Is CFAP44 p.Ile256Phe (c.766A>T) pathogenic?

CFAP44 p.Ile256Phe (c.766A>T) is classified Uncertain significance in CFAP44 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-01-18). AlphaMissense: ambiguous (0.5568); Very rare (popmax 8.47e-05%, nfe); Associated with Inborn genetic diseases.

What condition is associated with CFAP44 p.Ile256Phe (c.766A>T)?

CFAP44 p.Ile256Phe (c.766A>T) is associated with Inborn genetic diseases (ClinVar).

How common is CFAP44 p.Ile256Phe (c.766A>T) in the general population?

CFAP44 p.Ile256Phe (c.766A>T) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

What do computational predictors say about CFAP44 p.Ile256Phe (c.766A>T)?

AlphaMissense predicts ambiguous (score 0.5568) — an in-silico prediction, not a clinical call.

CFAP44 p.Ile256Phe

c.766A>T · VCV3832308

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.5568 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.47e-05%, nfe)

Missense predictors

1/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.5568	ambiguous
REVEL	0.169	moderately benign-leaning
SaProt	LLR -12.09	damaging
⇒ SaProt calls this damaging; REVEL does not; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.8	GERP 2.4, phastCons 1
Regional constraint	o/e 0.93	unconstrained · MANE · 129 kb · p 0.0018 · regional, not allelic
Overall
CADD	24.6	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.47e-05% European (non-Finnish) · 1/1,180,034 alleles

Overall 6.84e-05% 1/1,461,862 alleles · very rare

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: CFAP44
Protein: p.Ile256Phe
Coding: c.766A>T
MANE Select: NM_001164496
Type: single nucleotide variant
Location: chr3:113409230 (GRCh38)
Gene constraint: LOEUF 0.697 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 74.87 · 1 PDB

Full CFAP44 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CFAP44 p.Ala161Gly Uncertain significance ★ ⚠ same condition
CFAP44 p.Ala712Val Uncertain significance ★ ⚠ same condition
CFAP44 p.Arg495Gln Uncertain significance ★ ⚠ same condition
CFAP44 p.Arg522Gln Uncertain significance ★ ⚠ same condition
CFAP44 p.Arg557Gln Uncertain significance ★ ⚠ same condition
CFAP44 p.Arg585Cys Uncertain significance ★ ⚠ same condition
CFAP44 p.Arg606Met Uncertain significance ★ ⚠ same condition
CFAP44 p.Arg703Met 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/cfap44-p-ile256phe (accessed [today's date]).

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