Variant 5-77211019-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 5P and 2B. PM2PM5PP2BP4_Moderate

The NM_003719.5(PDE8B):c.94G>A(p.Val32Met) 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. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V32?) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

PDE8B
NM_003719.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.242

Variant links:

Genes affected

PDE8B (HGNC:8794): (phosphodiesterase 8B) The protein encoded by this gene is a cyclic nucleotide phosphodiesterase (PDE) that catalyzes the hydrolysis of the second messenger cAMP. The encoded protein, which does not hydrolyze cGMP, is resistant to several PDE inhibitors. Defects in this gene are a cause of autosomal dominant striatal degeneration (ADSD). Several transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jul 2010]

PDE8B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr5-77211020-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 1184955.Status of the report is criteria_provided_single_submitter, 1 stars.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PDE8B. . Gene score misZ 2.9973 (greater than the threshold 3.09). Trascript score misZ 3.3776 (greater than threshold 3.09). GenCC has associacion of gene with pigmented nodular adrenocortical disease, primary, 3, autosomal dominant striatal neurodegeneration type 1, primary pigmented nodular adrenocortical disease, schizophrenia, striatal degeneration, autosomal dominant.

BP4

Computational evidence support a benign effect (MetaRNN=0.18592018).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PDE8B	NM_003719.5 linkuse as main transcript	c.94G>A	p.Val32Met	missense_variant	1/22	ENST00000264917.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PDE8B	ENST00000264917.10 linkuse as main transcript	c.94G>A	p.Val32Met	missense_variant	1/22	1	NM_003719.5	P1	O95263-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1396120

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

693280

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

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.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 24, 2023

This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 32 of the PDE8B protein (p.Val32Met). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with PDE8B-related conditions. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.50

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.035

.;.;T;.;.

Eigen

Benign

-0.43

Eigen_PC

Benign

-0.37

FATHMM_MKL

Benign

0.17

LIST_S2

Uncertain

0.87

D;D;D;D;D

M_CAP

Pathogenic

0.48

MetaRNN

Benign

0.19

T;T;T;T;T

MetaSVM

Benign

-0.81

MutationAssessor

Benign

0.0

N;N;N;N;N

MutationTaster

Benign

1.0

N;N;N;N;N

PrimateAI

Pathogenic

0.95

PROVEAN

Benign

0.040

N;N;N;N;N

REVEL

Benign

0.14

Sift

Benign

0.090

T;T;T;T;T

Sift4G

Benign

0.20

T;T;T;T;T

Polyphen

0.50

P;P;P;P;P

Vest4

0.17

MutPred

0.46

Loss of glycosylation at S31 (P = 0.1033);Loss of glycosylation at S31 (P = 0.1033);Loss of glycosylation at S31 (P = 0.1033);Loss of glycosylation at S31 (P = 0.1033);Loss of glycosylation at S31 (P = 0.1033);

MVP

0.39

MPC

1.1

ClinPred

0.29

GERP RS

1.8

Varity_R

0.069

gMVP

0.20

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over