PRG4 p.Cys84=
c.252T>C · VCV4923905
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00667%, 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 0.28 | GERP 0.4, phastCons 1 |
| Overall | ||
| CADD | 9.329 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00667%
Admixed American · 4/59,986 alleles
Filtering AF
0.00226%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00135%
Overall
0.00062%
10/1,613,788 alleles · very rare
exomes 8/1,461,670 · genomes 2/152,118 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00667% | 14,997 |
| Finnishnot grpmax-eligible | 0.00468% | 21,347 |
| African / African-American | 0.00401% | 24,965 |
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
- PRG4
- Protein
- p.Cys84=
- Coding
- c.252T>C
- MANE Select
- NM_005807
- Type
- single nucleotide variant
- Location
- chr1:186301644 (GRCh38)
- Gene constraint
- LOEUF 0.801 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 48.76
- Residue 84
- a disulfide bond; the smb 2 domain
Similar variants
- PRG4 p.Arg1166Ter Pathogenic/Likely pathogenic ★★ same type
- PRG4 p.Ser1355Ter Pathogenic/Likely pathogenic ★★ same type
- PRG4 p.Ala1246Val Uncertain significance ★★ ⚠ same type
- PRG4 p.Asp87Asn Uncertain significance ★★ ⚠ same type
- PRG4 p.Lys287Arg Uncertain significance ★★ ⚠ same type
- PRG4 p.Pro409Leu Uncertain significance ★★ ⚠ same type
- PRG4 p.Val1399Phe Uncertain significance ★★ ⚠ same type
- PRG4 c.-30-30T>A Benign ★★ 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/prg4-p-cys84 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown