CDKL5 p.Arg890=
c.2668C>A · rs1354788122 · VCV1091899
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00174%, afr)
Conditions
2
Angelman syndrome-like
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 4.9 | GERP 0.85, phastCons 1 |
| Overall | ||
| CADD | 9.631 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00174%
African / African-American · 1/57,313 alleles
Overall
8.26e-05%
1/1,210,297 alleles · very rare
exomes 0/1,098,178 · genomes 1/112,119 · joint denominator
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.Arg890=
- Coding
- c.2668C>A
- MANE Select
- NM_001323289
- dbSNP
- rs1354788122
- Type
- single nucleotide variant
- Location
- chrX:18628542 (GRCh38)
- Structure
- AlphaFold pLDDT 53.76 · 3 PDB
- Residue 890
- the 'disordered' region; a UniProt-annotated variant site (in dee2); a UniProt-annotated variant site (found in a patient with infatile spasms; likely pathogenic)
Similar variants
- CDKL5 p.Arg890Trp Uncertain significance ★ ⚠ same residue
- CDKL5 p.Arg890fs Pathogenic ★ same residue
- CDKL5 c.146-1G>A Pathogenic ★★★ same condition
- CDKL5 p.Ala157Pro Likely pathogenic ★★★ same condition
- CDKL5 p.Ala157Val Likely pathogenic ★★★ same condition
- CDKL5 p.Ala40Val Pathogenic ★★★ same condition
- CDKL5 p.Arg178Gln Pathogenic ★★★ same condition
- CDKL5 p.Arg717= Likely pathogenic ★★★ 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/cdkl5-p-arg890 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown