Is BFSP1 p.Ile628= (c.1884C>T) pathogenic?

BFSP1 p.Ile628= (c.1884C>T) is classified Likely benign in BFSP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-07-06). Ultra-rare (popmax 0.033%, mid); Associated with cataract 33.

What condition is associated with BFSP1 p.Ile628= (c.1884C>T)?

BFSP1 p.Ile628= (c.1884C>T) is associated with cataract 33 (ClinVar).

How common is BFSP1 p.Ile628= (c.1884C>T) in the general population?

BFSP1 p.Ile628= (c.1884C>T) is ultra-rare (popmax 0.033%, mid) (gnomAD).

BFSP1 p.Ile628=

c.1884C>T · rs181266441 · VCV2719201

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.033%, mid)

Conditions

cataract 33

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 -0.95	GERP -3.5
Overall
CADD	1.046	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.033% Middle Eastern · 2/6,062 alleles

Filtering AF 0.00726% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00515%

Overall 0.00204% 33/1,614,074 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.033%	3,031
East Asian	0.0156%	6,411
South Asian	0.0022%	45,543
European (non-Finnish)	0.00169%	59,002
Remaining individualsnot grpmax-eligible	0.0016%	62,506
African / African-American	0.00133%	75,020

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: BFSP1
Protein: p.Ile628=
Coding: c.1884C>T
MANE Select: NM_001195
dbSNP: rs181266441
Type: single nucleotide variant
Location: chr20:17494188 (GRCh38)
Gene constraint: LOEUF 1.371 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 64.66
Residue 628: the 'tail' region

Full BFSP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

cataract 33 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

BFSP1 p.Ala643Thr Uncertain significance ★★ ⚠ same condition
BFSP1 p.Arg560Cys Uncertain significance ★★ ⚠ same condition
BFSP1 p.Arg69Trp Uncertain significance ★★ same condition
BFSP1 p.Asp19Asn Uncertain significance ★★ ⚠ same condition
BFSP1 p.Gln294Arg Uncertain significance ★★ ⚠ same condition
BFSP1 p.Gly46Trp Uncertain significance ★★ ⚠ same condition
BFSP1 p.Ile271Thr Uncertain significance ★★ ⚠ same condition
BFSP1 p.Leu68Phe 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/bfsp1-p-ile628 (accessed [today's date]).

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