Is PLEC p.Ala497= (c.1491G>A) pathogenic?

PLEC p.Ala497= (c.1491G>A) is classified Conflicting classifications of pathogenicity in PLEC (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2026-01-27). Ultra-rare (popmax 0.018%, mid); Associated with epidermolysis bullosa simplex 5B, with muscular dystrophy.

What condition is associated with PLEC p.Ala497= (c.1491G>A)?

PLEC p.Ala497= (c.1491G>A) 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.Ala497= (c.1491G>A) in the general population?

PLEC p.Ala497= (c.1491G>A) is ultra-rare (popmax 0.018%, mid) (gnomAD).

PLEC p.Ala497=

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.1491G>A · rs782376231 · VCV596007

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.018%, mid)

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 -8.5
Overall
CADD	0.382	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.018% Middle Eastern · 1/5,566 alleles

Filtering AF 0.00107% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000496%

Overall 0.00119% 19/1,595,874 alleles · ultra-rare exomes 19/1,443,558 · genomes 0/152,316 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.018%	5,566
African / African-American	0.00402%	24,871
Remaining individualsnot grpmax-eligible	0.00324%	30,856
East Asian	0.00229%	43,756
Admixed American	0.00174%	57,562
Finnishnot grpmax-eligible	0.00165%	60,692
European (non-Finnish)	0.000853%	117,277

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.Ala497=
Coding: c.1491G>A
MANE Select: NM_201384
dbSNP: rs782376231
Type: single nucleotide variant
Location: chr8:143933039 (GRCh38)
Gene constraint: LOEUF 0.726 · pLI <0.01 (gnomAD)
Residue 497: the 'globular 1' 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

PLEC p.Ala497Val Uncertain significance ★★ ⚠ same residue
PLEC p.Ala497Pro 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-ala497 (accessed [today's date]).

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