Is AFF2 p.Pro559Thr (c.1675C>A) pathogenic?

AFF2 p.Pro559Thr (c.1675C>A) is classified Uncertain significance in AFF2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-10-03). AlphaMissense: likely benign (0.0709); Absent from gnomAD v4.1.

How common is AFF2 p.Pro559Thr (c.1675C>A) in the general population?

AFF2 p.Pro559Thr (c.1675C>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about AFF2 p.Pro559Thr (c.1675C>A)?

AlphaMissense predicts likely benign (score 0.0709) — an in-silico prediction, not a clinical call.

AFF2 p.Pro559Thr

c.1675C>A · rs2521890749 · VCV2497812

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0709 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0709	likely benign
REVEL	0.076	moderately benign-leaning
SaProt	LLR -6.81	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 3.8	GERP -2.4, phastCons 1
Regional constraint	o/e 0.94	unconstrained · MANE · 304 kb · p 0.17 · regional, not allelic
Overall
CADD	18.75	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

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: AFF2
Protein: p.Pro559Thr
Coding: c.1675C>A
MANE Select: NM_002025
dbSNP: rs2521890749
Type: single nucleotide variant
Location: chrX:148955720 (GRCh38)
Structure: AlphaFold pLDDT 49.27

Full AFF2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

AFF2 c.3267+5G>C Uncertain significance ★★ same type
AFF2 p.Ala1197Thr Uncertain significance ★★ ⚠ same type
AFF2 p.Ala171Pro Uncertain significance ★★ ⚠ same type
AFF2 p.Arg1238Cys Uncertain significance ★★ ⚠ same type
AFF2 p.Arg1295Cys Uncertain significance ★★ ⚠ same type
AFF2 p.Arg670His Uncertain significance ★★ ⚠ same type
AFF2 p.Asn77Ile Uncertain significance ★★ ⚠ same type
AFF2 p.Asp187Glu Uncertain significance ★★ ⚠ same type

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/aff2-p-pro559thr (accessed [today's date]).

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