Is ACO2 p.Ala78Thr (c.232G>A) pathogenic?

ACO2 p.Ala78Thr (c.232G>A) is classified Uncertain significance in ACO2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-09-14). AlphaMissense: likely benign (0.0694); Very rare (popmax 0.00133%, afr).

How common is ACO2 p.Ala78Thr (c.232G>A) in the general population?

ACO2 p.Ala78Thr (c.232G>A) is very rare (popmax 0.00133%, afr) (gnomAD).

What do computational predictors say about ACO2 p.Ala78Thr (c.232G>A)?

AlphaMissense predicts likely benign (score 0.0694) — an in-silico prediction, not a clinical call.

ACO2 p.Ala78Thr

c.232G>A · rs750705704 · VCV1944437

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0694 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00133%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0694	likely benign
REVEL	0.072	moderately benign-leaning
SaProt	LLR -7.24	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 4.1	GERP 1.5, phastCons 0.98
Regional constraint	o/e 0.91	unconstrained · MANE · 39 kb · p 0.35 · regional, not allelic
Overall
CADD	16.76	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 0.00133% African / African-American · 1/74,944 alleles

Filtering AF 0.000247% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000159%

Overall 0.000496% 8/1,614,030 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00133%	74,944
European (non-Finnish)	0.000593%	168,575

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: ACO2
Protein: p.Ala78Thr
Coding: c.232G>A
MANE Select: NM_001098
dbSNP: rs750705704
Type: single nucleotide variant
Location: chr22:41507849 (GRCh38)
Gene constraint: LOEUF 0.489 · pLI 0.98 (gnomAD)
Structure: AlphaFold pLDDT 95.44

Full ACO2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

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ACO2 p.Glu464Ter Pathogenic/Likely pathogenic ★★ same type
ACO2 p.Gly503Ter Pathogenic ★★ same type
ACO2 c.1605+5G>C Uncertain significance ★★ same type
ACO2 c.2208+5G>C Uncertain significance ★★ same type
ACO2 c.2208+5G>T 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/aco2-p-ala78thr (accessed [today's date]).

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