Genetic Variant PPP3CC:p.Pro19Ala (chr8-22474959-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_005605.5(PPP3CC):c.55C>G(p.Pro19Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000286 in 1,400,536 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

PPP3CC
NM_005605.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.81

Variant links:

Genes affected

PPP3CC (HGNC:9316): (protein phosphatase 3 catalytic subunit gamma) Calcineurin is a calcium-dependent, calmodulin-stimulated protein phosphatase involved in the downstream regulation of dopaminergic signal transduction. Calcineurin is composed of a regulatory subunit and a catalytic subunit. The protein encoded by this gene represents one of the regulatory subunits that has been found for calcineurin. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

PPP3CC 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;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PPP3CC	NM_005605.5 link	c.55C>G	p.Pro19Ala	missense_variant	Exon 2 of 14	ENST00000240139.10	NP_005596.2	P48454-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPP3CC	ENST00000240139.10 link	c.55C>G	p.Pro19Ala	missense_variant	Exon 2 of 14	1	NM_005605.5	ENSP00000240139.5		P48454-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000415

AC:

AN:

240764

Hom.:

AF XY:

0.00000764

AC XY:

AN XY:

130838

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.00000913

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000286

AC:

AN:

1400536

Hom.:

Cov.:

AF XY:

0.00000288

AC XY:

AN XY:

694678

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.00000372

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000113

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 10, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.55C>G (p.P19A) alteration is located in exon 2 (coding exon 2) of the PPP3CC gene. This alteration results from a C to G substitution at nucleotide position 55, causing the proline (P) at amino acid position 19 to be replaced by an alanine (A). 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

0.13

BayesDel_addAF

Uncertain

0.12

BayesDel_noAF

Uncertain

-0.060

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.32

.;T;.;.;T

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.45

FATHMM_MKL

Uncertain

0.96

LIST_S2

Pathogenic

0.98

D;D;D;D;D

M_CAP

Benign

0.042

MetaRNN

Uncertain

0.64

D;D;D;D;D

MetaSVM

Benign

-0.59

MutationAssessor

Uncertain

2.9

.;M;M;M;.

PrimateAI

Pathogenic

0.82

PROVEAN

Uncertain

-3.9

D;D;D;D;D

REVEL

Uncertain

0.34

Sift

Benign

0.049

D;T;T;T;D

Sift4G

Benign

0.074

T;T;T;T;T

Polyphen

0.011

B;B;B;.;.

Vest4

0.66

MVP

0.83

MPC

0.37

ClinPred

0.79

GERP RS

5.8

Varity_R

0.24

gMVP

0.55

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