Is CDKL5 p.Pro857Arg (c.2570C>G) pathogenic?

CDKL5 p.Pro857Arg (c.2570C>G) is classified Benign in CDKL5 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-02-12). AlphaMissense: likely benign (0.1877); Absent from gnomAD v4.1; Associated with developmental and epileptic encephalopathy, 2.

What condition is associated with CDKL5 p.Pro857Arg (c.2570C>G)?

CDKL5 p.Pro857Arg (c.2570C>G) is associated with developmental and epileptic encephalopathy, 2 (ClinVar).

How common is CDKL5 p.Pro857Arg (c.2570C>G) in the general population?

CDKL5 p.Pro857Arg (c.2570C>G) is absent from gnomAD v4.1 (gnomAD).

How is CDKL5-deficiency disorder inherited?

Typically X-linked dominant (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about CDKL5 p.Pro857Arg (c.2570C>G)?

AlphaMissense predicts likely benign (score 0.1877) — an in-silico prediction, not a clinical call.

CDKL5 p.Pro857Arg

c.2570C>G · rs1403947122 · VCV2951623

Benign Single submitter

Classification

Benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1877 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

developmental and epileptic encephalopathy, 2

Computational evidence

Protein change
AlphaMissense	0.1877	likely benign
REVEL	0.141	moderately benign-leaning
SaProt	LLR -7.36	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 1.4, phastCons 1
Regional constraint	o/e 0.70	unconstrained · MANE · 30 kb · p 1.5e-11 · regional, not allelic
Overall
CADD	22.0	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CDKL5
Protein: p.Pro857Arg
Coding: c.2570C>G
MANE Select: NM_001323289
dbSNP: rs1403947122
Type: single nucleotide variant
Location: chrX:18628444 (GRCh38)
Structure: AlphaFold pLDDT 53.76 · 3 PDB
Residue 857: the 'disordered' region; a UniProt-annotated variant site (in dee2); a UniProt-annotated variant site (found in a patient with infatile spasms; likely pathogenic)

Full CDKL5 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

developmental and epileptic encephalopathy, 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For CDKL5-deficiency disorder (Orphanet):

Inheritance: X-linked dominant
Onset: Infancy, Neonatal

Similar variants

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
CDKL5 p.Arg948Ter Pathogenic ★★★ same condition
CDKL5 p.Asp193Gly 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-pro857arg (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown