Is FKRP p.Arg216= (c.648G>A) pathogenic?

FKRP p.Arg216= (c.648G>A) is classified Likely benign in FKRP (ClinVar, Single submitter, 1 submitter; last evaluated 2020-11-02). Absent from gnomAD v4.1; Associated with muscular dystrophy-dystroglycanopathy, type A.

What condition is associated with FKRP p.Arg216= (c.648G>A)?

FKRP p.Arg216= (c.648G>A) is associated with muscular dystrophy-dystroglycanopathy, type A (ClinVar).

How common is FKRP p.Arg216= (c.648G>A) in the general population?

FKRP p.Arg216= (c.648G>A) is absent from gnomAD v4.1 (gnomAD).

How is Walker-Warburg syndrome inherited?

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

FKRP p.Arg216=

c.648G>A · rs781297006 · VCV1596300

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,535,948)

Conditions

muscular dystrophy-dystroglycanopathy, type A

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 4.7	GERP -0.24, phastCons 1
Overall
CADD	6.526	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,535,948). 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: FKRP
Protein: p.Arg216=
Coding: c.648G>A
MANE Select: NM_024301
dbSNP: rs781297006
Type: single nucleotide variant
Location: chr19:46756098 (GRCh38)
Gene constraint: LOEUF 1.543 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 94.08 · 8 PDB

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

Disease context

muscular dystrophy-dystroglycanopathy, type A — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Walker-Warburg syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Antenatal, Infancy, Neonatal
Prevalence: <1 / 1 000 000 (United Kingdom)

Similar variants

FKRP p.Arg216Gln Uncertain significance ★★ ⚠ same residue
FKRP p.Arg216Trp Conflicting classifications of pathogenicity ★ ⚠ same residue
FKRP p.Ala157Pro Pathogenic/Likely pathogenic ★★ same condition
FKRP p.Ala321Glu Pathogenic/Likely pathogenic ★★ ⚠ same condition
FKRP p.Ala455Asp Pathogenic ★★ same condition
FKRP p.Arg176Ter Pathogenic/Likely pathogenic ★★ same condition
FKRP p.Arg275Cys Pathogenic/Likely pathogenic ★★ same condition
FKRP p.Arg54Gly Likely 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/fkrp-p-arg216 (accessed [today's date]).

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