Is FLNA p.Ile602= (c.1806C>T) pathogenic?

FLNA p.Ile602= (c.1806C>T) is classified Benign/Likely benign in FLNA (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-01-12). Ultra-rare (popmax 0.0229%, mid); Associated with familial thoracic aortic aneurysm and aortic dissection.

What condition is associated with FLNA p.Ile602= (c.1806C>T)?

FLNA p.Ile602= (c.1806C>T) is associated with familial thoracic aortic aneurysm and aortic dissection, heterotopia, periventricular, X-linked dominant, otopalatodigital syndrome type 2 (ClinVar).

How common is FLNA p.Ile602= (c.1806C>T) in the general population?

FLNA p.Ile602= (c.1806C>T) is ultra-rare (popmax 0.0229%, mid) (gnomAD).

FLNA p.Ile602=

Q: How is Familial thoracic aortic aneurysm and aortic dissection inherited?

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

c.1806C>T · rs782543203 · VCV700052

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0229%, mid)

Conditions

familial thoracic aortic aneurysm and aortic dissection

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 -3.9	GERP -3.5
Overall
CADD	0.767	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0229% Middle Eastern · 1/4,375 alleles

Filtering AF 0.00567% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00406%

Overall 0.00256% 31/1,209,742 alleles · ultra-rare exomes 26/1,097,742 · genomes 5/112,000 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0229%	4,375
African / African-American	0.0122%	8,169
Admixed American	0.00436%	22,935
Remaining individualsnot grpmax-eligible	0.0042%	23,803
European (non-Finnish)	0.00212%	47,113

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: FLNA
Protein: p.Ile602=
Coding: c.1806C>T
MANE Select: NM_001110556
dbSNP: rs782543203
Type: single nucleotide variant
Location: chrX:154364843 (GRCh38)
Structure: AlphaFold pLDDT 77.37 · 26 PDB
Residue 602: a β-strand

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

Disease context

familial thoracic aortic aneurysm and aortic dissection — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: heterotopia, periventricular, X-linked dominant otopalatodigital syndrome type 2 Melnick-Needles syndrome frontometaphyseal dysplasia

For Familial thoracic aortic aneurysm and aortic dissection (Orphanet):

Inheritance: Autosomal dominant
Onset: Adolescent, Adult, Childhood

Similar variants

FLNA p.Ile602Val Uncertain significance ★★ ⚠ same residue
FLNA c.1066-1G>A Pathogenic/Likely pathogenic ★★ same condition
FLNA c.2022+1G>A Pathogenic ★★ same condition
FLNA c.4598+1G>A Pathogenic/Likely pathogenic ★★ same condition
FLNA c.5417-2A>G Likely pathogenic ★★ same condition
FLNA c.868+1G>A Likely pathogenic ★★ same condition
FLNA c.987+1G>A Likely pathogenic ★★ same condition
FLNA p.Ala1188Thr 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/flna-p-ile602 (accessed [today's date]).

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