NM_152296.5:c.829G>A

Variant names:

• chr19-41985082-C-T
• rs80356533
• NM_152296.5:c.829G>A

Variant summary

Our verdict is Pathogenic. The variant received 17 ACMG points: 17P and 0B. PM1 PM2 PP2 PP3_Strong PP5_Very_Strong

The NM_152296.5(ATP1A3):​c.829G>A​(p.Glu277Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ATP1A3 NM_152296.5 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6 O:1
• Conservation: PhyloP100: 7.79
• Publications: 18 publications found

Genes affected

ATP1A3 (HGNC:801): (ATPase Na+/K+ transporting subunit alpha 3) 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 3 subunit. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2012]

ATP1A3 Gene-Disease associations (from GenCC):

• alternating hemiplegia of childhood 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• ATP1A3-associated neurological disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen, Illumina
• cerebellar ataxia-areflexia-pes cavus-optic atrophy-sensorineural hearing loss syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• developmental and epileptic encephalopathy 99

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• dystonia 12

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• encephalopathy, acute, infection-induced

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• alternating hemiplegia of childhood

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• complex neurodevelopmental disorder

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ENSG00000285505 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 17 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 6 uncertain in NM_152296.5
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the ATP1A3 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 110 curated pathogenic missense variants (we use a threshold of 10). The gene has 22 curated benign missense variants. Gene score misZ: 6.3327 (above the threshold of 3.09). Trascript score misZ: 9.1232 (above the threshold of 3.09). GenCC associations: The gene is linked to alternating hemiplegia of childhood 2, developmental and epileptic encephalopathy 99, ATP1A3-associated neurological disorder, cerebellar ataxia-areflexia-pes cavus-optic atrophy-sensorineural hearing loss syndrome, dystonia 12, alternating hemiplegia of childhood, encephalopathy, acute, infection-induced, complex neurodevelopmental disorder.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.984
• PP5: Variant 19-41985082-C-T is Pathogenic according to our data. Variant chr19-41985082-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 12911.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATP1A3	NM_152296.5	c.829G>A	p.Glu277Lys	missense_variant	Exon 8 of 23	ENST00000648268.1	NP_689509.1
ATP1A3	NM_001256214.2	c.868G>A	p.Glu290Lys	missense_variant	Exon 8 of 23		NP_001243143.1
ATP1A3	NM_001256213.2	c.862G>A	p.Glu288Lys	missense_variant	Exon 8 of 23		NP_001243142.1
ATP1A3	XM_047438862.1	c.739G>A	p.Glu247Lys	missense_variant	Exon 8 of 23		XP_047294818.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ATP1A3	ENST00000648268.1	c.829G>A	p.Glu277Lys	missense_variant	Exon 8 of 23		NM_152296.5	ENSP00000498113.1
ENSG00000285505	ENST00000644613.1	n.829G>A		non_coding_transcript_exon_variant	Exon 8 of 25			ENSP00000494711.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Dystonia 12 Pathogenic:5 Other:1

Apr 24, 2020

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid with lysine at codon 277 of the ATP1A3 protein (p.Glu277Lys). The glutamic acid residue is highly conserved and there is a small physicochemical difference between glutamic acid and lysine. This variant is not present in population databases (ExAC no frequency). This variant has been reported in individuals affected with rapid-onset dystonia-parkinsonism (RDP) as well as in an individual with alternating hemiplegia of childhood (AHC) (PMID: 15260953, 17282997, 20558373, 25439493). ClinVar contains an entry for this variant (Variation ID: 12911). This variant has been reported to affect ATP1A3 protein function (PMID: 15260953). For these reasons, this variant has been classified as Pathogenic. -

Jun 10, 2010

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

-

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Aug 08, 2023

3billion

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is not observed in the gnomAD v2.1.1 dataset. Predicted Consequence/Location: Missense changes are a common disease-causing mechanism. In silico tool predictions suggest damaging effect of the variant on gene or gene product [REVEL: 0.93 (>=0.6, sensitivity 0.68 and specificity 0.92); 3Cnet: 0.80 (>=0.6, sensitivity 0.72 and precision 0.9)]. Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000012911 /PMID: 15260953). Therefore, this variant is classified as Likely pathogenic according to the recommendation of ACMG/AMP guideline. -

May 16, 2023

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 01, 2022

Johns Hopkins Genomics, Johns Hopkins University

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This ATP1A3 variant (rs80356533) is absent from a large population dataset and has been reported in ClinVar. It has been reported in the literature in at least four unrelated individuals with DYT12. Three bioinformatic tools queried predict that this substitution would be damaging, and the glutamate residue at this position is strongly evolutionarily conserved across the vertebrate species assessed. p.Glu277Lys showed reduced survival in an in vitro cell viability assay (quabain sensitivity) and reduced protein expression in transiently transfected HEK293T cells. Bioinformatic analysis predicts that this missense variant would not affect normal exon 8 splicing, although this has not been confirmed experimentally to our knowledge. This variant is apparently de novo in this individual. We consider c.829G>A to be pathogenic. -

not provided Pathogenic:1

Jan 18, 2024

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Not observed in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 30363590, 25447930, 15260953, 25439493, 17282997, 29396171, 27835968, 30550795, 27577505, 24739246, 26417536, 22067897, 27313535, 31361359, 33451880, 26297560) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.40
CADD	Pathogenic	31
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.81	D;D;D;.;.;.
Eigen	Uncertain	0.68
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Pathogenic	1.0	.;D;D;D;D;D
M_CAP	Pathogenic	0.49	D
MetaRNN	Pathogenic	0.98	D;D;D;D;D;D
MetaSVM	Uncertain	0.76	D
MutationAssessor	Benign	1.3	L;L;.;.;.;.
PhyloP100		7.8
PrimateAI	Pathogenic	0.89	D
PROVEAN	Uncertain	-3.4	.;D;.;D;D;.
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	.;D;.;D;D;.
Sift4G	Pathogenic	0.0010	.;D;D;D;D;.
Polyphen		1.0	D;D;.;.;.;.
Vest4		0.85, 0.85, 0.85
MutPred		0.94		Gain of methylation at E277 (P = 0.0387);Gain of methylation at E277 (P = 0.0387);.;.;.;.;
MVP		0.99
MPC		2.7
ClinPred		1.0	D
GERP RS		4.3
Varity_R		0.95
gMVP		1.0
Mutation Taster		=1/99	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs80356533; hg19: chr19-42489234; COSMIC: COSV57486736; COSMIC: COSV57486736;