Is FLNC p.Arg1352= (c.4056C>T) pathogenic?

FLNC p.Arg1352= (c.4056C>T) is classified Benign in FLNC (ClinVar, Multiple submitters, 13 submitters; last evaluated 2026-02-04). Common (popmax 29.5%, eas) — too common for a highly-penetrant pathogenic allele; Associated with distal myopathy with posterior leg and anterior hand involvement.

What condition is associated with FLNC p.Arg1352= (c.4056C>T)?

FLNC p.Arg1352= (c.4056C>T) is associated with distal myopathy with posterior leg and anterior hand involvement, myofibrillar myopathy 5, hypertrophic cardiomyopathy 26 (ClinVar).

FLNC p.Arg1352=

Q: How common is FLNC p.Arg1352= (c.4056C>T) in the general population?

FLNC p.Arg1352= (c.4056C>T) is common (popmax 29.5%, eas) — too common for a highly-penetrant pathogenic allele (gnomAD).

Q: How is FLNC-related handgrip and calf weakness-distal myopathy inherited?

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

c.4056C>T · rs75770585 · VCV129089

Benign Multiple submitters

Classification

Benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 13 submitters

gnomAD v4.1

Common

common (popmax 29.5%, eas) — too common for a highly-penetrant pathogenic allele

Conditions

distal myopathy with posterior leg and anterior hand involvement

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 -20
Overall
CADD	0.032	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 29.5% East Asian · 13,251/44,864 alleles

Filtering AF 29.1% ClinGen BA1/BS1 input FAF95, joint · FAF99 28.9%

Overall 5.65% 91,056/1,611,006 alleles · common exomes 77,424/1,458,816 · genomes 13,632/152,190 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	29.5%	3
African / African-American	17.4%	6
Admixed American	12.9%	8
South Asian	8.49%	12
Remaining individualsnot grpmax-eligible	6.13%	16
Middle Eastern	4.12%	24
European (non-Finnish)	3.65%	27
Finnishnot grpmax-eligible	2.62%	38
Ashkenazi Jewishnot grpmax-eligible	1.79%	56
Amishnot grpmax-eligible	0.329%	304

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.Arg1352=
Coding: c.4056C>T
MANE Select: NM_001458
dbSNP: rs75770585
Type: single nucleotide variant
Location: chr7:128846392 (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

distal myopathy with posterior leg and anterior hand involvement — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: myofibrillar myopathy 5 hypertrophic cardiomyopathy 26

For FLNC-related handgrip and calf weakness-distal myopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: Adolescent, Adult

Similar variants

FLNC p.Arg1352Leu Uncertain significance ★★ ⚠ same residue
FLNC p.Arg1352Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
FLNC p.Arg1352fs Pathogenic/Likely pathogenic ★★ same residue
FLNC p.Arg1352His 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-arg1352 (accessed [today's date]).

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