Genetic Variant PKP3:p.Ser99Thr (chr11-396671-G-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_007183.4(PKP3):c.296G>C(p.Ser99Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,458,812 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

PKP3
NM_007183.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.70

Variant links:

Genes affected

PKP3 (HGNC:9025): (plakophilin 3) This gene encodes a member of the arm-repeat (armadillo) and plakophilin gene families. Plakophilin proteins contain numerous armadillo repeats, localize to cell desmosomes and nuclei, and participate in linking cadherins to intermediate filaments in the cytoskeleton. This protein may act in cellular desmosome-dependent adhesion and signaling pathways. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2014]

PKP3 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.08219814).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PKP3	NM_007183.4 link	c.296G>C	p.Ser99Thr	missense_variant	Exon 2 of 13	ENST00000331563.7	NP_009114.1	Q9Y446-1
PKP3	NM_001303029.2 link	c.341G>C	p.Ser114Thr	missense_variant	Exon 3 of 14		NP_001289958.1	Q9Y446-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PKP3	ENST00000331563.7 link	c.296G>C	p.Ser99Thr	missense_variant	Exon 2 of 13	1	NM_007183.4	ENSP00000331678.2		Q9Y446-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000404

AC:

AN:

247408

Hom.:

AF XY:

0.00000744

AC XY:

AN XY:

134350

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:

0.00000901

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1458812

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725598

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:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000827

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 25, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.296G>C (p.S99T) alteration is located in exon 2 (coding exon 2) of the PKP3 gene. This alteration results from a G to C substitution at nucleotide position 296, causing the serine (S) at amino acid position 99 to be replaced by a threonine (T). 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

0.066

BayesDel_addAF

Benign

-0.042

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.049

.;T;T

Eigen

Benign

-0.70

Eigen_PC

Benign

-0.64

FATHMM_MKL

Benign

0.16

LIST_S2

Benign

0.67

T;T;T

M_CAP

Benign

0.058

MetaRNN

Benign

0.082

T;T;T

MetaSVM

Benign

-0.84

MutationAssessor

Benign

1.2

.;L;.

PrimateAI

Benign

0.43

PROVEAN

Benign

-0.22

.;N;N

REVEL

Benign

0.13

Sift

Benign

0.67

.;T;T

Sift4G

Benign

0.30

T;T;T

Polyphen

0.0040

.;B;.

Vest4

0.22

MutPred

0.25

.;Gain of relative solvent accessibility (P = 0.0082);.;

MVP

0.58

MPC

0.064

ClinPred

0.30

GERP RS

3.7

Varity_R

0.094

gMVP

0.39

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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