Is PRICKLE2 p.Lys444= (c.1332G>A) pathogenic?

PRICKLE2 p.Lys444= (c.1332G>A) is classified Likely benign in PRICKLE2 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-04). Ultra-rare (popmax 0.0217%, amr); Associated with Progressive myoclonic epilepsy type 5.

What condition is associated with PRICKLE2 p.Lys444= (c.1332G>A)?

PRICKLE2 p.Lys444= (c.1332G>A) is associated with Progressive myoclonic epilepsy type 5 (ClinVar).

How common is PRICKLE2 p.Lys444= (c.1332G>A) in the general population?

PRICKLE2 p.Lys444= (c.1332G>A) is ultra-rare (popmax 0.0217%, amr) (gnomAD).

PRICKLE2 p.Lys444=

c.1332G>A · rs949245293 · VCV774388

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0217%, amr)

Conditions

Progressive myoclonic epilepsy type 5

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 2.7	GERP 4.9, phastCons 1
Overall
CADD	9.505	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0217% Admixed American · 13/60,016 alleles

Filtering AF 0.0127% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0101%

Overall 0.000867% 14/1,614,034 alleles · ultra-rare exomes 6/1,461,816 · genomes 8/152,218 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0217%	4,617
Remaining individualsnot grpmax-eligible	0.0016%	62,488

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: PRICKLE2
Protein: p.Lys444=
Coding: c.1332G>A
MANE Select: NM_198859
dbSNP: rs949245293
Type: single nucleotide variant
Location: chr3:64147158 (GRCh38)
Gene constraint: LOEUF 0.34 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 56.41

Full PRICKLE2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Progressive myoclonic epilepsy type 5 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

PRICKLE2 p.Lys444Glu Uncertain significance ★ ⚠ same residue
PRICKLE2 p.Lys444Asn Uncertain significance ★ ⚠ same residue
PRICKLE2 p.Ala143Thr Uncertain significance ★★ ⚠ same condition
PRICKLE2 p.Ala146Val Uncertain significance ★★ ⚠ same condition
PRICKLE2 p.Ala149Ser Uncertain significance ★★ same condition
PRICKLE2 p.Ala309Gly Uncertain significance ★★ ⚠ same condition
PRICKLE2 p.Ala33Ser Uncertain significance ★★ ⚠ same condition
PRICKLE2 p.Ala548Thr 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/prickle2-p-lys444 (accessed [today's date]).

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