Is APC p.Gln233Pro (c.698A>C) pathogenic?

APC p.Gln233Pro (c.698A>C) is classified Uncertain significance in APC (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-10-14). AlphaMissense: ambiguous (0.3832); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with APC p.Gln233Pro (c.698A>C)?

APC p.Gln233Pro (c.698A>C) is associated with hereditary neoplastic syndrome, familial adenomatous polyposis 1 (ClinVar).

How common is APC p.Gln233Pro (c.698A>C) in the general population?

APC p.Gln233Pro (c.698A>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about APC p.Gln233Pro (c.698A>C)?

AlphaMissense predicts ambiguous (score 0.3832) — an in-silico prediction, not a clinical call.

APC p.Gln233Pro

c.698A>C · rs2149684577 · VCV1502172

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.3832 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.3832	ambiguous
REVEL	0.561	indeterminate
SaProt	—	not scored · why
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 11	phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 61 kb · p 0.82 · regional, not allelic
Overall
CADD	26.1	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: APC
Protein: p.Gln233Pro
Coding: c.698A>C
MANE Select: NM_000038
dbSNP: rs2149684577
Type: single nucleotide variant
Location: chr5:112792498 (GRCh38)
Gene constraint: LOEUF 0.321 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Residue 233: an α-helix

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: familial adenomatous polyposis 1

Similar variants

APC p.Gln233Ter Pathogenic ★★ same residue
APC p.Gln233= Likely benign ★★ same residue
APC p.Gln233Arg Uncertain significance ★ same residue
APC p.Gln233Leu Uncertain significance ★ same residue
APC p.Gln233Lys Uncertain significance ★ same residue
APC p.Gln233fs Pathogenic ★ same residue
APC c.1312+3A>C Likely pathogenic ★★★ same condition
APC c.1312+3A>G 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/apc-p-gln233pro (accessed [today's date]).

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