chr19-41966960-C-T

Position:

• chr19-41966960-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_152296.5(ATP1A3):​c.3019G>A​(p.Val1007Met) variant causes a missense change. The variant allele was found at a frequency of 0.000000715 in 1,399,388 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: ATP1A3 NM_152296.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.94

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.42156827).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP1A3	NM_152296.5	c.3019G>A	p.Val1007Met	missense_variant	23/23	ENST00000648268.1
ATP1A3	NM_001256214.2	c.3058G>A	p.Val1020Met	missense_variant	23/23
ATP1A3	NM_001256213.2	c.3052G>A	p.Val1018Met	missense_variant	23/23
ATP1A3	XM_047438862.1	c.2929G>A	p.Val977Met	missense_variant	23/23

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP1A3	ENST00000648268.1	c.3019G>A	p.Val1007Met	missense_variant	23/23		NM_152296.5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 7.15e-7 AC: 1 AN: 1399388 Hom.: 0 Cov.: 36 AF XY: 0.00000145 AC XY: 1 AN XY: 690196

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 9.27e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dystonia 12 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 23, 2023

This variant has not been reported in the literature in individuals affected with ATP1A3-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 1007 of the ATP1A3 protein (p.Val1007Met). 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. 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 expected to disrupt ATP1A3 protein function. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.32
BayesDel_addAF	Uncertain	0.16	D
BayesDel_noAF	Uncertain	-0.010
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.21	T;T;T;.;.
Eigen	Benign	0.12
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.94	.;D;D;D;D
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.42	T;T;T;T;T
MetaSVM	Uncertain	0.71	D
MutationTaster	Benign	1.0	D;D;D
PROVEAN	Benign	-0.81	.;N;.;N;N
REVEL	Uncertain	0.48
Sift	Benign	0.060	.;T;.;T;T
Sift4G	Benign	0.15	.;T;T;T;T
Polyphen		0.17	B;B;.;.;.
Vest4		0.44, 0.46, 0.47, 0.49
MutPred		0.26		Gain of disorder (P = 0.0637);Gain of disorder (P = 0.0637);.;.;.;
MVP		0.89
MPC		2.3
ClinPred		0.96	D
GERP RS		3.1
Varity_R		0.079
gMVP		0.73

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-42471112;