Is DYSF p.Pro741Ala (c.2221C>G) pathogenic?

DYSF p.Pro741Ala (c.2221C>G) is classified Uncertain significance in DYSF (ClinVar, No assertion criteria, 1 submitter; last evaluated 2025-02-26). AlphaMissense: likely benign (0.0775); Absent from gnomAD v4.1; Associated with autosomal recessive limb-girdle muscular dystrophy type 2B.

What condition is associated with DYSF p.Pro741Ala (c.2221C>G)?

DYSF p.Pro741Ala (c.2221C>G) is associated with autosomal recessive limb-girdle muscular dystrophy type 2B (ClinVar).

How common is DYSF p.Pro741Ala (c.2221C>G) in the general population?

DYSF p.Pro741Ala (c.2221C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about DYSF p.Pro741Ala (c.2221C>G)?

AlphaMissense predicts likely benign (score 0.0775) — an in-silico prediction, not a clinical call.

DYSF p.Pro741Ala

Q: How is Dysferlin-related limb-girdle muscular dystrophy R2 inherited?

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

c.2221C>G · VCV4067049

Uncertain significance No assertion criteria

Classification

Uncertain significance

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0775 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Conditions

autosomal recessive limb-girdle muscular dystrophy type 2B

Computational evidence

Protein change
AlphaMissense	0.0775	likely benign
REVEL	0.347	indeterminate
SaProt	LLR -7.19	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL is indeterminate.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.22 · evaluated, not missing
Constraint at this position
Conservation	phyloP 3.2	GERP 0.68, phastCons 1
Regional constraint	o/e 0.82	unconstrained · MANE · 18 kb · p 4.1e-05 · regional, not allelic
Overall
CADD	22.9	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM P723A vs ClinVar P741A) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: DYSF
Protein: p.Pro741Ala
Coding: c.2221C>G
MANE Select: NM_001130987
Type: single nucleotide variant
Location: chr2:71561756 (GRCh38)
Gene constraint: LOEUF 0.836 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 79.25 · 11 PDB
Residue 723 UniProt numbering: an α-helix

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

Disease context

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

For Dysferlin-related limb-girdle muscular dystrophy R2 (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult
Prevalence: 1-9 / 1 000 000 (United Kingdom)

Similar variants

DYSF p.Pro741= Likely benign ★ same residue
DYSF c.1033+1G>A Pathogenic ★★★ same condition
DYSF c.1149+1G>A Pathogenic ★★★ same condition
DYSF c.1149+1G>C Pathogenic ★★★ same condition
DYSF c.1149+4A>G Pathogenic ★★★ same condition
DYSF c.1276+5G>A Pathogenic ★★★ same condition
DYSF c.1276+5G>C Pathogenic ★★★ same condition
DYSF c.1481-1G>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/dysf-p-pro741ala (accessed [today's date]).

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