Genetic Variant ENTPD8:p.Ala351Val (chr9-137435828-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001033113.2(ENTPD8):c.1052C>T(p.Ala351Val) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000685 in 1,460,910 control chromosomes in the GnomAD database, with no homozygous occurrence. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

ENTPD8
NM_001033113.2 missense, splice_region

Scores

Splicing: ADA: 0.8907

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.84

Variant links:

Genes affected

ENTPD8 (HGNC:24860): (ectonucleoside triphosphate diphosphohydrolase 8) Predicted to enable guanosine-diphosphatase activity and uridine-diphosphatase activity. Predicted to be involved in nucleoside diphosphate catabolic process. Predicted to act upstream of or within nucleoside diphosphate biosynthetic process and nucleoside monophosphate biosynthetic process. Predicted to be integral component of membrane. Predicted to be active in plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ENTPD8 links:

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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
ENTPD8	NM_001033113.2 link	c.1052C>T	p.Ala351Val	missense_variant, splice_region_variant	Exon 8 of 10	ENST00000371506.7	NP_001028285.1	Q5MY95-1
ENTPD8	NM_198585.3 link	c.1050+185C>T		intron_variant	Intron 7 of 8		NP_940987.2	Q5MY95-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ENTPD8	ENST00000371506.7 link	c.1052C>T	p.Ala351Val	missense_variant, splice_region_variant	Exon 8 of 10	5	NM_001033113.2	ENSP00000360561.2	Q5MY95-1
ENTPD8	ENST00000344119.6 link	c.1050+185C>T		intron_variant	Intron 7 of 8	1		ENSP00000344089.2	Q5MY95-2
ENTPD8	ENST00000461823.1 link	n.1850C>T		splice_region_variant, non_coding_transcript_exon_variant	Exon 6 of 8	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000522

AC:

AN:

248978

Hom.:

AF XY:

0.0000739

AC XY:

AN XY:

135362

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000720

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:

0.00000685

AC:

AN:

1460910

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

726852

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000302

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 11, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1052C>T (p.A351V) alteration is located in exon 8 (coding exon 7) of the ENTPD8 gene. This alteration results from a C to T substitution at nucleotide position 1052, causing the alanine (A) at amino acid position 351 to be replaced by a valine (V). 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

Pathogenic

0.65

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.17

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.19

T;T

Eigen

Pathogenic

0.75

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Uncertain

0.81

LIST_S2

Benign

0.75

T;.

M_CAP

Benign

0.054

MetaRNN

Uncertain

0.74

D;D

MetaSVM

Benign

-0.85

MutationAssessor

Pathogenic

3.1

M;M

PrimateAI

Benign

0.45

PROVEAN

Uncertain

-3.7

D;D

REVEL

Uncertain

0.37

Sift

Uncertain

0.0010

D;D

Sift4G

Benign

0.063

T;T

Polyphen

1.0

D;D

Vest4

0.69

MutPred

0.77

Loss of catalytic residue at A351 (P = 0.0672);Loss of catalytic residue at A351 (P = 0.0672);

MVP

0.24

MPC

0.36

ClinPred

0.79

GERP RS

4.2

Varity_R

0.78

gMVP

0.87

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.89

dbscSNV1_RF

Pathogenic

0.87

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

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