chr4-101025914-T-C

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2PP2BP4

The NM_000944.5(PPP3CA):c.1517A>G(p.Glu506Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000313 in 1,595,816 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 (★).

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., cov: 31)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

PPP3CA
NM_000944.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.38

Variant links:

Genes affected

PPP3CA (HGNC:9314): (protein phosphatase 3 catalytic subunit alpha) Enables several functions, including ATPase binding activity; calmodulin binding activity; and calmodulin-dependent protein phosphatase activity. Involved in several processes, including calcineurin-NFAT signaling cascade; peptidyl-serine dephosphorylation; and response to calcium ion. Located in several cellular components, including cytosol; dendritic spine; and nucleoplasm. Part of calcineurin complex. Colocalizes with cytoplasmic side of plasma membrane. Implicated in developmental and epileptic encephalopathy 91. Biomarker of focal segmental glomerulosclerosis and schizophrenia. [provided by Alliance of Genome Resources, Apr 2022]

PPP3CA links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the PPP3CA gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 14 curated pathogenic missense variants (we use a threshold of 10). The gene has 5 curated benign missense variants. Gene score misZ: 3.6261 (above the threshold of 3.09). Trascript score misZ: 4.4954 (above the threshold of 3.09). GenCC associations: The gene is linked to epileptic encephalopathy, infantile or early childhood, 1, arthrogryposis, cleft palate, craniosynostosis, and impaired intellectual development, autosomal dominant non-syndromic intellectual disability, undetermined early-onset epileptic encephalopathy.

BP4

Computational evidence support a benign effect (MetaRNN=0.31390968).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PPP3CA	NM_000944.5 link	c.1517A>G	p.Glu506Gly	missense_variant	Exon 14 of 14	ENST00000394854.8	NP_000935.1	Q08209-1A0A0S2Z4C6
PPP3CA	NM_001130691.2 link	c.1487A>G	p.Glu496Gly	missense_variant	Exon 13 of 13		NP_001124163.1	Q08209-2A0A0S2Z4B5
PPP3CA	NM_001130692.2 link	c.1361A>G	p.Glu454Gly	missense_variant	Exon 12 of 12		NP_001124164.1	Q08209-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPP3CA	ENST00000394854.8 link	c.1517A>G	p.Glu506Gly	missense_variant	Exon 14 of 14	1	NM_000944.5	ENSP00000378323.3		Q08209-1

Frequencies

GnomAD3 genomes

AF:

0.0000269

AC:

AN:

148600

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000984

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:

0.00

GnomAD4 exome

AF:

6.91e-7

AC:

AN:

1447216

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

719604

show subpopulations

Gnomad4 AFR exome

AF:

0.0000303

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000269

AC:

AN:

148600

Hom.:

Cov.:

AF XY:

0.0000277

AC XY:

AN XY:

72322

show subpopulations

Gnomad4 AFR

AF:

0.0000984

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:

0.00

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Apr 25, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 506 of the PPP3CA protein (p.Glu506Gly). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with PPP3CA-related conditions. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. 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

0.096

BayesDel_addAF

Pathogenic

0.21

BayesDel_noAF

Uncertain

0.070

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.28

.;T;.;.;.

Eigen

Uncertain

0.60

Eigen_PC

Pathogenic

0.67

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

D;D;D;D;D

M_CAP

Benign

0.025

MetaRNN

Benign

0.31

T;T;T;T;T

MetaSVM

Benign

-0.82

MutationAssessor

Benign

1.0

.;L;.;.;.

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-1.3

N;N;N;N;N

REVEL

Uncertain

0.40

Sift

Uncertain

0.019

D;T;T;T;T

Sift4G

Benign

0.15

T;T;T;T;T

Polyphen

0.98, 0.99

.;D;.;D;D

Vest4

0.41

MutPred

0.11

.;Gain of glycosylation at S505 (P = 0.0463);.;.;.;

MVP

0.72

MPC

1.3

ClinPred

0.87

GERP RS

6.1

Varity_R

0.17

gMVP

0.68

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