chr17-79735361-A-G

Position:

• chr17-79735361-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_178543.5(ENPP7):​c.718A>G​(p.Asn240Asp) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ENPP7 NM_178543.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.13

Genes affected

ENPP7 (HGNC:23764): (ectonucleotide pyrophosphatase/phosphodiesterase 7) The protein encoded by this gene is an intestinal alkaline sphingomyelin phosphodiesterase that converts sphingomyelin to ceramide and phosphocholine. The encoded protein is anchored in the cell membrane, and it may function to protect the intestinal mucosa from inflammation and tumorigenesis. This protein is glycosylated and also exhibits lysophosphatidylcholine hydrolase activity. [provided by RefSeq, Oct 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.884

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ENPP7	NM_178543.5	c.718A>G	p.Asn240Asp	missense_variant	3/6	ENST00000328313.10	NP_848638.3
ENPP7	XM_011524737.2	c.811A>G	p.Asn271Asp	missense_variant	3/5		XP_011523039.2
ENPP7	XR_001752505.2	n.915A>G		non_coding_transcript_exon_variant	3/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ENPP7	ENST00000328313.10	c.718A>G	p.Asn240Asp	missense_variant	3/6	1	NM_178543.5	ENSP00000332656	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

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

Feb 13, 2024

The c.718A>G (p.N240D) alteration is located in exon 3 (coding exon 3) of the ENPP7 gene. This alteration results from a A to G substitution at nucleotide position 718, causing the asparagine (N) at amino acid position 240 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	0.17
BayesDel_addAF	Benign	-0.0060	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	15
DANN	Uncertain	1.0
Eigen	Uncertain	0.19
Eigen_PC	Benign	0.030
FATHMM_MKL	Uncertain	0.89	D
M_CAP	Benign	0.018	T
MetaRNN	Pathogenic	0.88	D
MetaSVM	Uncertain	-0.12	T
MutationTaster	Benign	1.0	D
PrimateAI	Benign	0.42	T
PROVEAN	Pathogenic	-4.7	D
REVEL	Uncertain	0.46
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.012	D
Vest4		0.37
MutPred		0.90		Loss of sheet (P = 0.0817);
MVP		0.69
MPC		0.25
ClinPred		0.99	D
GERP RS		1.4
gMVP		0.88

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: chr17-77709160;