chr12-32824169-G-GA

Position:

chr12-32824169-G-GA

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP6_Very_StrongBS1BS2

The NM_001005242.3(PKP2):c.1557-8_1557-7insT variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00372 in 1,598,084 control chromosomes in the GnomAD database, including 21 homozygotes. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0040 ( 1 hom., cov: 32)

Exomes 𝑓: 0.0037 ( 20 hom. )

Consequence

PKP2
NM_001005242.3 splice_region, splice_polypyrimidine_tract, intron

Scores

Not classified

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: 0.802

Variant links:

Genes affected

PKP2 (HGNC:9024): (plakophilin 2) 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 gene may regulate the signaling activity of beta-catenin and is required to maintain transcription of genes that control intracellular calcium cycling including ryanodine receptor 2, ankyrin-B, triadin, and calcium channel, voltage-dependent, L type, alpha 1C. Mutations in this gene are associated with different inherited cardiac conditions including Arrythmogenic Cardiomyopathy, Brugada Syndrome, and Idiopathic Ventricular Fibrillation. A processed pseudogene with high similarity to this gene has been mapped to chromosome 12p13. [provided by RefSeq, May 2022]

PKP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP6

Variant 12-32824169-G-GA is Benign according to our data. Variant chr12-32824169-G-GA is described in ClinVar as [Likely_benign]. Clinvar id is 45040.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00401 (609/151944) while in subpopulation NFE AF= 0.00459 (312/67942). AF 95% confidence interval is 0.00417. There are 1 homozygotes in gnomad4. There are 314 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 609 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PKP2	NM_001005242.3 linkuse as main transcript	c.1557-8_1557-7insT		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000340811.9	NP_001005242.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PKP2	ENST00000340811.9 linkuse as main transcript	c.1557-8_1557-7insT		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		1	NM_001005242.3	ENSP00000342800	P1	Q99959-2

Frequencies

GnomAD3 genomes

AF:

0.00401

AC:

609

AN:

151826

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000726

Gnomad AMI

AF:

0.0341

Gnomad AMR

AF:

0.00354

Gnomad ASJ

AF:

0.0164

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0112

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00459

Gnomad OTH

AF:

0.00335

GnomAD3 exomes

AF:

0.00405

AC:

1012

AN:

249592

Hom.:

AF XY:

0.00406

AC XY:

548

AN XY:

135060

show subpopulations

Gnomad AFR exome

AF:

0.000863

Gnomad AMR exome

AF:

0.00231

Gnomad ASJ exome

AF:

0.0174

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000261

Gnomad FIN exome

AF:

0.0110

Gnomad NFE exome

AF:

0.00421

Gnomad OTH exome

AF:

0.00573

GnomAD4 exome

AF:

0.00369

AC:

5337

AN:

1446140

Hom.:

Cov.:

AF XY:

0.00358

AC XY:

2577

AN XY:

720550

show subpopulations

Gnomad4 AFR exome

AF:

0.000482

Gnomad4 AMR exome

AF:

0.00304

Gnomad4 ASJ exome

AF:

0.0166

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000337

Gnomad4 FIN exome

AF:

0.0122

Gnomad4 NFE exome

AF:

0.00347

Gnomad4 OTH exome

AF:

0.00441

GnomAD4 genome

AF:

0.00401

AC:

609

AN:

151944

Hom.:

Cov.:

AF XY:

0.00423

AC XY:

314

AN XY:

74256

show subpopulations

Gnomad4 AFR

AF:

0.000724

Gnomad4 AMR

AF:

0.00354

Gnomad4 ASJ

AF:

0.0164

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0112

Gnomad4 NFE

AF:

0.00459

Gnomad4 OTH

AF:

0.00332

Alfa

AF:

0.00522

Hom.:

Bravo

AF:

0.00346

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Sep 29, 2015	c.1689-8dupT in intron 7 of PKP2: This variant is not expected to have clinical significance because it has been identified in 1% (74/6604) of Finnish chromosom es by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org/; d bSNP rs200009796). -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Oct 13, 2014	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

Arrhythmogenic right ventricular dysplasia 9

Benign:3

Benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	Oct 09, 2014	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -

not provided

Benign:3

Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 12, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2024	PKP2: BP4, BS2 -

Cardiomyopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Apr 08, 2018

- -

PKP2-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 29, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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