Is CFAP99 p.Arg503Trp (c.1507C>T) pathogenic?

CFAP99 p.Arg503Trp (c.1507C>T) is classified Uncertain significance in CFAP99 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-02-21). Very rare (popmax 0.00262%, nfe).

How common is CFAP99 p.Arg503Trp (c.1507C>T) in the general population?

CFAP99 p.Arg503Trp (c.1507C>T) is very rare (popmax 0.00262%, nfe) (gnomAD).

CFAP99 p.Arg503Trp

c.1507C>T · VCV3832461

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00262%, nfe)

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.185	benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.4	GERP -0.43, phastCons 0.99
Regional constraint	o/e 1.08	unconstrained · MANE · 36 kb · p 0.016 · regional, not allelic
Overall
CADD	26.1	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00262% European (non-Finnish) · 30/1,146,918 alleles

Filtering AF 0.00186% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00161%

Overall 0.00423% 65/1,535,932 alleles · very rare

Ancestry group	Frequency	1 in
Ashkenazi Jewishnot grpmax-eligible	0.0977%	1,023
Remaining individualsnot grpmax-eligible	0.00667%	14,998
European (non-Finnish)grpmax	0.00262%	38,231
East Asian	0.00244%	40,928
Admixed American	0.00196%	50,980
South Asian	0.00119%	84,056

Ashkenazi Jewish shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: CFAP99
Protein: p.Arg503Trp
Coding: c.1507C>T
MANE Select: NM_001193282
Type: single nucleotide variant
Location: chr4:2460088 (GRCh38)
Gene constraint: LOEUF 1.203 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.28

Full CFAP99 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CFAP99 p.Arg503Gln Uncertain significance ★ same residue
CFAP99 p.Ala255Thr Uncertain significance ★ same type
CFAP99 p.Ala307Thr Uncertain significance ★ same type
CFAP99 p.Ala366Thr Uncertain significance ★ same type
CFAP99 p.Ala369Gly Uncertain significance ★ same type
CFAP99 p.Ala396Val Uncertain significance ★ same type
CFAP99 p.Ala423Thr Uncertain significance ★ same type
CFAP99 p.Ala428Thr Uncertain significance ★ same type

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/cfap99-p-arg503trp (accessed [today's date]).

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