Is ABCF1 p.Ser166Cys (c.497C>G) pathogenic?

ABCF1 p.Ser166Cys (c.497C>G) is classified Uncertain significance in ABCF1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-19). AlphaMissense: likely benign (0.0925); Ultra-rare (popmax 0.0167%, amr).

How common is ABCF1 p.Ser166Cys (c.497C>G) in the general population?

ABCF1 p.Ser166Cys (c.497C>G) is ultra-rare (popmax 0.0167%, amr) (gnomAD).

What do computational predictors say about ABCF1 p.Ser166Cys (c.497C>G)?

AlphaMissense predicts likely benign (score 0.0925) — an in-silico prediction, not a clinical call.

ABCF1 p.Ser166Cys

c.497C>G · VCV4141172

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0925 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0167%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0925	likely benign
REVEL	0.085	moderately benign-leaning
SaProt	LLR -9.45	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.5	phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 12 kb · p 0.96 · regional, not allelic
Overall
CADD	24.3	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0167% Admixed American · 10/60,008 alleles

Filtering AF 0.009% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00681%

Overall 0.00149% 24/1,612,866 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0167%	6,001
African / African-American	0.00933%	10,715
South Asian	0.00769%	13,011

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: ABCF1
Protein: p.Ser166Cys
Coding: c.497C>G
MANE Select: NM_001025091
Type: single nucleotide variant
Location: chr6:30579938 (GRCh38)
Gene constraint: LOEUF 0.69 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 71.68 · 1 PDB
Residue 166: a modified residue (phosphoserine); the 'disordered' region

Full ABCF1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ABCF1 p.Ala117Thr Uncertain significance ★ ⚠ same type
ABCF1 p.Ala194Thr Uncertain significance ★ ⚠ same type
ABCF1 p.Ala221Thr Uncertain significance ★ ⚠ same type
ABCF1 p.Ala251Thr Uncertain significance ★ ⚠ same type
ABCF1 p.Ala276Val Uncertain significance ★ ⚠ same type
ABCF1 p.Ala328Asp Uncertain significance ★ ⚠ same type
ABCF1 p.Ala427Thr Uncertain significance ★ ⚠ same type
ABCF1 p.Ala598Gly 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/abcf1-p-ser166cys (accessed [today's date]).

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