Is FOXA2 p.Ala56Ser (c.166G>T) pathogenic?

FOXA2 p.Ala56Ser (c.166G>T) is classified Uncertain significance in FOXA2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-11-26). AlphaMissense: likely benign (0.059); Very rare (popmax 0.00266%, afr); Associated with Inborn genetic diseases.

What condition is associated with FOXA2 p.Ala56Ser (c.166G>T)?

FOXA2 p.Ala56Ser (c.166G>T) is associated with Inborn genetic diseases (ClinVar).

How common is FOXA2 p.Ala56Ser (c.166G>T) in the general population?

FOXA2 p.Ala56Ser (c.166G>T) is very rare (popmax 0.00266%, afr) (gnomAD).

What do computational predictors say about FOXA2 p.Ala56Ser (c.166G>T)?

AlphaMissense predicts likely benign (score 0.059) — an in-silico prediction, not a clinical call.

FOXA2 p.Ala56Ser

c.166G>T · VCV4620200

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.059 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00266%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.059	likely benign
REVEL	0.147	moderately benign-leaning
SaProt	LLR -6.13	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4	GERP -2.3, phastCons 1
Regional constraint	o/e 1.21	unconstrained · MANE · 1,528 bp · p 0.00098 · regional, not allelic
Overall
CADD	18.24	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM A50S vs ClinVar A56S) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00266% African / African-American · 2/75,054 alleles

Filtering AF 0.000442% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000166%

Overall 0.000124% 2/1,609,188 alleles · very rare exomes 1/1,456,876 · genomes 1/152,312 · joint denominator

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: FOXA2
Protein: p.Ala56Ser
Coding: c.166G>T
MANE Select: NM_021784
Type: single nucleotide variant
Location: chr20:22583076 (GRCh38)
Gene constraint: LOEUF 0.518 · pLI 0.97 (gnomAD)
Structure: AlphaFold pLDDT 58.29 · 3 PDB
Residue 50 UniProt numbering: the 'transactivation domain 1' region

Full FOXA2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

FOXA2 p.Ala92Val Uncertain significance ★★ ⚠ same condition
FOXA2 p.Glu373Asp Uncertain significance ★★ ⚠ same condition
FOXA2 p.Met108Ile Uncertain significance ★★ ⚠ same condition
FOXA2 p.Met52Thr Uncertain significance ★★ same condition
FOXA2 p.Pro358Gln Uncertain significance ★★ ⚠ same condition
FOXA2 p.Ser99Leu Uncertain significance ★★ ⚠ same condition
FOXA2 p.Ala102Glu Uncertain significance ★ ⚠ same condition
FOXA2 p.Ala106Glu Uncertain significance ★ ⚠ 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/foxa2-p-ala56ser (accessed [today's date]).

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