Is ALDOA p.Arg123His (c.368G>A) pathogenic?

ALDOA p.Arg123His (c.368G>A) is classified Uncertain significance in ALDOA (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-18). AlphaMissense: likely benign (0.2474); Very rare (popmax 0.00466%, nfe); Associated with glycogen storage disease due to aldolase A deficiency.

What condition is associated with ALDOA p.Arg123His (c.368G>A)?

ALDOA p.Arg123His (c.368G>A) is associated with glycogen storage disease due to aldolase A deficiency (ClinVar).

How common is ALDOA p.Arg123His (c.368G>A) in the general population?

ALDOA p.Arg123His (c.368G>A) is very rare (popmax 0.00466%, nfe) (gnomAD).

What do computational predictors say about ALDOA p.Arg123His (c.368G>A)?

AlphaMissense predicts likely benign (score 0.2474) — an in-silico prediction, not a clinical call.

ALDOA p.Arg123His

Q: How is Glycogen storage disease due to aldolase A deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.368G>A · rs752587498 · VCV2171117

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2474 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00466%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

glycogen storage disease due to aldolase A deficiency

Computational evidence

Protein change
AlphaMissense	0.2474	likely benign
REVEL	0.464	indeterminate
SaProt	LLR -9.84	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 1.9, phastCons 1
Regional constraint	o/e 0.91	unconstrained · MANE · 3,311 bp · p 0.028 · regional, not allelic
Overall
CADD	25.6	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM R69H vs ClinVar R123H) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00466% European (non-Finnish) · 55/1,180,016 alleles

Filtering AF 0.00367% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00329%

Overall 0.00378% 61/1,613,664 alleles · very rare

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0048%	20,827
European (non-Finnish)grpmax	0.00466%	21,455
African / African-American	0.00267%	37,424
South Asian	0.0011%	91,080

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: ALDOA
Protein: p.Arg123His
Coding: c.368G>A
MANE Select: NM_001243177
dbSNP: rs752587498
Type: single nucleotide variant
Location: chr16:30067543 (GRCh38)
Gene constraint: LOEUF 0.821 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 96.53 · 8 PDB
Residue 123: a β-strand

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

Disease context

glycogen storage disease due to aldolase A deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Glycogen storage disease due to aldolase A deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Neonatal

Similar variants

ALDOA p.Arg123= Likely benign ★ same residue
ALDOA p.Arg123Cys Uncertain significance ★ ⚠ same residue
ALDOA p.Ala334Val Pathogenic/Likely pathogenic ★★ same condition
ALDOA c.274+5G>A Uncertain significance ★★ same condition
ALDOA p.Ala142Val Uncertain significance ★★ same condition
ALDOA p.Ala217Thr Uncertain significance ★★ same condition
ALDOA p.Ala310Val Uncertain significance ★★ same condition
ALDOA p.Ala377Ser 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/aldoa-p-arg123his (accessed [today's date]).

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