1-160135242-G-T

Position:

chr1-160135242-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 7P and 4B. PM1PM2PP2PP3_ModerateBS2

The NM_000702.4(ATP1A2):c.2062G>T(p.Ala688Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

ATP1A2
NM_000702.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 9.98

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_000702.4

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ATP1A2. . Gene score misZ 4.7713 (greater than the threshold 3.09). Trascript score misZ 6.824 (greater than threshold 3.09). GenCC has associacion of gene with fetal akinesia, respiratory insufficiency, microcephaly, polymicrogyria, and dysmorphic facies, alternating hemiplegia of childhood, hemiplegic migraine-developmental and epileptic encephalopathy spectrum, familial or sporadic hemiplegic migraine, alternating hemiplegia of childhood 1, developmental and epileptic encephalopathy 98, migraine, familial hemiplegic, 2.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.914

BS2

High AC in GnomAdExome4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP1A2	NM_000702.4 linkuse as main transcript	c.2062G>T	p.Ala688Ser	missense_variant	15/23	ENST00000361216.8
ATP1A2	XM_047421286.1 linkuse as main transcript	c.1171G>T	p.Ala391Ser	missense_variant	8/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
ATP1A2	ENST00000361216.8 linkuse as main transcript	c.2062G>T	p.Ala688Ser	missense_variant	15/23	1	NM_000702.4	P1
ATP1A2	ENST00000392233.7 linkuse as main transcript	c.2062G>T	p.Ala688Ser	missense_variant	15/23	5
ATP1A2	ENST00000447527.1 linkuse as main transcript	c.1195G>T	p.Ala399Ser	missense_variant	8/16	2
ATP1A2	ENST00000472488.5 linkuse as main transcript	n.2165G>T		non_coding_transcript_exon_variant	15/20	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000796

AC:

AN:

251356

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135824

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1461894

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 03, 2022

The c.2062G>T (p.A688S) alteration is located in exon 15 (coding exon 15) of the ATP1A2 gene. This alteration results from a G to T substitution at nucleotide position 2062, causing the alanine (A) at amino acid position 688 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Familial hemiplegic migraine

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Sep 20, 2023

This sequence change replaces alanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 688 of the ATP1A2 protein (p.Ala688Ser). This variant is present in population databases (rs200425518, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with ATP1A2-related conditions. ClinVar contains an entry for this variant (Variation ID: 575386). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt ATP1A2 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Migraine, familial hemiplegic, 2;C3549447:Alternating hemiplegia of childhood 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.72

BayesDel_addAF

Pathogenic

0.23

BayesDel_noAF

Pathogenic

0.27

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.81

D;.

Eigen

Uncertain

0.48

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.94

D;D

M_CAP

Uncertain

0.14

MetaRNN

Pathogenic

0.91

D;D

MetaSVM

Benign

-0.54

MutationAssessor

Uncertain

2.1

M;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.71

PROVEAN

Benign

-2.3

N;N

REVEL

Pathogenic

0.85

Sift

Pathogenic

0.0

D;D

Sift4G

Uncertain

0.012

D;D

Polyphen

0.99

D;.

Vest4

0.74

MutPred

0.85

Gain of disorder (P = 0.0499);Gain of disorder (P = 0.0499);

MVP

0.86

MPC

1.4

ClinPred

0.94

GERP RS

4.5

Varity_R

0.48

gMVP

0.94

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over