Is CFB p.Asn285Asp (c.853A>G) pathogenic?

CFB p.Asn285Asp (c.853A>G) is classified Uncertain significance in CFB (ClinVar, Single submitter, 1 submitter; last evaluated 2026-09-17). AlphaMissense: likely benign (0.2513); Absent from gnomAD v4.1; Associated with atypical hemolytic-uremic syndrome.

What condition is associated with CFB p.Asn285Asp (c.853A>G)?

CFB p.Asn285Asp (c.853A>G) is associated with atypical hemolytic-uremic syndrome (ClinVar).

How common is CFB p.Asn285Asp (c.853A>G) in the general population?

CFB p.Asn285Asp (c.853A>G) is absent from gnomAD v4.1 (gnomAD).

How is Atypical hemolytic uremic syndrome inherited?

Typically Autosomal dominant, Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about CFB p.Asn285Asp (c.853A>G)?

AlphaMissense predicts likely benign (score 0.2513) — an in-silico prediction, not a clinical call.

CFB p.Asn285Asp

c.853A>G · VCV4976833

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2513 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

atypical hemolytic-uremic syndrome

Computational evidence

Protein change
AlphaMissense	0.2513	likely benign
REVEL	0.259	benign-leaning
SaProt	LLR -6.36	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 11	GERP 1.8, phastCons 1
Overall
CADD	20.1	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CFB
Protein: p.Asn285Asp
Coding: c.853A>G
MANE Select: NM_001710
Type: single nucleotide variant
Location: chr6:31948037 (GRCh38)
Gene constraint: LOEUF 0.719 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 86.54 · 28 PDB
Residue 285: an α-helix; the vwfa domain

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

Disease context

atypical hemolytic-uremic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Atypical hemolytic uremic syndrome (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, Not applicable
Onset: All ages
Prevalence: 1-9 / 1 000 000 (United States)

Similar variants

CFB p.Asn285Ser Uncertain significance ★ ⚠ same residue
CFB p.Arg138Gln Uncertain significance ★★ ⚠ same condition
CFB p.Arg138Trp Uncertain significance ★★ ⚠ same condition
CFB p.Arg203Gln Uncertain significance ★★ same condition
CFB p.Arg379Cys Uncertain significance ★★ same condition
CFB p.Gln256Ter Uncertain significance ★★ same condition
CFB p.Glu601Lys Uncertain significance ★★ ⚠ same condition
CFB p.Ser284Asn 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/cfb-p-asn285asp (accessed [today's date]).

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