rs202017613

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_016529.6(ATP8A2):c.2333G>A(p.Arg778Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000571 in 1,613,636 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R778W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00040 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00059 ( 2 hom. )

Consequence

ATP8A2
NM_016529.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 10.0

Variant links:

Genes affected

ATP8A2 (HGNC:13533): (ATPase phospholipid transporting 8A2) The protein encoded by this gene is a member of the P4 ATPase family of proteins, which are thought to be involved in a process called lipid flipping, whereby phospholipids are translocated inwards from the exoplasmic leaflet to the cytosolic leaflet of the cell membrane, which aids in generating and maintaining asymmetry in membrane lipids. This protein is predicted to contain an E1 E2 ATPase, a haloacid dehalogenase-like hydrolase (HAD) domain, and multiple transmembrane domains. Associations between this protein and cell cycle control protein 50A are important for translocation of phosphatidylserine across membranes. Mutations in this gene have been associated with a syndrome (CAMRQ4) characterized by cerebellar ataxia and cognitive disabilities. In addition, a translocation breakpoint within this gene was observed in an individual with neurological dysfunction. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2017]

ATP8A2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.2591774).

BP6

Variant 13-25699294-G-A is Benign according to our data. Variant chr13-25699294-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 522654.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP8A2	NM_016529.6 linkuse as main transcript	c.2333G>A	p.Arg778Gln	missense_variant	25/37	ENST00000381655.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP8A2	ENST00000381655.7 linkuse as main transcript	c.2333G>A	p.Arg778Gln	missense_variant	25/37	1	NM_016529.6		Q9NTI2-4

Frequencies

GnomAD3 genomes

AF:

0.000401

AC:

AN:

152102

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00144

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000706

Gnomad OTH

AF:

0.000955

GnomAD3 exomes

AF:

0.000434

AC:

108

AN:

248764

Hom.:

AF XY:

0.000445

AC XY:

AN XY:

134970

show subpopulations

Gnomad AFR exome

AF:

0.000129

Gnomad AMR exome

AF:

0.0000874

Gnomad ASJ exome

AF:

0.00109

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000492

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000647

Gnomad OTH exome

AF:

0.000663

GnomAD4 exome

AF:

0.000588

AC:

860

AN:

1461416

Hom.:

Cov.:

AF XY:

0.000605

AC XY:

440

AN XY:

726974

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.0000672

Gnomad4 ASJ exome

AF:

0.000918

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000682

Gnomad4 OTH exome

AF:

0.000431

GnomAD4 genome

AF:

0.000401

AC:

AN:

152220

Hom.:

Cov.:

AF XY:

0.000309

AC XY:

AN XY:

74432

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00144

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000623

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000706

Gnomad4 OTH

AF:

0.000945

Alfa

AF:

0.000716

Hom.:

Bravo

AF:

0.000389

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.000254

AC:

ESP6500EA

AF:

0.000241

AC:

ExAC

AF:

0.000314

AC:

EpiCase

AF:

0.000764

EpiControl

AF:

0.000415

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 25, 2022

The c.2333G>A (p.R778Q) alteration is located in exon 25 (coding exon 25) of the ATP8A2 gene. This alteration results from a G to A substitution at nucleotide position 2333, causing the arginine (R) at amino acid position 778 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Cerebellar ataxia, intellectual disability, and dysequilibrium syndrome 4

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Research Center, Shahid Beheshti University of Medical Sciences

May 03, 2020

- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 13, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Uncertain

-0.070

Cadd

Pathogenic

Dann

Pathogenic

1.0

Eigen

Pathogenic

0.73

Eigen_PC

Pathogenic

0.74

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.94

D;D

M_CAP

Uncertain

0.15

MetaRNN

Benign

0.26

T;T

MetaSVM

Uncertain

0.12

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.78

PROVEAN

Uncertain

-2.7

D;.

REVEL

Uncertain

0.56

Sift

Uncertain

0.015

D;.

Sift4G

Benign

0.063

T;D

Vest4

0.77

MVP

0.85

MPC

0.70

ClinPred

0.47

GERP RS

5.0

Varity_R

0.32

gMVP

0.76

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over