2-44201680-C-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_002706.6(PPM1B):c.481C>G(p.Gln161Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000508 in 1,614,168 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00028 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000027 ( 0 hom. )

Consequence

PPM1B
NM_002706.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.61

Variant links:

Genes affected

PPM1B (HGNC:9276): (protein phosphatase, Mg2+/Mn2+ dependent 1B) The protein encoded by this gene is a member of the PP2C family of Ser/Thr protein phosphatases. PP2C family members are known to be negative regulators of cell stress response pathways. This phosphatase has been shown to dephosphorylate cyclin-dependent kinases (CDKs), and thus may be involved in cell cycle control. Overexpression of this phosphatase is reported to cause cell-growth arrest or cell death. Alternative splicing results in multiple transcript variants encoding different isoforms. Additional transcript variants have been described, but currently do not represent full-length sequences. [provided by RefSeq, Jul 2008]

PPM1B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.045430392).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PPM1B	NM_002706.6 linkuse as main transcript	c.481C>G	p.Gln161Glu	missense_variant	2/6	ENST00000282412.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PPM1B	ENST00000282412.9 linkuse as main transcript	c.481C>G	p.Gln161Glu	missense_variant	2/6	1	NM_002706.6		O75688-1

Frequencies

GnomAD3 genomes

AF:

0.000283

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00101

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000676

AC:

AN:

251298

Hom.:

AF XY:

0.0000515

AC XY:

AN XY:

135800

show subpopulations

Gnomad AFR exome

AF:

0.000923

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000267

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.00102

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:

0.00000270

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.000282

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

74458

show subpopulations

Gnomad4 AFR

AF:

0.00101

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000285

Hom.:

Bravo

AF:

0.000355

ESP6500AA

AF:

0.00204

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000576

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Mar 08, 2019	The p.Gln161Glu variant (rs34745955) has not been reported in the medical literature, is not listed in gene-specific variant databases, nor has it been previously identified in our laboratory. It is listed in the NHLBI GO Exome Sequencing Project (ESP) with an overall allele frequency of 0.07% (identified in 9 out of 13,006 chromosomes), and in the Exome Aggregation Consortium (ExAC) browser with an overall frequency of 0.006% (identified in 7 out of 121,394 chromosomes). The glutamine at codon 161 is moderately conserved considering 13 species (Alamut software v2.8.1), and computational analyses return mixed results regarding the effect of this variant on PPM1B protein structure/function (SIFT: tolerated, PolyPhen2: benign, and Mutation Taster: disease causing). Thus, based on the available information, the clinical significance of the p.Gln161Glu variant cannot be determined with certainty. -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	May 09, 2022	The c.481C>G (p.Q161E) alteration is located in exon 2 (coding exon 1) of the PPM1B gene. This alteration results from a C to G substitution at nucleotide position 481, causing the glutamine (Q) at amino acid position 161 to be replaced by a glutamic acid (E). 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

Benign

0.073

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.57

Cadd

Benign

Dann

Benign

0.95

Eigen

Benign

-0.16

Eigen_PC

Benign

0.094

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.83

T;T;T;T;T

M_CAP

Benign

0.016

MetaRNN

Benign

0.045

T;T;T;T;T

MetaSVM

Benign

-1.0

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Uncertain

0.49

PROVEAN

Benign

-0.28

N;N;N;N;N

REVEL

Benign

0.078

Sift

Benign

0.57

T;T;T;T;T

Sift4G

Benign

0.94

T;T;T;T;T

Polyphen

0.0

.;.;B;B;.

Vest4

0.14, 0.15, 0.15

MVP

0.49

MPC

0.16

ClinPred

0.081

GERP RS

5.9

Varity_R

0.43

gMVP

0.45

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