Is AOC2 p.Arg557His (c.1670G>A) pathogenic?

AOC2 p.Arg557His (c.1670G>A) is classified Uncertain significance in AOC2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-12-21). AlphaMissense: likely benign (0.0911); Ultra-rare (popmax 0.0165%, mid).

How common is AOC2 p.Arg557His (c.1670G>A) in the general population?

AOC2 p.Arg557His (c.1670G>A) is ultra-rare (popmax 0.0165%, mid) (gnomAD).

What do computational predictors say about AOC2 p.Arg557His (c.1670G>A)?

AlphaMissense predicts likely benign (score 0.0911) — an in-silico prediction, not a clinical call.

AOC2 p.Arg557His

c.1670G>A · rs200887039 · VCV2402172

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0911 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0165%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0911	likely benign
REVEL	0.151	moderately benign-leaning
SaProt	LLR -9.81	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 4.4	GERP 1.1, phastCons 0.98
Regional constraint	o/e 1.05	unconstrained · MANE · 5,718 bp · p 0.1 · regional, not allelic
Overall
CADD	23.9	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 0.000875% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00065%

Overall 0.00149% 24/1,614,146 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0165%	6,062
Admixed American	0.00333%	30,011
South Asian	0.00329%	30,363
East Asian	0.00223%	44,880
European (non-Finnish)	0.00136%	73,750
African / African-American	0.00133%	75,026

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: AOC2
Protein: p.Arg557His
Coding: c.1670G>A
MANE Select: NM_009590
dbSNP: rs200887039
Type: single nucleotide variant
Location: chr17:42849167 (GRCh38)
Gene constraint: LOEUF 1.292 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 94.10

Full AOC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

AOC2 p.Arg597= Benign ★★ same type
AOC2 p.Pro141Leu Benign ★★ same type
AOC2 p.Ala104Thr Uncertain significance ★ ⚠ same type
AOC2 p.Ala218Thr Uncertain significance ★ ⚠ same type
AOC2 p.Ala415Pro Uncertain significance ★ ⚠ same type
AOC2 p.Ala450Val Uncertain significance ★ ⚠ same type
AOC2 p.Ala519Gly Uncertain significance ★ ⚠ same type
AOC2 p.Ala592Thr 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/aoc2-p-arg557his (accessed [today's date]).

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