CYC1 p.Pro323=
c.969G>A · VCV3626758
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00333%, amr)
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 -4.6 | GERP -3 |
| Overall | ||
| CADD | 0.523 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00333%
Admixed American · 2/59,972 alleles
Filtering AF
0.00111%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0009%
Overall
0.00149%
24/1,613,586 alleles · very rare
exomes 21/1,461,502 · genomes 3/152,084 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00333% | 29,986 |
| European (non-Finnish) | 0.0017% | 58,996 |
| African / African-American | 0.00134% | 74,876 |
| South Asian | 0.0011% | 91,070 |
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
- CYC1
- Protein
- p.Pro323=
- Coding
- c.969G>A
- MANE Select
- NM_001916
- Type
- single nucleotide variant
- Location
- chr8:144097327 (GRCh38)
- Gene constraint
- LOEUF 0.583 · pLI 0.85 (gnomAD)
- Structure
- AlphaFold pLDDT 86.37 · 5 PDB
Similar variants
- CYC1 p.Pro323Ser Uncertain significance ★ ⚠ same residue
- CYC1 p.Ala4Val Uncertain significance ★★ ⚠ same type
- CYC1 p.Ala5Thr Uncertain significance ★★ ⚠ same type
- CYC1 p.Arg285Gln Uncertain significance ★★ ⚠ same type
- CYC1 p.Arg287His Uncertain significance ★★ ⚠ same type
- CYC1 p.Arg308Gln Uncertain significance ★★ ⚠ same type
- CYC1 p.Asn159Ser Uncertain significance ★★ ⚠ same type
- CYC1 p.Asp173Asn 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/cyc1-p-pro323 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown