Is FPR1 p.Cys126= (c.378C>T) pathogenic?

FPR1 p.Cys126= (c.378C>T) is classified Likely benign in FPR1 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-03). Ultra-rare (popmax 0.0107%, afr); Associated with gingival disorder.

What condition is associated with FPR1 p.Cys126= (c.378C>T)?

FPR1 p.Cys126= (c.378C>T) is associated with gingival disorder (ClinVar).

How common is FPR1 p.Cys126= (c.378C>T) in the general population?

FPR1 p.Cys126= (c.378C>T) is ultra-rare (popmax 0.0107%, afr) (gnomAD).

FPR1 p.Cys126=

c.378C>T · rs776424230 · VCV1090402

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0107%, afr)

Conditions

gingival disorder

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.25	GERP -3.7, phastCons 0.005
Overall
CADD	4.927	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0107% African / African-American · 8/74,896 alleles

Filtering AF 0.00528% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00381%

Overall 0.0026% 42/1,614,010 alleles · ultra-rare exomes 32/1,461,892 · genomes 10/152,118 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0107%	9,362
Admixed American	0.005%	19,999
Remaining individualsnot grpmax-eligible	0.0048%	20,827
European (non-Finnish)	0.0022%	45,386
South Asian	0.0022%	45,540

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: FPR1
Protein: p.Cys126=
Coding: c.378C>T
MANE Select: NM_002029
dbSNP: rs776424230
Type: single nucleotide variant
Location: chr19:51746617 (GRCh38)
Gene constraint: LOEUF 1.921 · pLI 0.13 (gnomAD)
Structure: AlphaFold pLDDT 84.17 · 5 PDB
Residue 126: an α-helix

Full FPR1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

gingival disorder — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

FPR1 p.Ala225Val Uncertain significance ★★ ⚠ same condition
FPR1 p.Ala315Thr Uncertain significance ★★ ⚠ same condition
FPR1 p.Ile146Val Uncertain significance ★★ ⚠ same condition
FPR1 p.Ile147Thr Uncertain significance ★★ ⚠ same condition
FPR1 p.Ile216Val Uncertain significance ★★ ⚠ same condition
FPR1 p.Ile228Phe Uncertain significance ★★ ⚠ same condition
FPR1 p.Met197Ile Uncertain significance ★★ ⚠ same condition
FPR1 p.Met275Thr Uncertain significance ★★ ⚠ same condition

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/fpr1-p-cys126 (accessed [today's date]).

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