufficiency, microcephaly, polymicrogyria, and dysmorphic facies, migraine, familial hemiplegic, 2, alternating hemiplegia of childhood, alternating hemiplegia of childhood 1, familial or sporadic hemiplegic migraine, hemiplegic migraine-developmental and epileptic encephalopathy spectrum.

BP6

Variant 1-160129025-G-A is Benign according to our data. Variant chr1-160129025-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 406194.We mark this variant Likely_benign, oryginal submission is: [Conflicting_classifications_of_pathogenicity].

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000118 (18/152282) while in subpopulation AFR AF = 0.000361 (15/41542). AF 95% confidence interval is 0.000222. There are 0 homozygotes in GnomAd4. There are 5 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATP1A2	NM_000702.4 link	c.1262G>A	p.Arg421Gln	missense_variant	Exon 10 of 23	ENST00000361216.8	NP_000693.1	P50993A0A0S2Z3W6
ATP1A2	XM_047421286.1 link	c.371G>A	p.Arg124Gln	missense_variant	Exon 3 of 16		XP_047277242.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ATP1A2	ENST00000361216.8 link	c.1262G>A	p.Arg421Gln	missense_variant	Exon 10 of 23	1	NM_000702.4	ENSP00000354490.3	P50993
ATP1A2	ENST00000392233.7 link	c.1262G>A	p.Arg421Gln	missense_variant	Exon 10 of 23	5		ENSP00000376066.3	B1AKY9
ATP1A2	ENST00000447527.1 link	c.392G>A	p.Arg131Gln	missense_variant	Exon 3 of 16	2		ENSP00000411705.1	H0Y7C1
ATP1A2	ENST00000472488.5 link	n.1365G>A		non_coding_transcript_exon_variant	Exon 10 of 20	2

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000362

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.0000529

AC:

AN:

245876

AF XY:

0.0000376

show subpopulations

Gnomad AFR exome

AF:

0.000316

Gnomad AMR exome

AF:

0.0000293

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000166

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000361

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000308

AC:

AN:

1459138

Hom.:

Cov.:

AF XY:

0.0000289

AC XY:

AN XY:

725580

show subpopulations

African (AFR)

AF:

0.000329

AC:

AN:

33408

American (AMR)

AF:

0.0000225

AC:

AN:

44406

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26058

East Asian (EAS)

AF:

0.0000253

AC:

AN:

39578

South Asian (SAS)

AF:

0.00

AC:

AN:

85770

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53280

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.0000279

AC:

AN:

1110630

Other (OTH)

AF:

0.0000166

AC:

AN:

60244

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

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:

0.000118

AC:

AN:

152282

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74448

show subpopulations

African (AFR)

AF:

0.000361

AC:

AN:

41542

American (AMR)

AF:

0.0000654

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000193

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.000473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

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:

0.000108

Hom.:

Bravo

AF:

0.000136

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Migraine, familial hemiplegic, 2;C3549447:Alternating hemiplegia of childhood 1;C5562015:Fetal akinesia, respiratory insufficiency, microcephaly, polymicrogyria, and dysmorphic facies;C5562017:Developmental and epileptic encephalopathy 98

Uncertain:1

Feb 11, 2022

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Uncertain:1

Jun 11, 2025

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Observed in the heterozygous state in an individual with younger-onset apparently sporadic small vessel disease stroke (PMID: 31719132); In silico analysis suggests that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 18184292, 31719132) -

Familial hemiplegic migraine

Benign:1

Dec 28, 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

0.13

BayesDel_addAF

Uncertain

0.061

BayesDel_noAF

Pathogenic

0.20

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.69

D;.

Eigen

Benign

0.16

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.91

D;D

M_CAP

Benign

0.044

MetaRNN

Uncertain

0.67

D;D

MetaSVM

Benign

-0.54

MutationAssessor

Benign

1.1

L;.

PhyloP100

5.8

PrimateAI

Pathogenic

0.81

PROVEAN

Uncertain

-2.5

N;N

REVEL

Uncertain

0.63

Sift

Benign

0.051

T;T

Sift4G

Benign

0.15

T;T

Polyphen

0.78

P;P

Vest4

0.81

MVP

0.97

MPC

1.2

ClinPred

0.10

GERP RS

4.1

Varity_R

0.38

gMVP

0.84

Mutation Taster

=69/31

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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.

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