Is PLEC p.Arg434Pro (c.1301G>C) pathogenic?

PLEC p.Arg434Pro (c.1301G>C) is classified Uncertain significance in PLEC (ClinVar, Single submitter, 1 submitter; last evaluated 2022-08-16). AlphaMissense: ambiguous (0.3884); Ultra-rare (popmax 0.0245%, eas); Associated with epidermolysis bullosa simplex 5C, with pyloric atresia.

What condition is associated with PLEC p.Arg434Pro (c.1301G>C)?

PLEC p.Arg434Pro (c.1301G>C) is associated with epidermolysis bullosa simplex 5C, with pyloric atresia, epidermolysis bullosa simplex 5A, Ogna type, epidermolysis bullosa simplex 5B, with muscular dystrophy (ClinVar).

How common is PLEC p.Arg434Pro (c.1301G>C) in the general population?

PLEC p.Arg434Pro (c.1301G>C) is ultra-rare (popmax 0.0245%, eas) (gnomAD).

What do computational predictors say about PLEC p.Arg434Pro (c.1301G>C)?

AlphaMissense predicts ambiguous (score 0.3884) — an in-silico prediction, not a clinical call.

PLEC p.Arg434Pro

Q: How is Epidermolysis bullosa simplex with pyloric atresia inherited?

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

c.1301G>C · rs201336009 · VCV639972

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3884 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0245%, eas)

Conditions

epidermolysis bullosa simplex 5C, with pyloric atresia

Computational evidence

Protein change
AlphaMissense	0.3884	ambiguous
REVEL	0.381	indeterminate
SaProt	—	not scored · why
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.7	phastCons 1
Regional constraint	o/e 1.08	unconstrained · MANE · 18 kb · p 4.9e-10 · regional, not allelic
Overall
CADD	22.5	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM R571P vs ClinVar R434P) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0245% East Asian · 11/44,886 alleles

Filtering AF 0.0137% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0106%

Overall 0.000682% 11/1,612,752 alleles · ultra-rare exomes 10/1,460,456 · genomes 1/152,296 · joint denominator

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: PLEC
Protein: p.Arg434Pro
Coding: c.1301G>C
MANE Select: NM_201384
dbSNP: rs201336009
Type: single nucleotide variant
Location: chr8:143933314 (GRCh38)
Gene constraint: LOEUF 0.726 · pLI <0.01 (gnomAD)

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

Disease context

epidermolysis bullosa simplex 5C, with pyloric atresia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: epidermolysis bullosa simplex 5A, Ogna type epidermolysis bullosa simplex 5B, with muscular dystrophy autosomal recessive limb-girdle muscular dystrophy type 2Q epidermolysis bullosa simplex with nail dystrophy

For Epidermolysis bullosa simplex with pyloric atresia (Orphanet):

Inheritance: Autosomal recessive
Onset: Neonatal

Similar variants

PLEC p.Arg434Gln Uncertain significance ★★ ⚠ same residue
PLEC p.Arg434Gly Uncertain significance ★ same residue
PLEC p.Arg1490Ter Pathogenic/Likely pathogenic ★★ same condition
PLEC p.Arg1973Trp Pathogenic ★★ ⚠ same condition
PLEC p.Arg2027Ter Pathogenic ★★ same condition
PLEC p.Arg2292Ter Pathogenic ★★ same condition
PLEC p.Arg2324Ter Pathogenic ★★ same condition
PLEC p.Arg2394Ter 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/plec-p-arg434pro (accessed [today's date]).

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