Is FLNA p.Asp217= (c.651C>T) pathogenic?

FLNA p.Asp217= (c.651C>T) is classified Benign/Likely benign in FLNA (ClinVar, Multiple submitters, 8 submitters; last evaluated 2026-01-28). Rare (popmax 0.253%, afr); Associated with otopalatodigital syndrome type 2.

What condition is associated with FLNA p.Asp217= (c.651C>T)?

FLNA p.Asp217= (c.651C>T) is associated with otopalatodigital syndrome type 2, heterotopia, periventricular, X-linked dominant, Melnick-Needles syndrome (ClinVar).

How common is FLNA p.Asp217= (c.651C>T) in the general population?

FLNA p.Asp217= (c.651C>T) is rare (popmax 0.253%, afr) (gnomAD).

FLNA p.Asp217=

c.651C>T · rs34644500 · VCV287592

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 8 submitters

gnomAD v4.1

Rare

rare (popmax 0.253%, afr)

Conditions

otopalatodigital syndrome type 2

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 -4.5	GERP -3.7
Overall
CADD	0.866	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.253% African / African-American · 145/57,313 alleles

Filtering AF 0.219% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.207%

Overall 0.0199% 241/1,209,449 alleles · rare exomes 167/1,097,331 · genomes 74/112,118 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.253%	395
Middle Eastern	0.115%	871
Remaining individualsnot grpmax-eligible	0.0861%	1,161
Admixed American	0.0196%	5,103
European (non-Finnish)	0.00436%	22,951
South Asian	0.00352%	28,424

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.Asp217=
Coding: c.651C>T
MANE Select: NM_001110556
dbSNP: rs34644500
Type: single nucleotide variant
Location: chrX:154367710 (GRCh38)
Structure: AlphaFold pLDDT 77.37 · 26 PDB
Residue 217: the 'actin-binding' region; the calponin-homology (ch) 2 domain

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

Disease context

otopalatodigital syndrome type 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: heterotopia, periventricular, X-linked dominant Melnick-Needles syndrome frontometaphyseal dysplasia familial thoracic aortic aneurysm and aortic dissection

Similar variants

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
FLNA p.Arg1515Ter 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-asp217 (accessed [today's date]).

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