rs557939077

Positions:

• chr19-41970494-G-A
• chr19-41970494-G-T

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP2 PP3_Moderate PP5_Moderate

The NM_152296.5(ATP1A3):​c.2312C>T​(p.Thr771Ile) 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 Pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T771N) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ATP1A3 NM_152296.5 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.88

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]

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PM1: In a transmembrane_region Helical (size 19) in uniprot entity AT1A3_HUMAN there are 11 pathogenic changes around while only 0 benign (100%) in NM_152296.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-41970494-G-T is described in Lovd as [Pathogenic].
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ATP1A3. . Gene score misZ 6.3327 (greater than the threshold 3.09). Trascript score misZ 9.1232 (greater than threshold 3.09). GenCC has associacion of gene with dystonia 12, alternating hemiplegia of childhood 2, ATP1A3-associated neurological disorder, developmental and epileptic encephalopathy 99, alternating hemiplegia of childhood, cerebellar ataxia-areflexia-pes cavus-optic atrophy-sensorineural hearing loss syndrome, alternating hemiplegia of childhood 1, encephalopathy, acute, infection-induced.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.914
• PP5: Variant 19-41970494-G-A is Pathogenic according to our data. Variant chr19-41970494-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 976730.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr19-41970494-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ATP1A3	NM_152296.5	c.2312C>T	p.Thr771Ile	missense_variant	17/23	ENST00000648268.1	NP_689509.1
ATP1A3	NM_001256214.2	c.2351C>T	p.Thr784Ile	missense_variant	17/23		NP_001243143.1
ATP1A3	NM_001256213.2	c.2345C>T	p.Thr782Ile	missense_variant	17/23		NP_001243142.1
ATP1A3	XM_047438862.1	c.2222C>T	p.Thr741Ile	missense_variant	17/23		XP_047294818.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ATP1A3	ENST00000648268.1	c.2312C>T	p.Thr771Ile	missense_variant	17/23		NM_152296.5	ENSP00000498113

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cerebellar ataxia-areflexia-pes cavus-optic atrophy-sensorineural hearing loss syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Institute of Human Genetics Munich, Klinikum Rechts Der Isar, TU München

Mar 02, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.31
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.73	D;D;T;.;.
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.89	.;D;D;D;D
M_CAP	Pathogenic	0.82	D
MetaRNN	Pathogenic	0.91	D;D;D;D;D
MetaSVM	Uncertain	0.61	D
MutationAssessor	Uncertain	2.0	M;M;.;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.88	D
PROVEAN	Uncertain	-4.3	.;D;.;D;D
REVEL	Pathogenic	0.95
Sift	Pathogenic	0.0	.;D;.;D;D
Sift4G	Uncertain	0.010	.;D;D;D;D
Polyphen		0.21	B;B;.;.;.
Vest4		0.97, 0.97, 0.97
MutPred		0.69		Loss of catalytic residue at T771 (P = 0.1584);Loss of catalytic residue at T771 (P = 0.1584);.;.;.;
MVP		0.98
MPC		2.6
ClinPred		1.0	D
GERP RS		3.8
Varity_R		0.71
gMVP		0.97

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

Publications

LitVar

Other links and lift over

dbSNP: rs557939077; hg19: chr19-42474646;