chr13-25433839-G-A

Position:

• chr13-25433839-G-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_016529.6(ATP8A2):​c.77-35138G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.428 in 152,030 control chromosomes in the GnomAD database, including 14,678 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.43 (14678 hom., cov: 32)
• Consequence: ATP8A2 NM_016529.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.365

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.96).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.571 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ATP8A2	NM_016529.6	c.77-35138G>A		intron_variant		ENST00000381655.7	NP_057613.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ATP8A2	ENST00000381655.7	c.77-35138G>A		intron_variant		1	NM_016529.6	ENSP00000371070.2

Frequencies

GnomAD3 genomes AF: 0.428 AC: 65082 AN: 151912 Hom.: 14675 Cov.: 32

Gnomad AFR AF: 0.284

Gnomad AMI AF: 0.422

Gnomad AMR AF: 0.444

Gnomad ASJ AF: 0.425

Gnomad EAS AF: 0.588

Gnomad SAS AF: 0.455

Gnomad FIN AF: 0.448

Gnomad MID AF: 0.434

Gnomad NFE AF: 0.496

Gnomad OTH AF: 0.429

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.428 AC: 65119 AN: 152030 Hom.: 14678 Cov.: 32 AF XY: 0.427 AC XY: 31729 AN XY: 74308

Gnomad4 AFR AF: 0.284

Gnomad4 AMR AF: 0.444

Gnomad4 ASJ AF: 0.425

Gnomad4 EAS AF: 0.588

Gnomad4 SAS AF: 0.455

Gnomad4 FIN AF: 0.448

Gnomad4 NFE AF: 0.496

Gnomad4 OTH AF: 0.429

Alfa AF: 0.337 Hom.: 897

Bravo AF: 0.424

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.96
CADD	Benign	3.9
DANN	Benign	0.65

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: rs7322916; hg19: chr13-26007977;