Is PLEC p.Ala1803= (c.5409C>T) pathogenic?

PLEC p.Ala1803= (c.5409C>T) is classified Likely benign in PLEC (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-12-17). Rare (popmax 0.27%, eas); Associated with epidermolysis bullosa simplex 5B, with muscular dystrophy.

What condition is associated with PLEC p.Ala1803= (c.5409C>T)?

PLEC p.Ala1803= (c.5409C>T) is associated with epidermolysis bullosa simplex 5B, with muscular dystrophy, epidermolysis bullosa simplex 5A, Ogna type, epidermolysis bullosa simplex 5C, with pyloric atresia (ClinVar).

How common is PLEC p.Ala1803= (c.5409C>T) in the general population?

PLEC p.Ala1803= (c.5409C>T) is rare (popmax 0.27%, eas) (gnomAD).

PLEC p.Ala1803=

Q: How is Epidermolysis bullosa simplex with muscular dystrophy inherited?

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

c.5409C>T · rs781879421 · VCV1135990

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

rare (popmax 0.27%, eas)

Conditions

epidermolysis bullosa simplex 5B, with muscular dystrophy

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 -16
Overall
CADD	0.09	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.27% East Asian · 109/40,332 alleles

Filtering AF 0.229% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.214%

Overall 0.00996% 153/1,535,524 alleles · rare exomes 141/1,384,542 · genomes 12/150,982 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.27%	370
African / African-American	0.014%	7,165
Remaining individualsnot grpmax-eligible	0.0134%	7,468
South Asian	0.00708%	14,124
Admixed American	0.00382%	26,153
European (non-Finnish)	0.00157%	63,747

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.Ala1803=
Coding: c.5409C>T
MANE Select: NM_201384
dbSNP: rs781879421
Type: single nucleotide variant
Location: chr8:143924520 (GRCh38)
Gene constraint: LOEUF 0.726 · pLI <0.01 (gnomAD)
Residue 1803: the 'required for interaction with intermediate filament proteins' region; the 'central fibrous rod domain' region; the 'disordered' region

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

Disease context

epidermolysis bullosa simplex 5B, with muscular dystrophy — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

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

For Epidermolysis bullosa simplex with muscular dystrophy (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

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PLEC p.Arg2027Ter Pathogenic ★★ same condition
PLEC p.Arg2292Ter Pathogenic ★★ same condition
PLEC p.Arg2324Ter Pathogenic ★★ same condition
PLEC p.Arg2394Ter Pathogenic ★★ same condition
PLEC p.Arg559Ter Pathogenic ★★ same condition
PLEC p.Gln1591Ter 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/plec-p-ala1803 (accessed [today's date]).

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