1-160120884-T-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000702.4(ATP1A2):c.13-22T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 1 in 1,566,934 control chromosomes in the GnomAD database, including 783,344 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 1.0 (76103 hom., cov: 33)
  • Exomes 𝑓: 1.0 (707241 hom.)
• Consequence: ATP1A2 NM_000702.4 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -2.33

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 1-160120884-T-C is Benign according to our data. Variant chr1-160120884-T-C is described in ClinVar as [Benign]. Clinvar id is 670739.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-160120884-T-C is described in Lovd as [Benign].
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.994 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP1A2	NM_000702.4	c.13-22T>C		intron_variant		ENST00000361216.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP1A2	ENST00000361216.8	c.13-22T>C		intron_variant		1	NM_000702.4	P1
ATP1A2	ENST00000392233.7	c.13-22T>C		intron_variant		5
ATP1A2	ENST00000472488.5	n.116-22T>C		intron_variant, non_coding_transcript_variant		2
ATP1A2	ENST00000478587.1	n.112-22T>C		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes AF: 1.00 AC: 152148 AN: 152208 Hom.: 76044 Cov.: 33

Gnomad AFR AF: 0.999

Gnomad AMI AF: 1.00

Gnomad AMR AF: 1.00

Gnomad ASJ AF: 1.00

Gnomad EAS AF: 1.00

Gnomad SAS AF: 1.00

Gnomad FIN AF: 1.00

Gnomad MID AF: 1.00

Gnomad NFE AF: 1.00

Gnomad OTH AF: 1.00

GnomAD3 exomes AF: 1.00 AC: 171634 AN: 171648 Hom.: 85810 AF XY: 1.00 AC XY: 91424 AN XY: 91432

Gnomad AFR exome AF: 0.999

Gnomad AMR exome AF: 1.00

Gnomad ASJ exome AF: 1.00

Gnomad EAS exome AF: 1.00

Gnomad SAS exome AF: 1.00

Gnomad FIN exome AF: 1.00

Gnomad NFE exome AF: 1.00

Gnomad OTH exome AF: 1.00

GnomAD4 exome AF: 1.00 AC: 1414545 AN: 1414608 Hom.: 707241 Cov.: 39 AF XY: 1.00 AC XY: 699476 AN XY: 699514

Gnomad4 AFR exome AF: 0.999

Gnomad4 AMR exome AF: 1.00

Gnomad4 ASJ exome AF: 1.00

Gnomad4 EAS exome AF: 1.00

Gnomad4 SAS exome AF: 1.00

Gnomad4 FIN exome AF: 1.00

Gnomad4 NFE exome AF: 1.00

Gnomad4 OTH exome AF: 1.00

GnomAD4 genome AF: 1.00 AC: 152266 AN: 152326 Hom.: 76103 Cov.: 33 AF XY: 1.00 AC XY: 74448 AN XY: 74480

Gnomad4 AFR AF: 0.999

Gnomad4 AMR AF: 1.00

Gnomad4 ASJ AF: 1.00

Gnomad4 EAS AF: 1.00

Gnomad4 SAS AF: 1.00

Gnomad4 FIN AF: 1.00

Gnomad4 NFE AF: 1.00

Gnomad4 OTH AF: 1.00

Alfa AF: 1.00 Hom.: 13750

Bravo AF: 1.00

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Fetal akinesia, respiratory insufficiency, microcephaly, polymicrogyria, and dysmorphic facies Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Dec 05, 2021

- -

Developmental and epileptic encephalopathy 98 Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Dec 05, 2021

- -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Jun 14, 2018

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Migraine, familial hemiplegic, 2 Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Dec 05, 2021

- -

Alternating hemiplegia of childhood 1 Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Jul 14, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
Cadd	Benign	0.024
Dann	Benign	0.23

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

LitVar

Other links and lift over

dbSNP: rs2854246; hg19: chr1-160090674;