5-146638376-G-A

Variant names:

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 1P and 9B. PP3BP4_StrongBP6BS2

The NM_181675.4(PPP2R2B):c.665C>T(p.Thr222Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000151 in 1,611,790 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00015 ( 2 hom. )

Consequence

PPP2R2B
NM_181675.4 missense

Scores

Clinical Significance

Likely benign no assertion criteria provided B:1

Conservation

PhyloP100: 9.46

Variant links:

Genes affected

PPP2R2B (HGNC:9305): (protein phosphatase 2 regulatory subunit Bbeta) The product of this gene belongs to the phosphatase 2 regulatory subunit B family. Protein phosphatase 2 is one of the four major Ser/Thr phosphatases, and it is implicated in the negative control of cell growth and division. It consists of a common heteromeric core enzyme, which is composed of a catalytic subunit and a constant regulatory subunit, that associates with a variety of regulatory subunits. The B regulatory subunit might modulate substrate selectivity and catalytic activity. This gene encodes a beta isoform of the regulatory subunit B55 subfamily. Defects in this gene cause autosomal dominant spinocerebellar ataxia 12 (SCA12), a disease caused by degeneration of the cerebellum, sometimes involving the brainstem and spinal cord, and in resulting in poor coordination of speech and body movements. Multiple alternatively spliced variants, which encode different isoforms, have been identified for this gene. The 5' UTR of some of these variants includes a CAG trinucleotide repeat sequence (7-28 copies) that can be expanded to 55-78 copies in cases of SCA12. [provided by RefSeq, Jul 2016]

PPP2R2B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 9: AlphaMissense, Cadd, Dann, Eigen, FATHMM_MKL, MutationAssessor, phyloP100way_vertebrate, PrimateAI, PROVEAN [when BayesDel_addAF, max_spliceai, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.025215566).

BP6

Variant 5-146638376-G-A is Benign according to our data. Variant chr5-146638376-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 3048492.Status of the report is no_assertion_criteria_provided, 0 stars.

BS2

High AC in GnomAd4 at 23 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PPP2R2B	NM_181675.4 link	c.665C>T	p.Thr222Met	missense_variant	Exon 7 of 10	ENST00000394411.9	NP_858061.3	Q00005-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPP2R2B	ENST00000394411.9 link	c.665C>T	p.Thr222Met	missense_variant	Exon 7 of 10	2	NM_181675.4	ENSP00000377933.3		Q00005-1

Frequencies

GnomAD3 genomes

AF:

0.000151

AC:

AN:

152220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00327

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000307

AC:

AN:

250682

Hom.:

AF XY:

0.000273

AC XY:

AN XY:

135474

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00387

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000328

GnomAD4 exome

AF:

0.000151

AC:

220

AN:

1459452

Hom.:

Cov.:

AF XY:

0.000154

AC XY:

112

AN XY:

726106

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00373

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000901

Gnomad4 OTH exome

AF:

0.000979

GnomAD4 genome

AF:

0.000151

AC:

AN:

152338

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00328

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000291

Hom.:

Bravo

AF:

0.000310

ExAC

AF:

0.000288

AC:

Asia WGS

AF:

0.00318

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

PPP2R2B-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 07, 2020

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.69

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Uncertain

0.010

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.58

D;.;.;D;.;.;.;.

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.84

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

.;.;D;D;D;D;D;D

M_CAP

Uncertain

0.087

MetaRNN

Benign

0.025

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.35

MutationAssessor

Pathogenic

3.7

H;.;.;H;.;.;.;.

PrimateAI

Pathogenic

0.87

PROVEAN

Pathogenic

-4.8

.;D;D;D;.;D;D;.

REVEL

Uncertain

0.51

Sift

Pathogenic

0.0

.;D;D;D;.;D;D;.

Sift4G

Pathogenic

0.0010

D;D;D;D;D;D;D;D

Polyphen

0.89

P;.;D;P;.;D;P;P

Vest4

0.68

MVP

0.60

MPC

1.0

ClinPred

0.31

GERP RS

5.4

Varity_R

0.75

gMVP

0.25

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

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