Is CFB p.Ile170Met (c.510C>G) pathogenic?

CFB p.Ile170Met (c.510C>G) is classified Uncertain significance in CFB (ClinVar, Single submitter, 1 submitter; last evaluated 2022-10-05). AlphaMissense: likely benign (0.1757); Very rare (popmax 8.47e-05%, nfe).

How common is CFB p.Ile170Met (c.510C>G) in the general population?

CFB p.Ile170Met (c.510C>G) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

What do computational predictors say about CFB p.Ile170Met (c.510C>G)?

AlphaMissense predicts likely benign (score 0.1757) — an in-silico prediction, not a clinical call.

CFB p.Ile170Met

c.510C>G · rs770945324 · VCV1721015

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1757 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.47e-05%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.1757	likely benign
REVEL	0.436	indeterminate
SaProt	LLR -5.26	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.21	GERP 0.58, phastCons 0.97
Overall
CADD	20.4	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 8.47e-05% European (non-Finnish) · 1/1,180,022 alleles

Overall 6.85e-05% 1/1,460,750 alleles · very rare

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: CFB
Protein: p.Ile170Met
Coding: c.510C>G
MANE Select: NM_001710
dbSNP: rs770945324
Type: single nucleotide variant
Location: chr6:31947373 (GRCh38)
Gene constraint: LOEUF 0.719 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 86.54 · 28 PDB
Residue 170: a disulfide bond; the sushi 3 domain

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

Similar variants

CFB p.Ile170Val Uncertain significance ★ ⚠ same residue
CFB c.2140-1G>C Uncertain significance ★★ same type
CFB c.-3G>A Uncertain significance ★★ same type
CFB p.Ala162Val Uncertain significance ★★ ⚠ same type
CFB p.Ala289Val Uncertain significance ★★ ⚠ same type
CFB p.Ala567Gly Uncertain significance ★★ ⚠ same type
CFB p.Arg117Trp Uncertain significance ★★ ⚠ same type
CFB p.Arg138Gln 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/cfb-p-ile170met (accessed [today's date]).

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