chrX-40588998-A-G

Position:

• chrX-40588998-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005765.3(ATP6AP2):​c.50A>G​(p.Asn17Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. N17N) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 23)
• Consequence: ATP6AP2 NM_005765.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 5.57

Genes affected

ATP6AP2 (HGNC:18305): (ATPase H+ transporting accessory protein 2) This gene encodes a protein that is associated with adenosine triphosphatases (ATPases). Proton-translocating ATPases have fundamental roles in energy conservation, secondary active transport, acidification of intracellular compartments, and cellular pH homeostasis. There are three classes of ATPases- F, P, and V. The vacuolar (V-type) ATPases have a transmembrane proton-conducting sector and an extramembrane catalytic sector. The encoded protein has been found associated with the transmembrane sector of the V-type ATPases. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.24553585).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP6AP2	NM_005765.3	c.50A>G	p.Asn17Ser	missense_variant	2/9	ENST00000636580.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP6AP2	ENST00000636580.2	c.50A>G	p.Asn17Ser	missense_variant	2/9	1	NM_005765.3	P3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Syndromic X-linked intellectual disability Hedera type Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 03, 2019

This sequence change replaces asparagine with serine at codon 17 of the ATP6AP2 protein (p.Asn17Ser). The asparagine residue is moderately conserved and there is a small physicochemical difference between asparagine and serine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with ATP6AP2-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Feb 08, 2022

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.77
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.12	T;.;T;.;.;T;.;T
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.87	D;D;D;D;D;D;D;D
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.25	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.55	T
MutationAssessor	Benign	1.5	L;L;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;N;N;N
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-1.2	.;.;.;N;.;.;.;.
REVEL	Benign	0.11
Sift	Benign	0.046	.;.;.;D;.;.;.;.
Sift4G	Benign	0.51	.;.;.;T;.;.;.;.
Polyphen		0.29	B;.;.;.;.;B;.;.
Vest4		0.21
MutPred		0.34		Loss of solvent accessibility (P = 0.0238);Loss of solvent accessibility (P = 0.0238);Loss of solvent accessibility (P = 0.0238);Loss of solvent accessibility (P = 0.0238);Loss of solvent accessibility (P = 0.0238);Loss of solvent accessibility (P = 0.0238);Loss of solvent accessibility (P = 0.0238);Loss of solvent accessibility (P = 0.0238);
MVP		0.79
MPC		0.52
ClinPred		0.66	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.18
gMVP		0.71

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: rs1926552105; hg19: chrX-40448250;