19-41970538-GC-CA

Variant names:

• chr19-41970538-GC-CA
• NM_152296.5:c.2267_2268delGCinsTG
• ATP1A3 p.Arg756Leu

GermlineCancer (beta)

Variant summary

Our verdict is Likely pathogenic.

+9 Likely Pathogenic

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 9 classification points (ACMG Germline Pathogenicity v2019). PS1_ModeratePM1PM2PM5PP2

The NM_152296.5(ATP1A3):c.2267_2268delGCinsTG (p.Arg756Leu) variant causes a missense change. Note: allele frequency estimates from gnomAD may be inaccurate for this variant type (MNP or indel longer than 3 bp) due to technology limitations. The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. The affected nucleotide is highly conserved across species (PhyloP 100-way vertebrate score: 7.82). No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. A different missense at the same amino acid position has been reported as Pathogenic/Likely Pathogenic in ClinVar: p.R756H: Pathogenic/Likely_pathogenic (ClinVar VariationId 161134, 2 stars)

• Frequency: Genomes: not found (cov: 32)
• Consequence: ATP1A3 NM_152296.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.82
• Publications: 0 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: Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, Ambry Genetics
• ATP1A3-associated neurological disorder

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

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

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

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

Classification according to ACMG Germline Pathogenicity v2019

Classification was made for transcript:

Our verdict: Likely_pathogenic. The variant received 9 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	PS1Same amino acid change as known pathogenic		Same AA change, 0-star ClinVar pathogenic — moderate (PS1); ClinVar contains 1 P/LP entry with the same amino acid change (highest review level: 0 stars).
	PM1Mutational hot spot or critical domain		Missense neighbourhood hotspot (≥2 P/LP within ±8 AA, OR ≥ 5 vs. background) — PM1; In-domain: 0 pathogenic, 0 benign rare missense variants.; ±8 AA neighbourhood: 6 pathogenic, 0 benign (OR vs. background: 65.0).
	PM2Absent/extremely low in population databases		Absent from gnomAD (AD/XL gene) — PM2; Absent from gnomAD at well-covered site (MOI: AD+AR) (threshold 0.0001) — PM2 moderate.
	PM5Novel missense at known pathogenic residue		Different pathogenic missense at same AA residue in ClinVar (PM5); ClinVar contains a germline Pathogenic/Likely Pathogenic entry at the same amino acid position with a different amino acid change: p.R756H: Pathogenic/Likely_pathogenic (ClinVar VariationId 161134, 2 stars)
	PP2Missense in gene with low missense rate		Missense in gene constrained for missense variation where missense is common disease mechanism (PP2); Missense in a gene constrained for missense variation (gnomAD Z-score: 9.135). ClinVar shows strong pathogenic missense enrichment: 152 P/LP and 24 B/LB missense entries (ratio 6.3×).

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_152296.5. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	ATP1A3 NM_152296.5	MANE Select	c.2267_2268delGCinsTG p.Arg756Leu	missense	N/A	Prot: NP_689509.1 UniProt:
	ATP1A3 NM_001256214.2		c.2306_2307delGCinsTG p.Arg769Leu	missense	N/A	Prot: NP_001243143.1 UniProt:
	ATP1A3 NM_001256213.2		c.2300_2301delGCinsTG p.Arg767Leu	missense	N/A	Prot: NP_001243142.1 UniProt:

ATP1A3 NM_152296.5

MANE Select

HGVSc / HGVSpc.2267_2268delGCinsTGp.Arg756Leu

Exon rankN/A

missense

Prot: NP_689509.1UniProt: P13637-1

ATP1A3 NM_001256214.2

HGVSc / HGVSpc.2306_2307delGCinsTGp.Arg769Leu

Exon rankN/A

missense

Prot: NP_001243143.1UniProt: P13637-3

ATP1A3 NM_001256213.2

HGVSc / HGVSpc.2300_2301delGCinsTGp.Arg767Leu

Exon rankN/A

missense

Prot: NP_001243142.1UniProt: P13637-2

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	ATP1A3 ENST00000648268.1	MANE Select	c.2267_2268delGCinsTG p.Arg756Leu	missense	N/A	Prot: ENSP00000498113.1 UniProt:
	ENSG00000285505 ENST00000644613.1		n.2267_2268delGCinsTG	non_coding_transcript_exon	Exon 17 of 25	Prot: ENSP00000494711.1 UniProt:
	ATP1A3 ENST00000545399.6	TSL:2	c.2306_2307delGCinsTG p.Arg769Leu	missense	N/A	Prot: ENSP00000444688.1 UniProt:

ATP1A3 ENST00000648268.1

MANE Select

HGVSc / HGVSpc.2267_2268delGCinsTGp.Arg756Leu

Exon rankN/A

missense

Prot: ENSP00000498113.1UniProt: P13637-1

ENSG00000285505 ENST00000644613.1

HGVSc / HGVSpn.2267_2268delGCinsTG

Exon rankExon 17 of 25

non_coding_transcript_exon

Prot: ENSP00000494711.1UniProt: A0A2R8YEY8

ATP1A3 ENST00000545399.6

TSL:2

HGVSc / HGVSpc.2306_2307delGCinsTGp.Arg769Leu

Exon rankN/A

missense

Prot: ENSP00000444688.1UniProt: P13637-3

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 2 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:32
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:32

Showing 2 sources

Tested, but no data found:GnomAD4 exomeIf GnomAD4 is missing, the position is probably not covered by the project.

ClinVar

Not reported in ClinVar

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
PhyloP100	Pathogenic	7.8

Showing 1 of 1 scores

Splicing Scores

No splicing scores have been computed for this variant.

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

hg19: chr19-42474690;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar