Is FLNC p.Ser1143= (c.3429G>A) pathogenic?

FLNC p.Ser1143= (c.3429G>A) is classified Likely benign in FLNC (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-05-05). Very rare (popmax 0.00446%, eas); Associated with Cardiovascular phenotype.

What condition is associated with FLNC p.Ser1143= (c.3429G>A)?

FLNC p.Ser1143= (c.3429G>A) is associated with Cardiovascular phenotype, myofibrillar myopathy 5, distal myopathy with posterior leg and anterior hand involvement (ClinVar).

How common is FLNC p.Ser1143= (c.3429G>A) in the general population?

FLNC p.Ser1143= (c.3429G>A) is very rare (popmax 0.00446%, eas) (gnomAD).

FLNC p.Ser1143=

c.3429G>A · rs780592878 · VCV1586986

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00446%, eas)

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -14
Overall
CADD	0.205	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00446% East Asian · 2/44,884 alleles

Filtering AF 0.000875% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000474%

Overall 0.00118% 19/1,613,784 alleles · very rare exomes 18/1,461,590 · genomes 1/152,194 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00446%	22,442
South Asian	0.00329%	30,361
Admixed American	0.00167%	60,008
European (non-Finnish)	0.0011%	90,774

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.Ser1143=
Coding: c.3429G>A
MANE Select: NM_001458
dbSNP: rs780592878
Type: single nucleotide variant
Location: chr7:128844894 (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.Ser1143Leu 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-ser1143 (accessed [today's date]).

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