11-47245501-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001610.4(ACP2):c.522G>C(p.Glu174Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: 33)
• Consequence: ACP2 NM_001610.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.385

Genes affected

ACP2 (HGNC:123): (acid phosphatase 2, lysosomal) The protein encoded by this gene belongs to the histidine acid phosphatase family, which hydrolyze orthophosphoric monoesters to alcohol and phosphate. This protein is localized to the lysosomal membrane, and is chemically and genetically distinct from the red cell acid phosphatase. Mice lacking this gene showed multiple defects, including bone structure alterations, lysosomal storage defects, and an increased tendency towards seizures. An enzymatically-inactive allele of this gene in mice showed severe growth retardation, hair-follicle abnormalities, and an ataxia-like phenotype. Alternatively spliced transcript variants have been found for this gene. A C-terminally extended isoform is also predicted to be produced by the use of an alternative in-frame translation termination codon via a stop codon readthrough mechanism. [provided by RefSeq, Oct 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.32140568).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACP2	NM_001610.4	c.522G>C	p.Glu174Asp	missense_variant	5/11	ENST00000672073.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACP2	ENST00000672073.1	c.522G>C	p.Glu174Asp	missense_variant	5/11		NM_001610.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

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

Aug 30, 2021

The c.522G>C (p.E174D) alteration is located in exon 5 (coding exon 5) of the ACP2 gene. This alteration results from a G to C substitution at nucleotide position 522, causing the glutamic acid (E) at amino acid position 174 to be replaced by an aspartic acid (D). 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
AlphaMissense	Benign	0.21
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.43
Cadd	Benign	19
Dann	Uncertain	0.99
DEOGEN2	Benign	0.15	T;T;T
Eigen	Benign	-0.40
Eigen_PC	Benign	-0.30
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.80	T;T;T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.32	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.9	L;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-0.92	N;N;N
REVEL	Benign	0.13
Sift	Benign	0.18	T;T;T
Sift4G	Benign	0.22	T;T;T
Polyphen		0.020	B;B;B
Vest4		0.55
MutPred		0.54		Loss of helix (P = 0.1299);.;.;
MVP		0.47
MPC		0.35
ClinPred		0.18	T
GERP RS		2.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.21
gMVP		0.69

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-47267052;