Is CFH p.Ala307= (c.921A>C) pathogenic?

CFH p.Ala307= (c.921A>C) is classified Benign/Likely benign in CFH (ClinVar, Multiple submitters, 10 submitters; last evaluated 2026-02-04). Common (popmax 94.1%, eas) — too common for a highly-penetrant pathogenic allele; Associated with basal laminar drusen.

What condition is associated with CFH p.Ala307= (c.921A>C)?

CFH p.Ala307= (c.921A>C) is associated with basal laminar drusen, hemolytic uremic syndrome, atypical, susceptibility to, 1, complement factor H deficiency (ClinVar).

CFH p.Ala307=

Q: How common is CFH p.Ala307= (c.921A>C) in the general population?

CFH p.Ala307= (c.921A>C) is common (popmax 94.1%, eas) — too common for a highly-penetrant pathogenic allele (gnomAD).

c.921A>C · rs1061147 · VCV294488

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 10 submitters

gnomAD v4.1

Common

common (popmax 94.1%, eas) — too common for a highly-penetrant pathogenic allele

Conditions

basal laminar drusen

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 -0.35	GERP -3.5
Overall
CADD	3.942	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 94.1% East Asian · 42,152/44,802 alleles

Filtering AF 93.3% ClinGen BA1/BS1 input FAF95, joint · FAF99 93%

Overall 63.4% 1,022,671/1,612,176 alleles · common

Ancestry group	Frequency	1 in
East Asiangrpmax	94.1%	1
Admixed American	79.8%	1
South Asian	69.6%	1
Ashkenazi Jewishnot grpmax-eligible	65.5%	2
Remaining individualsnot grpmax-eligible	64.1%	2
Middle Eastern	63.2%	2
European (non-Finnish)	61.7%	2
African / African-American	57.8%	2
Finnishnot grpmax-eligible	56%	2
Amishnot grpmax-eligible	52%	2

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: CFH
Protein: p.Ala307=
Coding: c.921A>C
MANE Select: NM_000186
dbSNP: rs1061147
Type: single nucleotide variant
Location: chr1:196685194 (GRCh38)
Gene constraint: LOEUF 0.43 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 78.54 · 51 PDB
Residue 307: a disulfide bond; the sushi 5 domain

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

Disease context

basal laminar drusen — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hemolytic uremic syndrome, atypical, susceptibility to, 1 complement factor H deficiency age related macular degeneration 4 atypical hemolytic-uremic syndrome

Similar variants

CFH c.1337-2A>G Likely pathogenic ★★ same condition
CFH c.1520-1G>A Pathogenic/Likely pathogenic ★★ same condition
CFH c.2236+1G>C Likely pathogenic ★★ same condition
CFH c.3493+1G>A Pathogenic/Likely pathogenic ★★ same condition
CFH c.350+1G>T Pathogenic/Likely pathogenic ★★ same condition
CFH c.619+1G>A Pathogenic/Likely pathogenic ★★ same condition
CFH p.Arg1215Leu Likely pathogenic ★★ ⚠ same condition
CFH p.Arg1215Ter Pathogenic/Likely pathogenic ★★ 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/cfh-p-ala307 (accessed [today's date]).

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