Is CAPN3 p.Trp360Cys (c.1080G>C) pathogenic?

CAPN3 p.Trp360Cys (c.1080G>C) is classified Pathogenic in CAPN3 (ClinVar, No assertion criteria, 1 submitter; last evaluated 1998-11-01). AlphaMissense: likely pathogenic (0.9947); Absent from gnomAD v4.1; Associated with autosomal recessive limb-girdle muscular dystrophy type 2A.

What condition is associated with CAPN3 p.Trp360Cys (c.1080G>C)?

CAPN3 p.Trp360Cys (c.1080G>C) is associated with autosomal recessive limb-girdle muscular dystrophy type 2A (ClinVar).

How common is CAPN3 p.Trp360Cys (c.1080G>C) in the general population?

CAPN3 p.Trp360Cys (c.1080G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CAPN3 p.Trp360Cys (c.1080G>C)?

AlphaMissense predicts likely pathogenic (score 0.9947) — an in-silico prediction, not a clinical call.

CAPN3 p.Trp360Cys

Q: How is Calpain-3-related limb-girdle muscular dystrophy R1 inherited?

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

c.1080G>C · rs267606703 · VCV17619

Pathogenic No assertion criteria

Classification

Pathogenic

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9947 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,563,540)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

autosomal recessive limb-girdle muscular dystrophy type 2A

Computational evidence

Protein change
AlphaMissense	0.9947	likely pathogenic ✓ concordant with ClinVar · top 5% in CAPN3
REVEL	0.929	moderately pathogenic-leaning
SaProt	LLR -14.73	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2.8, phastCons 1
Regional constraint	o/e 0.96	unconstrained · MANE · 52 kb · p 0.21 · regional, not allelic
Overall
CADD	34.0	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,563,540). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: CAPN3
Protein: p.Trp360Cys
Coding: c.1080G>C
MANE Select: NM_000070
dbSNP: rs267606703
Type: single nucleotide variant
Location: chr15:42394306 (GRCh38)
Gene constraint: LOEUF 0.896 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 79.18 · 5 PDB
Residue 360: the calpain catalytic domain; a UniProt-annotated variant site (in lgmdr1)

Full CAPN3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

autosomal recessive limb-girdle muscular dystrophy type 2A — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Calpain-3-related limb-girdle muscular dystrophy R1 (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Childhood
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

CAPN3 p.Trp360Ter Pathogenic ★★ same residue
CAPN3 p.Trp360Leu Uncertain significance ★ same residue
CAPN3 c.1115+5G>C Pathogenic ★★★ same condition
CAPN3 c.1194-2A>G Pathogenic ★★★ same condition
CAPN3 c.1194-9A>G Pathogenic ★★★ same condition
CAPN3 c.1746-20C>G Pathogenic ★★★ same condition
CAPN3 c.1993-1G>A Pathogenic ★★★ same condition
CAPN3 c.499-1G>A 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/capn3-p-trp360cys (accessed [today's date]).

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