chr12-32790861-C-A

Position:

• chr12-32790861-C-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001005242.3(PKP2):​c.*1563G>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0518 in 152,190 control chromosomes in the GnomAD database, including 254 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.052 (254 hom., cov: 33)
  • Failed GnomAD Quality Control
• Consequence: PKP2 NM_001005242.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -1.17

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.75).
• BP6: Variant 12-32790861-C-A is Benign according to our data. Variant chr12-32790861-C-A is described in ClinVar as [Benign]. Clinvar id is 308468.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.0776 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PKP2	NM_001005242.3	c.*1563G>T		3_prime_UTR_variant	13/13	ENST00000340811.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PKP2	ENST00000340811.9	c.*1563G>T		3_prime_UTR_variant	13/13	1	NM_001005242.3	P1

Frequencies

GnomAD3 genomes AF: 0.0519 AC: 7893 AN: 152072 Hom.: 253 Cov.: 33

Gnomad AFR AF: 0.0211

Gnomad AMI AF: 0.0768

Gnomad AMR AF: 0.0465

Gnomad ASJ AF: 0.0251

Gnomad EAS AF: 0.0137

Gnomad SAS AF: 0.0591

Gnomad FIN AF: 0.0266

Gnomad MID AF: 0.0348

Gnomad NFE AF: 0.0794

Gnomad OTH AF: 0.0499

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

GnomAD4 genome AF: 0.0518 AC: 7889 AN: 152190 Hom.: 254 Cov.: 33 AF XY: 0.0496 AC XY: 3687 AN XY: 74408

Gnomad4 AFR AF: 0.0211

Gnomad4 AMR AF: 0.0464

Gnomad4 ASJ AF: 0.0251

Gnomad4 EAS AF: 0.0137

Gnomad4 SAS AF: 0.0585

Gnomad4 FIN AF: 0.0266

Gnomad4 NFE AF: 0.0794

Gnomad4 OTH AF: 0.0493

Alfa AF: 0.0616 Hom.: 57

Bravo AF: 0.0515

Asia WGS AF: 0.0320 AC: 111 AN: 3466

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Arrhythmogenic right ventricular dysplasia 9 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.75
CADD	Benign	2.2
DANN	Benign	0.76

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

Other links and lift over

dbSNP: rs1046154; hg19: chr12-32943795;