NM_001640.4:c.727A>C

Variant names:

• chr3-49676498-A-C
• NM_001640.4:c.727A>C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001640.4(APEH):​c.727A>C​(p.Asn243His) 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. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 34)
• Consequence: APEH NM_001640.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.07

Genes affected

APEH (HGNC:586): (acylaminoacyl-peptide hydrolase) This gene encodes the enzyme acylpeptide hydrolase, which catalyzes the hydrolysis of the terminal acetylated amino acid preferentially from small acetylated peptides. The acetyl amino acid formed by this hydrolase is further processed to acetate and a free amino acid by an aminoacylase. This gene is located within the same region of chromosome 3 (3p21) as the aminoacylase gene, and deletions at this locus are also associated with a decrease in aminoacylase activity. The acylpeptide hydrolase is a homotetrameric protein of 300 kDa with each subunit consisting of 732 amino acid residues. It can play an important role in destroying oxidatively damaged proteins in living cells. Deletions of this gene locus are found in various types of carcinomas, including small cell lung carcinoma and renal cell carcinoma. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05029404).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
APEH	NM_001640.4	c.727A>C	p.Asn243His	missense_variant	Exon 7 of 22	ENST00000296456.10	NP_001631.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
APEH	ENST00000296456.10	c.727A>C	p.Asn243His	missense_variant	Exon 7 of 22	1	NM_001640.4	ENSP00000296456.5

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 41

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Oct 03, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.727A>C (p.N243H) alteration is located in exon 7 (coding exon 7) of the APEH gene. This alteration results from a A to C substitution at nucleotide position 727, causing the asparagine (N) at amino acid position 243 to be replaced by a histidine (H). 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	0.068
BayesDel_addAF	Benign	-0.29	T
BayesDel_noAF	Benign	-0.66
CADD	Benign	12
DANN	Benign	0.82
DEOGEN2	Benign	0.13	T;.;T;T
Eigen	Benign	-0.57
Eigen_PC	Benign	-0.37
FATHMM_MKL	Benign	0.52	D
LIST_S2	Benign	0.84	T;T;T;T
M_CAP	Benign	0.0032	T
MetaRNN	Benign	0.050	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.31	N;.;.;.
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.74	N;N;N;N
REVEL	Benign	0.036
Sift	Benign	1.0	T;T;T;T
Sift4G	Benign	1.0	T;T;T;T
Polyphen		0.0	B;.;.;B
Vest4		0.16
MutPred		0.28		Gain of sheet (P = 0.039);.;.;Gain of sheet (P = 0.039);
MVP		0.55
MPC		0.30
ClinPred		0.12	T
GERP RS		3.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.074
gMVP		0.29

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: chr3-49713931;