Is PKP2 p.Pro276= (c.828C>T) pathogenic?

PKP2 p.Pro276= (c.828C>T) is classified Likely benign in PKP2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-02-10). Very rare (popmax 0.00223%, eas); Associated with arrhythmogenic right ventricular dysplasia 9.

What condition is associated with PKP2 p.Pro276= (c.828C>T)?

PKP2 p.Pro276= (c.828C>T) is associated with arrhythmogenic right ventricular dysplasia 9 (ClinVar).

How common is PKP2 p.Pro276= (c.828C>T) in the general population?

PKP2 p.Pro276= (c.828C>T) is very rare (popmax 0.00223%, eas) (gnomAD).

PKP2 p.Pro276=

Q: How is Inherited isolated arrhythmogenic cardiomyopathy inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

c.828C>T · rs2137947497 · VCV1119842

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00223%, eas)

Conditions

arrhythmogenic right ventricular dysplasia 9

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.63	phastCons 0.52
Overall
CADD	6.206	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00223% East Asian · 1/44,880 alleles

Overall 6.84e-05% 1/1,461,592 alleles · very rare

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: PKP2
Protein: p.Pro276=
Coding: c.828C>T
MANE Select: NM_001005242
dbSNP: rs2137947497
Type: single nucleotide variant
Location: chr12:32878052 (GRCh38)
Gene constraint: LOEUF 1.105 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 64.32 · 1 PDB
Residue 276: the 'required for interaction with influenza a virus rna polymerase subunit pb1' region; a UniProt-annotated variant site (in arvd9; uncertain significance); a UniProt-annotated variant site (in); the 'required for binding to single-stranded dna' region

Full PKP2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

arrhythmogenic right ventricular dysplasia 9 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Inherited isolated arrhythmogenic cardiomyopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: No data available

Similar variants

PKP2 p.Pro276Leu Uncertain significance ★ ⚠ same residue
PKP2 p.Pro276Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
PKP2 c.1034+1G>C Likely pathogenic ★★ same condition
PKP2 c.1034+1G>T Likely pathogenic ★★ same condition
PKP2 c.1035-2A>G Likely pathogenic ★★ same condition
PKP2 c.1170+1G>A Pathogenic/Likely pathogenic ★★ same condition
PKP2 c.1170+1G>C Pathogenic ★★ same condition
PKP2 c.1170+2T>A Pathogenic/Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/pkp2-p-pro276 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown