Is PLEC p.Lys45= (c.135G>A) pathogenic?

PLEC p.Lys45= (c.135G>A) is classified Likely benign in PLEC (ClinVar, Single submitter, 1 submitter; last evaluated 2022-06-08). Rare (popmax 0.12%, eas); Associated with autosomal recessive limb-girdle muscular dystrophy type 2Q.

What condition is associated with PLEC p.Lys45= (c.135G>A)?

PLEC p.Lys45= (c.135G>A) is associated with autosomal recessive limb-girdle muscular dystrophy type 2Q, epidermolysis bullosa simplex 5A, Ogna type, epidermolysis bullosa simplex 5B, with muscular dystrophy (ClinVar).

How common is PLEC p.Lys45= (c.135G>A) in the general population?

PLEC p.Lys45= (c.135G>A) is rare (popmax 0.12%, eas) (gnomAD).

PLEC p.Lys45=

Q: How is Plectin-related limb-girdle muscular dystrophy R17 inherited?

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

c.135G>A · rs201923141 · VCV487249

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

rare (popmax 0.12%, eas)

Conditions

autosomal recessive limb-girdle muscular dystrophy type 2Q

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 3.9	phastCons 1
Overall
CADD	15.75	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.12% East Asian · 54/44,866 alleles

Filtering AF 0.0947% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0855%

Overall 0.00353% 57/1,613,880 alleles · rare exomes 56/1,461,628 · genomes 1/152,252 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.12%	831
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,606
Remaining individualsnot grpmax-eligible	0.0016%	62,502
European (non-Finnish)	8.47e-05%	1,179,967

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.Lys45=
Coding: c.135G>A
MANE Select: NM_201384
dbSNP: rs201923141
Type: single nucleotide variant
Location: chr8:143938670 (GRCh38)
Gene constraint: LOEUF 0.726 · pLI <0.01 (gnomAD)
Residue 45: the 'globular 1' region

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

Disease context

autosomal recessive limb-girdle muscular dystrophy type 2Q — 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 epidermolysis bullosa simplex with nail dystrophy

For Plectin-related limb-girdle muscular dystrophy R17 (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood

Similar variants

PLEC p.Gly45Ser Conflicting classifications of pathogenicity ★ same residue
PLEC p.Gly45= Likely benign ★ 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-lys45 (accessed [today's date]).

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