Is CFAP74 p.Arg300Trp (c.898C>T) pathogenic?

CFAP74 p.Arg300Trp (c.898C>T) is classified Uncertain significance in CFAP74 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-05-11). AlphaMissense: likely benign (0.14); Ultra-rare (popmax 0.0231%, sas).

How common is CFAP74 p.Arg300Trp (c.898C>T) in the general population?

CFAP74 p.Arg300Trp (c.898C>T) is ultra-rare (popmax 0.0231%, sas) (gnomAD).

What do computational predictors say about CFAP74 p.Arg300Trp (c.898C>T)?

AlphaMissense predicts likely benign (score 0.14) — an in-silico prediction, not a clinical call.

CFAP74 p.Arg300Trp

c.898C>T · rs200873327 · VCV3143681

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.14 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0231%, sas)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.14	likely benign
REVEL	0.093	moderately benign-leaning
SaProt	LLR -10.53	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.7	GERP -1.4, phastCons 0.64
Regional constraint	o/e 1.02	unconstrained · MANE · 69 kb · p 0.48 · regional, not allelic
Overall
CADD	23.9	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 0.0231% South Asian · 21/91,086 alleles

Filtering AF 0.0154% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0129%

Overall 0.00558% 90/1,614,082 alleles · ultra-rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0231%	4,337
East Asian	0.0134%	7,482
Remaining individualsnot grpmax-eligible	0.0096%	10,418
Admixed American	0.00666%	15,004
Finnishnot grpmax-eligible	0.00469%	21,321
European (non-Finnish)	0.00407%	24,583
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,592
African / African-American	0.00133%	75,068

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: CFAP74
Protein: p.Arg300Trp
Coding: c.898C>T
MANE Select: NM_001304360
dbSNP: rs200873327
Type: single nucleotide variant
Location: chr1:1970807 (GRCh38)
Gene constraint: LOEUF 0.799 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 69.38

Full CFAP74 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CFAP74 p.Lys394Met Uncertain significance ★★ ⚠ same type
CFAP74 p.Arg365Gln Likely benign ★★ same type
CFAP74 p.Gly5Ser Likely benign ★★ same type
CFAP74 p.Arg280Ter Likely pathogenic ★ same type
CFAP74 c.1851+2T>C Uncertain significance ★ same type
CFAP74 c.2176+30T>G Uncertain significance ★ same type
CFAP74 c.2176+34C>T Uncertain significance ★ same type
CFAP74 c.785+1G>A 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/cfap74-p-arg300trp (accessed [today's date]).

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