chr19-41977948-T-A

Position:

• chr19-41977948-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_152296.5(ATP1A3):​c.1931A>T​(p.Gln644Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ATP1A3 NM_152296.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.99

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]

ENSG00000285505 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 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.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ATP1A3	NM_152296.5	c.1931A>T	p.Gln644Leu	missense_variant	14/23	ENST00000648268.1	NP_689509.1
ATP1A3	NM_001256214.2	c.1970A>T	p.Gln657Leu	missense_variant	14/23		NP_001243143.1
ATP1A3	NM_001256213.2	c.1964A>T	p.Gln655Leu	missense_variant	14/23		NP_001243142.1
ATP1A3	XM_047438862.1	c.1841A>T	p.Gln614Leu	missense_variant	14/23		XP_047294818.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ATP1A3	ENST00000648268.1	c.1931A>T	p.Gln644Leu	missense_variant	14/23		NM_152296.5	ENSP00000498113.1
ENSG00000285505	ENST00000644613.1	n.1931A>T		non_coding_transcript_exon_variant	14/25			ENSP00000494711.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

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

Apr 01, 2016

This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a ATP1A3-related disease. In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This sequence change replaces glutamine with leucine at codon 644 of the ATP1A3 protein (p.Gln644Leu). The glutamine residue is moderately conserved and there is a moderate physicochemical difference between glutamine and leucine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.29
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.65	D;D;T;.;.
Eigen	Benign	-0.024
Eigen_PC	Benign	0.15
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.93	.;D;D;D;D
M_CAP	Uncertain	0.19	D
MetaRNN	Uncertain	0.62	D;D;D;D;D
MetaSVM	Uncertain	0.31	D
MutationAssessor	Benign	1.1	L;L;.;.;.
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-3.9	.;D;.;D;D
REVEL	Pathogenic	0.70
Sift	Pathogenic	0.0	.;D;.;D;D
Sift4G	Benign	0.13	.;T;T;T;T
Polyphen		0.014	B;B;.;.;.
Vest4		0.56, 0.59, 0.56, 0.56
MutPred		0.50		Loss of sheet (P = 0.1158);Loss of sheet (P = 0.1158);.;.;.;
MVP		0.99
MPC		1.7
ClinPred		0.99	D
GERP RS		4.4
Varity_R		0.69
gMVP		0.90

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: rs1060500992; hg19: chr19-42482100;