Genetic Variant ENPP3:p.Pro218Leu (chr6-131674172-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_005021.5(ENPP3):c.653C>T(p.Pro218Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000044 in 1,545,264 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000024 ( 0 hom. )

Consequence

ENPP3
NM_005021.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.39

Variant links:

Genes affected

ENPP3 (HGNC:3358): (ectonucleotide pyrophosphatase/phosphodiesterase 3) The protein encoded by this gene belongs to a series of ectoenzymes that are involved in hydrolysis of extracellular nucleotides. These ectoenzymes possess ATPase and ATP pyrophosphatase activities and are type II transmembrane proteins. Expression of the related rat mRNA has been found in a subset of immature glial cells and in the alimentary tract. The corresponding rat protein has been detected in the pancreas, small intestine, colon, and liver. The human mRNA is expressed in glioma cells, prostate, and uterus. Expression of the human protein has been detected in uterus, basophils, and mast cells. Two transcript variants, one protein coding and the other non-protein coding, have been found for this gene. [provided by RefSeq, Oct 2015]

ENPP3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ENPP3	NM_005021.5 link	c.653C>T	p.Pro218Leu	missense_variant	Exon 8 of 25	ENST00000357639.8	NP_005012.2	O14638
ENPP3	XM_017010932.2 link	c.422C>T	p.Pro141Leu	missense_variant	Exon 6 of 23		XP_016866421.1
ENPP3	NR_133007.2 link	n.736C>T		non_coding_transcript_exon_variant	Exon 8 of 24
ENPP3	XM_011535897.2 link	c.-239C>T		upstream_gene_variant			XP_011534199.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ENPP3	ENST00000357639.8 link	c.653C>T	p.Pro218Leu	missense_variant	Exon 8 of 25	1	NM_005021.5	ENSP00000350265.3		O14638

Frequencies

GnomAD3 genomes

AF:

0.000230

AC:

AN:

152000

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000846

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000640

AC:

AN:

249838

Hom.:

AF XY:

0.0000445

AC XY:

AN XY:

134964

show subpopulations

Gnomad AFR exome

AF:

0.000986

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000237

AC:

AN:

1393264

Hom.:

Cov.:

AF XY:

0.0000187

AC XY:

AN XY:

696992

show subpopulations

Gnomad4 AFR exome

AF:

0.000974

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000255

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000345

GnomAD4 genome

AF:

0.000230

AC:

AN:

152000

Hom.:

Cov.:

AF XY:

0.000256

AC XY:

AN XY:

74236

show subpopulations

Gnomad4 AFR

AF:

0.000846

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000228

Hom.:

Bravo

AF:

0.000321

ExAC

AF:

0.0000906

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 10, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.653C>T (p.P218L) alteration is located in exon 8 (coding exon 8) of the ENPP3 gene. This alteration results from a C to T substitution at nucleotide position 653, causing the proline (P) at amino acid position 218 to be replaced by a leucine (L). 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

Uncertain

0.45

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Pathogenic

0.42

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.54

D;D;.

Eigen

Pathogenic

0.95

Eigen_PC

Pathogenic

0.86

FATHMM_MKL

Uncertain

0.95

LIST_S2

Pathogenic

0.99

.;D;D

M_CAP

Benign

0.069

MetaRNN

Uncertain

0.59

D;D;D

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

4.1

H;H;.

PrimateAI

Uncertain

0.74

PROVEAN

Pathogenic

-9.5

D;D;D

REVEL

Pathogenic

0.80

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.66

MVP

0.95

MPC

0.20

ClinPred

1.0

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.91

gMVP

0.91

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.36

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.36

Position offset: -10

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over