CDKL5 p.Leu227=
c.681A>G · rs1057522628 · VCV386866
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00296%, eas)
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 6.9 | GERP 2.5, phastCons 1 |
| Overall | ||
| CADD | 12.13 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00296%
East Asian · 1/33,829 alleles
Overall
9.12e-05%
1/1,096,902 alleles · very rare
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
- CDKL5
- Protein
- p.Leu227=
- Coding
- c.681A>G
- MANE Select
- NM_001323289
- dbSNP
- rs1057522628
- Type
- single nucleotide variant
- Location
- chrX:18588080 (GRCh38)
- Structure
- AlphaFold pLDDT 53.76 · 3 PDB
- Residue 227
- the protein kinase domain; an α-helix
Similar variants
- CDKL5 p.Leu227Pro Uncertain significance ★★ ⚠ same residue
- CDKL5 p.Leu227Arg Uncertain significance ★ ⚠ same residue
- CDKL5 p.Leu227_Pro231delinsAspArgGlyThr Uncertain significance same residue
- CDKL5 c.146-1G>A Pathogenic ★★★ same type
- CDKL5 p.Ala157Pro Likely pathogenic ★★★ same type
- CDKL5 p.Ala157Val Likely pathogenic ★★★ same type
- CDKL5 p.Ala40Val Pathogenic ★★★ same type
- CDKL5 p.Arg178Gln Pathogenic ★★★ 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/cdkl5-p-leu227 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown