Is CFAP77 p.Ser177Phe (c.530C>T) pathogenic?

CFAP77 p.Ser177Phe (c.530C>T) is classified Uncertain significance in CFAP77 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-04-04). AlphaMissense: likely pathogenic (0.8176); Very rare (popmax 0.0028%, nfe).

How common is CFAP77 p.Ser177Phe (c.530C>T) in the general population?

CFAP77 p.Ser177Phe (c.530C>T) is very rare (popmax 0.0028%, nfe) (gnomAD).

What do computational predictors say about CFAP77 p.Ser177Phe (c.530C>T)?

AlphaMissense predicts likely pathogenic (score 0.8176) — an in-silico prediction, not a clinical call.

CFAP77 p.Ser177Phe

c.530C>T · VCV4001657

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.8176 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0028%, nfe)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.8176	likely pathogenic · top 8% in CFAP77
REVEL	0.19	benign-leaning
SaProt	LLR -7.89	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	Δ0.36	acceptor gain · deltas
Constraint at this position
Conservation	phyloP 7.4	GERP 2.1, phastCons 1
Regional constraint	o/e 0.95	unconstrained · MANE · 162 kb · p 0.31 · regional, not allelic
Overall
CADD	31.0	PHRED · no single calibrated threshold — expert panels disagree

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM S213F vs ClinVar S177F) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0028% European (non-Finnish) · 33/1,178,806 alleles

Filtering AF 0.002% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00176%

Overall 0.0036% 58/1,611,540 alleles · very rare exomes 55/1,459,438 · genomes 3/152,102 · joint denominator

Ancestry group	Frequency	1 in
Finnishnot grpmax-eligible	0.0312%	3,200
Remaining individualsnot grpmax-eligible	0.00641%	15,594
European (non-Finnish)grpmax	0.0028%	35,721
East Asian	0.00223%	44,814

Finnish 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: CFAP77
Protein: p.Ser177Phe
Coding: c.530C>T
MANE Select: NM_001282957
Type: single nucleotide variant
Location: chr9:132537606 (GRCh38)
Gene constraint: LOEUF 1.092 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 73.75 · 2 PDB

Full CFAP77 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CFAP77 c.196-16283C>G Uncertain significance ★ ⚠ same type
CFAP77 c.196-16315C>T Uncertain significance ★ ⚠ same type
CFAP77 c.196-16327A>G Uncertain significance ★ ⚠ same type
CFAP77 c.196-16333C>T Uncertain significance ★ ⚠ same type
CFAP77 c.196-16357C>T Uncertain significance ★ ⚠ same type
CFAP77 p.Ala127Val Uncertain significance ★ ⚠ same type
CFAP77 p.Ala256Val Uncertain significance ★ ⚠ same type
CFAP77 p.Arg118Gln 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/cfap77-p-ser177phe (accessed [today's date]).

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