chr13-25372236-C-G

Variant names:

• chr13-25372236-C-G
• NM_016529.6:c.24C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_016529.6(ATP8A2):​c.24C>G​(p.Asp8Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000152 in 1,316,976 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000015 (0 hom.)
• Consequence: ATP8A2 NM_016529.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.727
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• cerebellar ataxia, intellectual disability, and dysequilibrium

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• cerebellar ataxia, intellectual disability, and dysequilibrium syndrome 4

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12869269).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_016529.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP8A2	NM_016529.6	MANE Select	c.24C>G	p.Asp8Glu	missense	Exon 1 of 37	NP_057613.4
	ATP8A2	NM_001411005.1		c.24C>G	p.Asp8Glu	missense	Exon 1 of 36	NP_001397934.1	A0A804HKW9
	ATP8A2	NM_001411006.1		c.24C>G	p.Asp8Glu	missense	Exon 1 of 34	NP_001397935.1	A0A804HI09

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP8A2	ENST00000381655.7	TSL:1 MANE Select	c.24C>G	p.Asp8Glu	missense	Exon 1 of 37	ENSP00000371070.2	Q9NTI2-4
	ATP8A2	ENST00000281620.11	TSL:1	n.24C>G		non_coding_transcript_exon	Exon 1 of 38	ENSP00000281620.7	F8W9B3
	ATP8A2	ENST00000682472.1		c.24C>G	p.Asp8Glu	missense	Exon 1 of 36	ENSP00000508103.1	A0A804HKW9

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000152 AC: 2 AN: 1316976 Hom.: 0 Cov.: 31 AF XY: 0.00000308 AC XY: 2 AN XY: 649400

African (AFR) AF: 0.00 AC: 0 AN: 26210

American (AMR) AF: 0.00 AC: 0 AN: 26300

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 22384

East Asian (EAS) AF: 0.00 AC: 0 AN: 26526

South Asian (SAS) AF: 0.00 AC: 0 AN: 73002

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 46262

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5212

European-Non Finnish (NFE) AF: 0.00000193 AC: 2 AN: 1037738

Other (OTH) AF: 0.00 AC: 0 AN: 53342

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.61
CADD	Benign	18
DANN	Benign	0.79
Eigen	Benign	-0.68
Eigen_PC	Benign	-0.73
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.38	T
M_CAP	Pathogenic	0.62	D
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-1.1	T
PhyloP100		0.73
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-0.13	N
REVEL	Benign	0.014
Sift	Benign	1.0	T
Sift4G	Benign	0.99	T
Vest4		0.23
MutPred		0.23		Gain of helix (P = 0.0199)
MVP		0.49
MPC		0.52
ClinPred		0.33	T
GERP RS		1.6
PromoterAI		-0.082	Neutral
Varity_R		0.046
gMVP		0.28
Mutation Taster		=85/15	polymorphism

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

Other links and lift over

hg19: chr13-25946374;