Is PRICKLE2 p.Lys74= (c.222G>A) pathogenic?

PRICKLE2 p.Lys74= (c.222G>A) is classified Likely benign in PRICKLE2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-02-24). Very rare (popmax 0.000593%, nfe); Associated with Progressive myoclonic epilepsy type 5.

What condition is associated with PRICKLE2 p.Lys74= (c.222G>A)?

PRICKLE2 p.Lys74= (c.222G>A) is associated with Progressive myoclonic epilepsy type 5 (ClinVar).

How common is PRICKLE2 p.Lys74= (c.222G>A) in the general population?

PRICKLE2 p.Lys74= (c.222G>A) is very rare (popmax 0.000593%, nfe) (gnomAD).

PRICKLE2 p.Lys74=

c.222G>A · rs2107045863 · VCV1138319

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.000593%, nfe)

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 0.13	GERP -3.3, phastCons 0.94
Overall
CADD	9.386	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000593% European (non-Finnish) · 7/1,179,926 alleles

Filtering AF 0.000247% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000159%

Overall 0.000434% 7/1,614,086 alleles · very rare exomes 7/1,461,776 · genomes 0/152,310 · 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: PRICKLE2
Protein: p.Lys74=
Coding: c.222G>A
MANE Select: NM_198859
dbSNP: rs2107045863
Type: single nucleotide variant
Location: chr3:64163052 (GRCh38)
Gene constraint: LOEUF 0.34 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 56.41
Residue 74: the pet domain

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.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
PRICKLE2 p.Ala650Val Uncertain significance ★★ ⚠ same condition
PRICKLE2 p.Ala707Thr 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-lys74 (accessed [today's date]).

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