Is FLNC p.Arg1526= (c.4578C>A) pathogenic?

FLNC p.Arg1526= (c.4578C>A) is classified Likely benign in FLNC (ClinVar, Single submitter, 1 submitter; last evaluated 2022-05-10). Very rare (popmax 0.000511%, nfe); Associated with myofibrillar myopathy 5.

What condition is associated with FLNC p.Arg1526= (c.4578C>A)?

FLNC p.Arg1526= (c.4578C>A) is associated with myofibrillar myopathy 5, distal myopathy with posterior leg and anterior hand involvement, hypertrophic cardiomyopathy 26 (ClinVar).

How common is FLNC p.Arg1526= (c.4578C>A) in the general population?

FLNC p.Arg1526= (c.4578C>A) is very rare (popmax 0.000511%, nfe) (gnomAD).

How is Muscle filaminopathy inherited?

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

FLNC p.Arg1526=

c.4578C>A · rs778583356 · VCV2185600

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.000511%, nfe)

Conditions

myofibrillar myopathy 5

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 · C>T here scores Δ0.55 · evaluated, not missing
Constraint at this position
Conservation	phyloP 0.65	phastCons 1
Overall
CADD	12.55	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000511% European (non-Finnish) · 6/1,174,350 alleles

Filtering AF 0.000184% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000121%

Overall 0.000374% 6/1,602,498 alleles · very rare exomes 6/1,450,188 · genomes 0/152,310 · joint denominator

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: FLNC
Protein: p.Arg1526=
Coding: c.4578C>A
MANE Select: NM_001458
dbSNP: rs778583356
Type: single nucleotide variant
Location: chr7:128848066 (GRCh38)
Gene constraint: LOEUF 0.424 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)

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

Disease context

myofibrillar myopathy 5 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: distal myopathy with posterior leg and anterior hand involvement hypertrophic cardiomyopathy 26

For Muscle filaminopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: Adult

Similar variants

FLNC p.Arg1526His Uncertain significance ★★ ⚠ same residue
FLNC p.Arg1526Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
FLNC p.Arg1526Gly Uncertain significance ★ ⚠ same residue
FLNC p.Arg1526Pro Uncertain significance ★ same residue
FLNC c.1047+1G>T Likely pathogenic ★★ same condition
FLNC c.1048-1G>A Likely pathogenic ★★ same condition
FLNC c.1210+1G>A Likely pathogenic ★★ same condition
FLNC c.1549+2T>G 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/flnc-p-arg1526 (accessed [today's date]).

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