Is AFF3 p.Ala383Thr (c.1147G>A) pathogenic?

AFF3 p.Ala383Thr (c.1147G>A) is classified Uncertain significance in AFF3 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-09-28). AlphaMissense: likely benign (0.0731); Ultra-rare (popmax 0.0165%, mid); Associated with Inborn genetic diseases.

What condition is associated with AFF3 p.Ala383Thr (c.1147G>A)?

AFF3 p.Ala383Thr (c.1147G>A) is associated with Inborn genetic diseases (ClinVar).

How common is AFF3 p.Ala383Thr (c.1147G>A) in the general population?

AFF3 p.Ala383Thr (c.1147G>A) is ultra-rare (popmax 0.0165%, mid) (gnomAD).

What do computational predictors say about AFF3 p.Ala383Thr (c.1147G>A)?

AlphaMissense predicts likely benign (score 0.0731) — an in-silico prediction, not a clinical call.

AFF3 p.Ala383Thr

c.1147G>A · VCV4571471

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0731 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0165%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.0731	likely benign
REVEL	0.28	benign-leaning
SaProt	LLR -6.54	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.25 · evaluated, not missing
Constraint at this position
Conservation	phyloP 6	GERP 1.9, phastCons 1
Regional constraint	o/e 0.97	unconstrained · MANE · 413 kb · p 0.58 · regional, not allelic
Overall
CADD	23.6	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.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0165% Middle Eastern · 1/6,062 alleles

Filtering AF 0.00122% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00104%

Overall 0.00155% 25/1,614,098 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0165%	6,062
European (non-Finnish)	0.00186%	53,636
Admixed American	0.00167%	60,014
African / African-American	0.00133%	75,038

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: AFF3
Protein: p.Ala383Thr
Coding: c.1147G>A
MANE Select: NM_001386135
Type: single nucleotide variant
Location: chr2:99649663 (GRCh38)
Gene constraint: LOEUF 0.318 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 52.20
Residue 383: the 'disordered' region

Full AFF3 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

AFF3 p.Ala233Thr Pathogenic ★★ ⚠ same condition
AFF3 p.Ile1147Asn Uncertain significance ★★ ⚠ same condition
AFF3 p.Leu370Phe Uncertain significance ★★ ⚠ same condition
AFF3 p.Pro321Leu Uncertain significance ★★ ⚠ same condition
AFF3 p.Ser222Thr Uncertain significance ★★ ⚠ same condition
AFF3 p.Thr950Met Uncertain significance ★★ ⚠ same condition
AFF3 p.Ala1100Val Uncertain significance ★ ⚠ same condition
AFF3 p.Ala1103Thr 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/aff3-p-ala383thr (accessed [today's date]).

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