Is ACO1 p.Arg34Cys (c.100C>T) pathogenic?

ACO1 p.Arg34Cys (c.100C>T) is classified Uncertain significance in ACO1 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-10-14). AlphaMissense: likely benign (0.1027); Very rare (popmax 0.00737%, nfe).

How common is ACO1 p.Arg34Cys (c.100C>T) in the general population?

ACO1 p.Arg34Cys (c.100C>T) is very rare (popmax 0.00737%, nfe) (gnomAD).

What do computational predictors say about ACO1 p.Arg34Cys (c.100C>T)?

AlphaMissense predicts likely benign (score 0.1027) — an in-silico prediction, not a clinical call.

ACO1 p.Arg34Cys

c.100C>T · rs757411707 · VCV3137036

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1027 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00737%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1027	likely benign
REVEL	0.215	benign-leaning
SaProt	LLR -8.71	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 3.9	GERP 0.14, phastCons 0.92
Regional constraint	o/e 0.87	unconstrained · MANE · 45 kb · p 1.2e-05 · regional, not allelic
Overall
CADD	23.2	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 0.00737% European (non-Finnish) · 87/1,179,908 alleles

Filtering AF 0.00605% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00565%

Overall 0.00607% 98/1,613,824 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00737%	13,562
East Asian	0.00446%	22,445
South Asian	0.00439%	22,768
African / African-American	0.00401%	24,966
Admixed American	0.00167%	59,980
Remaining individualsnot grpmax-eligible	0.0016%	62,482

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: ACO1
Protein: p.Arg34Cys
Coding: c.100C>T
MANE Select: NM_002197
dbSNP: rs757411707
Type: single nucleotide variant
Location: chr9:32407263 (GRCh38)
Gene constraint: LOEUF 0.839 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 94.75 · 2 PDB
Residue 34: an α-helix

Full ACO1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ACO1 p.Ala665Val Uncertain significance ★★ ⚠ same type
ACO1 p.Arg885His Uncertain significance ★★ ⚠ same type
ACO1 p.Gly831Arg Uncertain significance ★★ ⚠ same type
ACO1 p.Ala794= Benign ★★ same type
ACO1 p.Asp569= Benign ★★ same type
ACO1 p.His252= Benign ★★ same type
ACO1 p.Pro443= Benign/Likely benign ★★ same type
ACO1 c.474+1G>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/aco1-p-arg34cys (accessed [today's date]).

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