PROKR2 p.Lys221=
c.663G>A · rs1051636587 · VCV750010
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00333%, amr)
Conditions
1
hypogonadotropic hypogonadism 3 with or without anosmia
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 0.25 | GERP -1.1, phastCons 0.99 |
| Overall | ||
| CADD | 5.369 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00333%
Admixed American · 2/60,030 alleles
Filtering AF
0.000553%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.000207%
Overall
0.000186%
3/1,614,220 alleles · very rare
exomes 3/1,461,888 · genomes 0/152,332 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00333% | 30,015 |
| European (non-Finnish) | 8.47e-05% | 1,180,034 |
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
- PROKR2
- Protein
- p.Lys221=
- Coding
- c.663G>A
- MANE Select
- NM_144773
- dbSNP
- rs1051636587
- Type
- single nucleotide variant
- Location
- chr20:5302532 (GRCh38)
- Gene constraint
- LOEUF 1.492 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 78.50
Similar variants
- PROKR2 p.Lys221Gln Uncertain significance ★ ⚠ same residue
- PROKR2 p.Arg164Gln Likely pathogenic ★★ same condition
- PROKR2 p.Glu231Lys Likely pathogenic ★★ ⚠ same condition
- PROKR2 p.Tyr316Ter Likely pathogenic ★★ same condition
- PROKR2 p.Ala103Val Uncertain significance ★★ ⚠ same condition
- PROKR2 p.Ala129Thr Uncertain significance ★★ ⚠ same condition
- PROKR2 p.Ala156Thr Uncertain significance ★★ same condition
- PROKR2 p.Arg135Cys Uncertain significance ★★ ⚠ 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/prokr2-p-lys221 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown