Is FLNC p.Ser1391= (c.4173G>A) pathogenic?

FLNC p.Ser1391= (c.4173G>A) is classified Likely benign in FLNC (ClinVar, Multiple submitters, 5 submitters; last evaluated 2026-01-19). Ultra-rare (popmax 0.0493%, mid); Associated with Cardiovascular phenotype.

What condition is associated with FLNC p.Ser1391= (c.4173G>A)?

FLNC p.Ser1391= (c.4173G>A) is associated with Cardiovascular phenotype, myofibrillar myopathy 5, distal myopathy with posterior leg and anterior hand involvement (ClinVar).

How common is FLNC p.Ser1391= (c.4173G>A) in the general population?

FLNC p.Ser1391= (c.4173G>A) is ultra-rare (popmax 0.0493%, mid) (gnomAD).

FLNC p.Ser1391=

c.4173G>A · rs201481324 · VCV1112458

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0493%, mid)

Conditions

Cardiovascular phenotype

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 -13
Overall
CADD	0.777	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0493% Middle Eastern · 3/6,084 alleles

Filtering AF 0.0134% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00715%

Overall 0.00341% 55/1,614,062 alleles · ultra-rare exomes 48/1,461,834 · genomes 7/152,228 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0493%	2,028
African / African-American	0.00667%	14,989
South Asian	0.00659%	15,182
Remaining individualsnot grpmax-eligible	0.0064%	15,622
Admixed American	0.00333%	29,999
European (non-Finnish)	0.00297%	33,715

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.Ser1391=
Coding: c.4173G>A
MANE Select: NM_001458
dbSNP: rs201481324
Type: single nucleotide variant
Location: chr7:128846790 (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

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: myofibrillar myopathy 5 distal myopathy with posterior leg and anterior hand involvement hypertrophic cardiomyopathy 26

Similar variants

FLNC p.Ser1391Leu Conflicting classifications of pathogenicity ★ ⚠ same residue
FLNC p.Ser1391Ter Likely pathogenic same residue
FLNC p.Ser1391_Tyr1409del 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

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-ser1391 (accessed [today's date]).

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