Is FLNA p.Ala477Val (c.1430C>T) pathogenic?

FLNA p.Ala477Val (c.1430C>T) is classified Uncertain significance in FLNA (ClinVar, Single submitter, 1 submitter; last evaluated 2022-01-15). AlphaMissense: ambiguous (0.3407); Absent from gnomAD v4.1; Associated with Melnick-Needles syndrome.

What condition is associated with FLNA p.Ala477Val (c.1430C>T)?

FLNA p.Ala477Val (c.1430C>T) is associated with Melnick-Needles syndrome, heterotopia, periventricular, X-linked dominant, otopalatodigital syndrome type 2 (ClinVar).

How common is FLNA p.Ala477Val (c.1430C>T) in the general population?

FLNA p.Ala477Val (c.1430C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about FLNA p.Ala477Val (c.1430C>T)?

AlphaMissense predicts ambiguous (score 0.3407) — an in-silico prediction, not a clinical call.

FLNA p.Ala477Val

c.1430C>T · rs2522758008 · VCV2083670

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3407 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

Melnick-Needles syndrome

Computational evidence

Protein change
AlphaMissense	0.3407	ambiguous
REVEL	0.572	indeterminate
SaProt	LLR -7.44	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.8, phastCons 1
Regional constraint	o/e 0.80	unconstrained · MANE · 6,571 bp · p 2.7e-08 · regional, not allelic
Overall
CADD	25.5	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: FLNA
Protein: p.Ala477Val
Coding: c.1430C>T
MANE Select: NM_001110556
dbSNP: rs2522758008
Type: single nucleotide variant
Location: chrX:154365486 (GRCh38)
Structure: AlphaFold pLDDT 77.37 · 26 PDB

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

Disease context

Melnick-Needles syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

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

Similar variants

FLNA p.Ala477Pro Uncertain significance ★★ ⚠ same residue
FLNA p.Ala477Thr 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

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-ala477val (accessed [today's date]).

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