2-28752137-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_002709.3(PPP1CB):c.13G>C(p.Glu5Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000286 in 1,397,538 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 30)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

PPP1CB
NM_002709.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.14

Variant links:

Genes affected

PPP1CB (HGNC:9282): (protein phosphatase 1 catalytic subunit beta) The protein encoded by this gene is one of the three catalytic subunits of protein phosphatase 1 (PP1). PP1 is a serine/threonine specific protein phosphatase known to be involved in the regulation of a variety of cellular processes, such as cell division, glycogen metabolism, muscle contractility, protein synthesis, and HIV-1 viral transcription. Mouse studies suggest that PP1 functions as a suppressor of learning and memory. Two alternatively spliced transcript variants encoding distinct isoforms have been observed. [provided by RefSeq, Jul 2008]

PPP1CB links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant where missense usually causes diseases, PPP1CB

BP4

Computational evidence support a benign effect (MetaRNN=0.26110253).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PPP1CB	NM_002709.3 linkuse as main transcript	c.13G>C	p.Glu5Gln	missense_variant	1/8	ENST00000395366.3
PPP1CB	NM_206876.2 linkuse as main transcript	c.13G>C	p.Glu5Gln	missense_variant	2/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PPP1CB	ENST00000395366.3 linkuse as main transcript	c.13G>C	p.Glu5Gln	missense_variant	1/8	1	NM_002709.3	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000133

AC:

AN:

150402

Hom.:

AF XY:

0.00

AC XY:

AN XY:

79568

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000813

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000286

AC:

AN:

1397538

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

689316

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000841

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:

0.0000173

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

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

Invitae

Jul 10, 2023

This variant has not been reported in the literature in individuals affected with PPP1CB-related conditions. This sequence change replaces glutamic acid, which is acidic and polar, with glutamine, which is neutral and polar, at codon 5 of the PPP1CB protein (p.Glu5Gln). This variant is present in population databases (no rsID available, gnomAD 0.008%). 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

0.23

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.33

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Benign

-0.0064

Eigen_PC

Benign

0.15

FATHMM_MKL

Benign

0.38

LIST_S2

Uncertain

0.97

D;D;D;.;.

M_CAP

Benign

0.059

MetaRNN

Benign

0.26

T;T;T;T;T

MetaSVM

Benign

-1.0

MutationTaster

Benign

0.99

D;D;D

PrimateAI

Pathogenic

0.90

PROVEAN

Benign

-0.88

N;N;N;N;N

REVEL

Benign

0.13

Sift

Uncertain

0.028

D;D;D;D;D

Sift4G

Benign

0.19

T;T;T;T;T

Polyphen

0.0010

.;.;B;B;B

Vest4

0.26, 0.27

MutPred

0.20

Loss of disorder (P = 0.1795);Loss of disorder (P = 0.1795);Loss of disorder (P = 0.1795);Loss of disorder (P = 0.1795);Loss of disorder (P = 0.1795);

MVP

0.70

MPC

1.7

ClinPred

0.63

GERP RS

4.7

RBP_binding_hub_radar

1.1

RBP_regulation_power_radar

4.0

Varity_R

0.32

gMVP

0.79

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