dbSNP rs746981536: ENTPD8:p.Asp455His (chr9-137435039-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001033113.2(ENTPD8):c.1363G>C(p.Asp455His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,314 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D455N) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

ENTPD8
NM_001033113.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.44

Publications

4 publications found

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 was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.10111651).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ENTPD8	NM_001033113.2 link	c.1363G>C	p.Asp455His	missense_variant	Exon 10 of 10	ENST00000371506.7	NP_001028285.1	Q5MY95-1
ENTPD8	NM_198585.3 link	c.1252G>C	p.Asp418His	missense_variant	Exon 9 of 9		NP_940987.2	Q5MY95-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ENTPD8	ENST00000371506.7 link	c.1363G>C	p.Asp455His	missense_variant	Exon 10 of 10	5	NM_001033113.2	ENSP00000360561.2	Q5MY95-1
ENTPD8	ENST00000344119.6 link	c.1252G>C	p.Asp418His	missense_variant	Exon 9 of 9	1		ENSP00000344089.2	Q5MY95-2
ENTPD8	ENST00000461823.1 link	n.2161G>C		non_coding_transcript_exon_variant	Exon 8 of 8	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000403

AC:

AN:

248292

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.00000137

AC:

AN:

1460314

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726538

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000299

AC:

AN:

33476

American (AMR)

AF:

0.0000224

AC:

AN:

44684

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26104

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86238

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52148

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111852

Other (OTH)

AF:

0.00

AC:

AN:

60352

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.029673), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.400

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.00000826

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.57

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.16

.;T;T

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.69

FATHMM_MKL

Benign

0.38

LIST_S2

Uncertain

0.86

D;T;.

M_CAP

Benign

0.014

MetaRNN

Benign

0.10

T;T;T

MetaSVM

Benign

-0.98

MutationAssessor

Benign

1.2

.;L;L

PhyloP100

1.4

PrimateAI

Benign

0.35

PROVEAN

Benign

-2.3

N;N;N

REVEL

Benign

0.048

Sift

Uncertain

0.0010

D;D;D

Sift4G

Uncertain

0.0020

D;D;D

Polyphen

0.11

B;P;P

Vest4

0.17

MutPred

0.56

.;Loss of helix (P = 0.0558);Loss of helix (P = 0.0558);

MVP

0.067

MPC

0.37

ClinPred

0.37

GERP RS

2.0

Varity_R

0.17

gMVP

0.58

Mutation Taster

=85/15

polymorphism

(source)

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

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rs746981536

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over