2-28783930-A-G

Position:

chr2-28783930-A-G

Variant summary

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

The NM_002709.3(PPP1CB):c.544A>G(p.Met182Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,612,616 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. M182K) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

PPP1CB
NM_002709.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:1U:2

Conservation

PhyloP100: 9.29

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:

SPDYA (HGNC:30613): (speedy/RINGO cell cycle regulator family member A) Enables protein kinase activator activity and protein kinase binding activity. Involved in several processes, including G1/S transition of mitotic cell cycle; positive regulation of cell population proliferation; and positive regulation of protein kinase activity. Located in nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

SPDYA 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 chr2-28783931-T-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 974912.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=1, Uncertain_significance=1}.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PPP1CB. . Gene score misZ 4.3319 (greater than the threshold 3.09). Trascript score misZ 4.7349 (greater than threshold 3.09). GenCC has associacion of gene with Noonan syndrome-like disorder with loose anagen hair 2, Noonan syndrome-like disorder with loose anagen hair.

BP4

Computational evidence support a benign effect (MetaRNN=0.24677843).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PPP1CB	NM_002709.3 linkuse as main transcript	c.544A>G	p.Met182Val	missense_variant	5/8	ENST00000395366.3
PPP1CB	NM_206876.2 linkuse as main transcript	c.544A>G	p.Met182Val	missense_variant	6/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PPP1CB	ENST00000395366.3 linkuse as main transcript	c.544A>G	p.Met182Val	missense_variant	5/8	1	NM_002709.3	P1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251350

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135850

show subpopulations

Gnomad AFR exome

AF:

0.0000615

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1460406

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726628

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jun 22, 2022	In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 03, 2023	This sequence change replaces methionine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 182 of the PPP1CB protein (p.Met182Val). This variant is present in population databases (rs768286092, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with PPP1CB-related conditions. ClinVar contains an entry for this variant (Variation ID: 981575). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PPP1CB protein function. 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. -

Noonan syndrome

Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Service de Génétique Moléculaire, Hôpital Robert Debré

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.31

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.40

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.74

.;D;D;D

Eigen

Benign

-0.045

Eigen_PC

Benign

0.13

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

D;D;.;.

M_CAP

Benign

0.021

MetaRNN

Benign

0.25

T;T;T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.39

.;N;N;N

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.79

PROVEAN

Uncertain

-2.5

N;N;N;N

REVEL

Benign

0.17

Sift

Uncertain

0.0010

D;D;D;D

Sift4G

Benign

0.20

T;T;T;T

Polyphen

0.067

.;B;B;B

Vest4

0.54, 0.54

MutPred

0.45

.;Loss of disorder (P = 0.0921);Loss of disorder (P = 0.0921);Loss of disorder (P = 0.0921);

MVP

0.55

MPC

1.8

ClinPred

0.49

GERP RS

3.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.53

gMVP

0.97

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