1-203683266-G-A

Position:

• chr1-203683266-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_001684.5(ATP2B4):​c.61G>A​(p.Asp21Asn) variant causes a missense change. The variant allele was found at a frequency of 0.00000958 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D21A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: ATP2B4 NM_001684.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.47

Genes affected

ATP2B4 (HGNC:817): (ATPase plasma membrane Ca2+ transporting 4) The protein encoded by this gene belongs to the family of P-type primary ion transport ATPases characterized by the formation of an aspartyl phosphate intermediate during the reaction cycle. These enzymes remove bivalent calcium ions from eukaryotic cells against very large concentration gradients and play a critical role in intracellular calcium homeostasis. The mammalian plasma membrane calcium ATPase isoforms are encoded by at least four separate genes and the diversity of these enzymes is further increased by alternative splicing of transcripts. The expression of different isoforms and splice variants is regulated in a developmental, tissue- and cell type-specific manner, suggesting that these pumps are functionally adapted to the physiological needs of particular cells and tissues. This gene encodes the plasma membrane calcium ATPase isoform 4. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.25740808).
• BS2: High AC in GnomAdExome4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP2B4	NM_001684.5	c.61G>A	p.Asp21Asn	missense_variant	2/21	ENST00000357681.10
ATP2B4	NM_001001396.3	c.61G>A	p.Asp21Asn	missense_variant	2/22
ATP2B4	NM_001365783.2	c.61G>A	p.Asp21Asn	missense_variant	2/21
ATP2B4	NM_001365784.2	c.61G>A	p.Asp21Asn	missense_variant	2/21

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP2B4	ENST00000357681.10	c.61G>A	p.Asp21Asn	missense_variant	2/21	1	NM_001684.5	A1
ATP2B4	ENST00000341360.7	c.61G>A	p.Asp21Asn	missense_variant	2/22	1		P4
ATP2B4	ENST00000705901.1	c.61G>A	p.Asp21Asn	missense_variant	2/21

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000958 AC: 14 AN: 1461892 Hom.: 0 Cov.: 29 AF XY: 0.00000413 AC XY: 3 AN XY: 727248

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000126

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 06, 2022

The c.61G>A (p.D21N) alteration is located in exon 2 (coding exon 1) of the ATP2B4 gene. This alteration results from a G to A substitution at nucleotide position 61, causing the aspartic acid (D) at amino acid position 21 to be replaced by an asparagine (N). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.030	T
BayesDel_noAF	Benign	-0.28
CADD	Uncertain	24
DANN	Uncertain	0.99
Eigen	Benign	0.013
Eigen_PC	Benign	0.097
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.91	D;D;.
M_CAP	Benign	0.041	D
MetaRNN	Benign	0.26	T;T;T
MetaSVM	Uncertain	0.20	D
MutationAssessor	Benign	1.5	L;L;L
MutationTaster	Benign	0.98	D;D;D;D;D
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-1.1	N;N;N
REVEL	Benign	0.26
Sift	Benign	0.14	T;T;T
Sift4G	Benign	0.20	T;T;T
Polyphen		0.022	B;.;.
Vest4		0.17
MutPred		0.33		Loss of helix (P = 0.028);Loss of helix (P = 0.028);Loss of helix (P = 0.028);
MVP		0.77
MPC		0.60
ClinPred		0.59	D
GERP RS		5.1
gMVP		0.47

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: rs1030977850; hg19: chr1-203652394;