Is POLE p.Phe1109= (c.3327T>C) pathogenic?

POLE p.Phe1109= (c.3327T>C) is classified Likely benign in POLE (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-01-18). Very rare (popmax 0.0011%, nfe); Associated with facial dysmorphism-immunodeficiency-livedo-short stature syndrome.

What condition is associated with POLE p.Phe1109= (c.3327T>C)?

POLE p.Phe1109= (c.3327T>C) is associated with facial dysmorphism-immunodeficiency-livedo-short stature syndrome, colorectal cancer, susceptibility to, 12, hereditary neoplastic syndrome (ClinVar).

How common is POLE p.Phe1109= (c.3327T>C) in the general population?

POLE p.Phe1109= (c.3327T>C) is very rare (popmax 0.0011%, nfe) (gnomAD).

POLE p.Phe1109=

Q: How is Facial dysmorphism-immunodeficiency-livedo-short stature syndrome inherited?

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

c.3327T>C · rs748049159 · VCV473586

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

very rare (popmax 0.0011%, nfe)

Conditions

facial dysmorphism-immunodeficiency-livedo-short stature syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 1.6	GERP -2.2, phastCons 1
Overall
CADD	8.889	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% European (non-Finnish) · 13/1,180,000 alleles

Filtering AF 0.000615% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000474%

Overall 0.000805% 13/1,614,066 alleles · very rare exomes 11/1,461,812 · genomes 2/152,254 · joint denominator

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: POLE
Protein: p.Phe1109=
Coding: c.3327T>C
MANE Select: NM_006231
dbSNP: rs748049159
Type: single nucleotide variant
Location: chr12:132657919 (GRCh38)
Gene constraint: LOEUF 0.75 · pLI <0.01 · ClinGen HI 1/3 (gnomAD)
Structure: AlphaFold pLDDT 80.32 · 18 PDB
Residue 1109: an α-helix; a UniProt-annotated variant site (in imagei)

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

Disease context

facial dysmorphism-immunodeficiency-livedo-short stature syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: colorectal cancer, susceptibility to, 12 hereditary neoplastic syndrome intrauterine growth retardation, metaphyseal dysplasia, adrenal hypoplasia congenita, genital anomalies, and immunodeficiency

For Facial dysmorphism-immunodeficiency-livedo-short stature syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

POLE p.Phe1109Cys Uncertain significance ★★ ⚠ same residue
POLE p.Phe1109Leu Uncertain significance ★ ⚠ same residue
POLE c.1686+32C>G Pathogenic/Likely pathogenic ★★ same condition
POLE c.5678+1G>T Pathogenic ★★ same condition
POLE p.Leu424Val Pathogenic ★★ same condition
POLE c.1020+5G>A Uncertain significance ★★ same condition
POLE c.1106+3G>C Uncertain significance ★★ same condition
POLE c.1106+4A>G 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/pole-p-phe1109 (accessed [today's date]).

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