dbSNP rs199878645: PPP2R2B:p.Thr222Met (chr5-146638376-G-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -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

Publications

6 publications found

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 Gene-Disease associations (from GenCC):

spinocerebellar ataxia type 12
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet

PPP2R2B links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -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 VariationId is 3048492.Status of the report is no_assertion_criteria_provided, 0 stars.

BS2

High AC in GnomAd4 at 23 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_181675.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PPP2R2B	NM_181675.4	MANE Select	c.665C>T	p.Thr222Met	missense	Exon 7 of 10	NP_858061.3	Q00005-1
PPP2R2B	NM_181674.3		c.863C>T	p.Thr288Met	missense	Exon 7 of 10	NP_858060.2	Q00005-5
PPP2R2B	NM_001271900.2		c.839C>T	p.Thr280Met	missense	Exon 8 of 11	NP_001258829.1	Q00005-4

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PPP2R2B	ENST00000394411.9	TSL:2 MANE Select	c.665C>T	p.Thr222Met	missense	Exon 7 of 10	ENSP00000377933.3	Q00005-1
PPP2R2B	ENST00000394414.5	TSL:1	c.863C>T	p.Thr288Met	missense	Exon 7 of 10	ENSP00000377936.1	Q00005-5
PPP2R2B	ENST00000394409.7	TSL:1	c.665C>T	p.Thr222Met	missense	Exon 6 of 9	ENSP00000377931.4	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

GnomAD2 exomes

AF:

0.000307

AC:

AN:

250682

AF XY:

0.000273

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 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

African (AFR)

AF:

0.0000299

AC:

AN:

33466

American (AMR)

AF:

0.00

AC:

AN:

44676

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26092

East Asian (EAS)

AF:

0.00373

AC:

148

AN:

39668

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86006

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53374

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

0.00000901

AC:

AN:

1110142

Other (OTH)

AF:

0.000979

AC:

AN:

60272

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000151

AC:

AN:

152338

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.0000481

AC:

AN:

41560

American (AMR)

AF:

0.0000653

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00328

AC:

AN:

5188

South Asian (SAS)

AF:

0.000207

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.468

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000254

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

ClinVar submissions

Significance:Likely benign

Revision:no assertion criteria provided

View on ClinVar

Pathogenic

VUS

Benign

Condition

PPP2R2B-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.69

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Uncertain

0.010

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.58

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.84

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

M_CAP

Uncertain

0.087

MetaRNN

Benign

0.025

MetaSVM

Benign

-0.35

MutationAssessor

Pathogenic

3.7

PhyloP100

9.5

PrimateAI

Pathogenic

0.87

PROVEAN

Pathogenic

-4.8

REVEL

Uncertain

0.51

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0010

Polyphen

0.89

Vest4

0.68

MVP

0.60

MPC

1.0

ClinPred

0.31

GERP RS

5.4

Varity_R

0.75

gMVP

0.25

Mutation Taster

=16/84

disease causing

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over