Is CFAP45 p.Arg441Trp (c.1321C>T) pathogenic?

CFAP45 p.Arg441Trp (c.1321C>T) is classified Uncertain significance in CFAP45 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-01-28). AlphaMissense: likely benign (0.1404); Very rare (popmax 0.0022%, sas).

How common is CFAP45 p.Arg441Trp (c.1321C>T) in the general population?

CFAP45 p.Arg441Trp (c.1321C>T) is very rare (popmax 0.0022%, sas) (gnomAD).

What do computational predictors say about CFAP45 p.Arg441Trp (c.1321C>T)?

AlphaMissense predicts likely benign (score 0.1404) — an in-silico prediction, not a clinical call.

CFAP45 p.Arg441Trp

c.1321C>T · VCV3832321

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1404 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0022%, sas)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1404	likely benign
REVEL	0.178	moderately benign-leaning
SaProt	LLR -12.42	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	Δ0.28	donor gain · deltas
Pangolin	Δ0.20	gain · loss 0.09 · agrees with SpliceAI · independent
Constraint at this position
Conservation	phyloP 5.7	GERP 2.4, phastCons 1
Regional constraint	o/e 0.98	unconstrained · MANE · 28 kb · p 0.64 · regional, not allelic
Overall
CADD	34.0	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 0.0022% South Asian · 2/91,076 alleles

Filtering AF 0.00114% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000971%

Overall 0.00149% 24/1,613,908 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0022%	45,538
European (non-Finnish)	0.00178%	56,187
Remaining individualsnot grpmax-eligible	0.0016%	62,478

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: CFAP45
Protein: p.Arg441Trp
Coding: c.1321C>T
MANE Select: NM_012337
Type: single nucleotide variant
Location: chr1:159876587 (GRCh38)
Gene constraint: LOEUF 0.713 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.03 · 2 PDB
Residue 441: the trichohyalin-plectin-homology domain; a UniProt-annotated variant site (in htx11; loss of panaxonemal expression in respiratory cilia and in sperm flagella)

Full CFAP45 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CFAP45 p.Asp320Tyr Uncertain significance ★★ ⚠ same type
CFAP45 p.Lys518Glu Uncertain significance ★★ ⚠ same type
CFAP45 p.Asp222Gly Benign ★★ same type
CFAP45 p.Arg350Ter Likely pathogenic ★ same type
CFAP45 p.Ala15Pro Uncertain significance ★ ⚠ same type
CFAP45 p.Ala370Pro Uncertain significance ★ ⚠ same type
CFAP45 p.Ala436Val Uncertain significance ★ ⚠ same type
CFAP45 p.Ala69Thr 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/cfap45-p-arg441trp (accessed [today's date]).

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