Is CFD p.His66Arg (c.197A>G) pathogenic?

CFD p.His66Arg (c.197A>G) is classified Uncertain significance in CFD (ClinVar, Single submitter, 1 submitter; last evaluated 2024-11-05). AlphaMissense: likely pathogenic (0.8464); Absent from gnomAD v4.1.

How common is CFD p.His66Arg (c.197A>G) in the general population?

CFD p.His66Arg (c.197A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CFD p.His66Arg (c.197A>G)?

AlphaMissense predicts likely pathogenic (score 0.8464) — an in-silico prediction, not a clinical call.

CFD p.His66Arg

c.197A>G · VCV3694378

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.8464 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,567,232)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.8464	likely pathogenic
REVEL	0.861	moderately pathogenic-leaning
SaProt	LLR -10.43	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 8.8	GERP 2.4, phastCons 1
Regional constraint	o/e 1.40	unconstrained · MANE · 3,545 bp · p 9.1e-15 · regional, not allelic
Overall
CADD	25.4	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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

No allele count reported in gnomAD v4.1 (AN 1,567,232). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: CFD
Protein: p.His66Arg
Coding: c.197A>G
MANE Select: NM_001928
Type: single nucleotide variant
Location: chr19:860758 (GRCh38)
Gene constraint: LOEUF 1.948 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 91.19 · 40 PDB
Residue 66: the peptidase s1 domain; an α-helix; an active site; a disulfide bond

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

Similar variants

CFD c.212+2T>G Likely pathogenic ★★ same type
CFD c.56-1G>C Likely pathogenic ★★ same type
CFD p.Tyr95Ter Pathogenic ★★ same type
ELANE p.Gly203Arg Pathogenic ★★ same type
ELANE p.Ser126Leu Pathogenic ★★ ⚠ same type
CFD p.Ala100Pro Uncertain significance ★★ ⚠ same type
CFD p.Ala129Thr Uncertain significance ★★ ⚠ same type
CFD p.Ala143Val 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/cfd-p-his66arg (accessed [today's date]).

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