Is PLEC p.Phe311= (c.933C>T) pathogenic?

PLEC p.Phe311= (c.933C>T) is classified Conflicting classifications of pathogenicity in PLEC (ClinVar, Conflicting submitters, 4 submitters; last evaluated 2026-02-01). Very rare (popmax 0.00668%, eas); Associated with epidermolysis bullosa simplex with nail dystrophy.

What condition is associated with PLEC p.Phe311= (c.933C>T)?

PLEC p.Phe311= (c.933C>T) is associated with epidermolysis bullosa simplex with nail dystrophy, epidermolysis bullosa simplex 5A, Ogna type, epidermolysis bullosa simplex 5B, with muscular dystrophy (ClinVar).

How common is PLEC p.Phe311= (c.933C>T) in the general population?

PLEC p.Phe311= (c.933C>T) is very rare (popmax 0.00668%, eas) (gnomAD).

PLEC p.Phe311=

c.933C>T · rs369363676 · VCV193586

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00668%, eas)

Conditions

epidermolysis bullosa simplex with nail dystrophy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>T here scores Δ0.33 · evaluated, not missing
Constraint at this position
Conservation	phyloP -3.8
Overall
CADD	6.839	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00668% East Asian · 3/44,890 alleles

Filtering AF 0.00326% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00294%

Overall 0.00565% 91/1,611,498 alleles · very rare exomes 81/1,459,302 · genomes 10/152,196 · joint denominator

Ancestry group	Frequency	1 in
Finnishnot grpmax-eligible	0.0534%	1,872
East Asiangrpmax	0.00668%	14,963
Remaining individualsnot grpmax-eligible	0.0048%	20,813
European (non-Finnish)	0.00424%	23,597
African / African-American	0.00133%	74,926
South Asian	0.0011%	91,086

Finnish shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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.Phe311=
Coding: c.933C>T
MANE Select: NM_201384
dbSNP: rs369363676
Type: single nucleotide variant
Location: chr8:143934822 (GRCh38)
Gene constraint: LOEUF 0.726 · pLI <0.01 (gnomAD)
Residue 311: a turn; the calponin-homology (ch) 2 domain; the 'globular 1' region; the 'actin-binding' region

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

Disease context

epidermolysis bullosa simplex with nail dystrophy — 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 epidermolysis bullosa simplex 5C, with pyloric atresia autosomal recessive limb-girdle muscular dystrophy type 2Q

Similar variants

PLEC p.Phe311Leu 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
PLEC p.Arg559Ter 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-phe311 (accessed [today's date]).

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