Is AXIN2 p.Ser296= (c.888C>T) pathogenic?

AXIN2 p.Ser296= (c.888C>T) is classified Benign/Likely benign in AXIN2 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2026-01-26). Very rare (popmax 0.00668%, afr); Associated with hereditary neoplastic syndrome.

What condition is associated with AXIN2 p.Ser296= (c.888C>T)?

AXIN2 p.Ser296= (c.888C>T) is associated with hereditary neoplastic syndrome, oligodontia-cancer predisposition syndrome (ClinVar).

How common is AXIN2 p.Ser296= (c.888C>T) in the general population?

AXIN2 p.Ser296= (c.888C>T) is very rare (popmax 0.00668%, afr) (gnomAD).

AXIN2 p.Ser296=

c.888C>T · rs755968982 · VCV392788

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00668%, afr)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -3	GERP -4.2
Overall
CADD	5.679	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00668% African / African-American · 5/74,822 alleles

Filtering AF 0.00255% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00218%

Overall 0.00305% 49/1,606,868 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00668%	14,964
Remaining individualsnot grpmax-eligible	0.00482%	20,750
East Asian	0.00448%	22,319
European (non-Finnish)	0.00331%	30,170

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: AXIN2
Protein: p.Ser296=
Coding: c.888C>T
MANE Select: NM_004655
dbSNP: rs755968982
Type: single nucleotide variant
Location: chr17:65549588 (GRCh38)
Gene constraint: LOEUF 0.397 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 61.71 · 1 PDB

Full AXIN2 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: oligodontia-cancer predisposition syndrome

Similar variants

AXIN2 p.Ser296Arg Uncertain significance ★ ⚠ same residue
AXIN2 p.Ser296Gly Uncertain significance ★ ⚠ same residue
AXIN2 c.1060-1G>C Likely pathogenic ★★ same condition
AXIN2 c.1200+1G>A Likely pathogenic ★★ same condition
AXIN2 c.1201-1G>C Likely pathogenic ★★ same condition
AXIN2 c.1713-1G>A Likely pathogenic ★★ same condition
AXIN2 c.815+1G>A Pathogenic/Likely pathogenic ★★ same condition
AXIN2 c.816-1G>A Likely 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/axin2-p-ser296 (accessed [today's date]).

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