Is ABCG5 p.Pro33Arg (c.98C>G) pathogenic?

ABCG5 p.Pro33Arg (c.98C>G) is classified Uncertain significance in ABCG5 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2024-11-01). AlphaMissense: likely benign (0.0757); Very rare (popmax 0.00534%, afr); Associated with sitosterolemia 2.

What condition is associated with ABCG5 p.Pro33Arg (c.98C>G)?

ABCG5 p.Pro33Arg (c.98C>G) is associated with sitosterolemia 2, sitosterolemia (ClinVar).

How common is ABCG5 p.Pro33Arg (c.98C>G) in the general population?

ABCG5 p.Pro33Arg (c.98C>G) is very rare (popmax 0.00534%, afr) (gnomAD).

How is Sitosterolemia inherited?

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

What do computational predictors say about ABCG5 p.Pro33Arg (c.98C>G)?

AlphaMissense predicts likely benign (score 0.0757) — an in-silico prediction, not a clinical call.

ABCG5 p.Pro33Arg

c.98C>G · rs778605187 · VCV288360

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

likely benign

0.0757 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00534%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

sitosterolemia 2

Computational evidence

Protein change
AlphaMissense	0.0757	likely benign
REVEL	0.242	benign-leaning
SaProt	LLR -6.84	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 0.72	GERP -1.4
Regional constraint	o/e 1.09	unconstrained · MANE · 26 kb · p 0.0064 · regional, not allelic
Overall
CADD	2.352	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 0.00534% African / African-American · 4/74,890 alleles

Filtering AF 0.00175% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0013%

Overall 0.00193% 31/1,610,174 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00534%	18,722
East Asian	0.00223%	44,790
European (non-Finnish)	0.00221%	45,340

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: ABCG5
Protein: p.Pro33Arg
Coding: c.98C>G
MANE Select: NM_022436
dbSNP: rs778605187
Type: single nucleotide variant
Location: chr2:43838582 (GRCh38)
Gene constraint: LOEUF 1.219 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 85.48 · 8 PDB

Full ABCG5 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

sitosterolemia 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: sitosterolemia

For Sitosterolemia (Orphanet):

Inheritance: Autosomal recessive
Onset: All ages

Similar variants

ABCG5 p.Pro33= Conflicting classifications of pathogenicity ★ same residue
ABCG5 p.Pro33Leu Conflicting classifications of pathogenicity ★ ⚠ same residue
ABCG5 c.1464-1G>C Pathogenic/Likely pathogenic ★★ same condition
ABCG5 c.1762+1G>A Pathogenic/Likely pathogenic ★★ same condition
ABCG5 c.634+1G>C Likely pathogenic ★★ same condition
ABCG5 c.904+1G>A Pathogenic ★★ same condition
ABCG5 p.Arg183Ter Pathogenic/Likely pathogenic ★★ same condition
ABCG5 p.Arg243Ter Pathogenic ★★ 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/abcg5-p-pro33arg (accessed [today's date]).

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