Is CFB p.Asp108Asn (c.322G>A) pathogenic?

CFB p.Asp108Asn (c.322G>A) is classified Uncertain significance in CFB (ClinVar, Single submitter, 1 submitter; last evaluated 2021-05-13). AlphaMissense: likely benign (0.0973); Very rare (popmax 0.0011%, sas).

How common is CFB p.Asp108Asn (c.322G>A) in the general population?

CFB p.Asp108Asn (c.322G>A) is very rare (popmax 0.0011%, sas) (gnomAD).

What do computational predictors say about CFB p.Asp108Asn (c.322G>A)?

AlphaMissense predicts likely benign (score 0.0973) — an in-silico prediction, not a clinical call.

CFB p.Asp108Asn

c.322G>A · rs865856889 · VCV1693908

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0973 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0973	likely benign
REVEL	0.162	moderately benign-leaning
SaProt	LLR -6.50	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 8.6	GERP 1.5, phastCons 1
Overall
CADD	21.7	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 0.0011% South Asian · 1/91,070 alleles

Filtering AF 6.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.9e-05%

Overall 0.000274% 4/1,460,768 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0011%	91,070
European (non-Finnish)	0.000254%	393,335

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.Asp108Asn
Coding: c.322G>A
MANE Select: NM_001710
dbSNP: rs865856889
Type: single nucleotide variant
Location: chr6:31947030 (GRCh38)
Gene constraint: LOEUF 0.719 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 86.54 · 28 PDB
Residue 108: a disulfide bond; the sushi 2 domain

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

Similar variants

CFB p.Asp108His 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-asp108asn (accessed [today's date]).

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