Is FLNC p.Arg1376= (c.4128G>A) pathogenic?

FLNC p.Arg1376= (c.4128G>A) is classified Uncertain significance in FLNC (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-11-04). Very rare (popmax 0.0011%, sas); Associated with hypertrophic cardiomyopathy 26.

What condition is associated with FLNC p.Arg1376= (c.4128G>A)?

FLNC p.Arg1376= (c.4128G>A) is associated with hypertrophic cardiomyopathy 26, hypertrophic cardiomyopathy, myofibrillar myopathy 5 (ClinVar).

How common is FLNC p.Arg1376= (c.4128G>A) in the general population?

FLNC p.Arg1376= (c.4128G>A) is very rare (popmax 0.0011%, sas) (gnomAD).

FLNC p.Arg1376=

c.4128G>A · VCV3761217

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Conditions

hypertrophic cardiomyopathy 26

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
Splicing
SpliceAI	Δ0.37	acceptor gain · deltas
Constraint at this position
Conservation	phyloP 6.7	phastCons 1
Overall
CADD	17.62	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% South Asian · 1/91,084 alleles

Overall 6.2e-05% 1/1,613,816 alleles · very rare exomes 1/1,461,454 · genomes 0/152,362 · 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.Arg1376=
Coding: c.4128G>A
MANE Select: NM_001458
Type: single nucleotide variant
Location: chr7:128846745 (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

hypertrophic cardiomyopathy 26 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hypertrophic cardiomyopathy myofibrillar myopathy 5 distal myopathy with posterior leg and anterior hand involvement

Similar variants

FLNC p.Arg1376Lys 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
FLNC c.2007+1G>A Likely pathogenic ★★ same condition
FLNC c.2550+1G>C Likely pathogenic ★★ same condition
FLNC c.2550+2T>C Pathogenic/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-arg1376 (accessed [today's date]).

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