Is PRICKLE2 p.Pro474= (c.1422G>A) pathogenic?

PRICKLE2 p.Pro474= (c.1422G>A) is classified Likely benign in PRICKLE2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-02-15). Ultra-rare (popmax 0.0164%, mid); Associated with Progressive myoclonic epilepsy type 5.

What condition is associated with PRICKLE2 p.Pro474= (c.1422G>A)?

PRICKLE2 p.Pro474= (c.1422G>A) is associated with Progressive myoclonic epilepsy type 5 (ClinVar).

How common is PRICKLE2 p.Pro474= (c.1422G>A) in the general population?

PRICKLE2 p.Pro474= (c.1422G>A) is ultra-rare (popmax 0.0164%, mid) (gnomAD).

PRICKLE2 p.Pro474=

c.1422G>A · rs778956632 · VCV1151628

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0164%, mid)

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 -20	GERP -9.8
Overall
CADD	0.235	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0164% Middle Eastern · 1/6,084 alleles

Filtering AF 0.00164% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00142%

Overall 0.00235% 38/1,614,018 alleles · ultra-rare exomes 35/1,461,890 · genomes 3/152,128 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0164%	6,084
Remaining individualsnot grpmax-eligible	0.008%	12,498
African / African-American	0.00267%	37,445
European (non-Finnish)	0.00237%	42,144
East Asian	0.00223%	44,890
Admixed American	0.00167%	60,004

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.Pro474=
Coding: c.1422G>A
MANE Select: NM_198859
dbSNP: rs778956632
Type: single nucleotide variant
Location: chr3:64147068 (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.Pro474Leu 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
PRICKLE2 p.Ala650Val 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-pro474 (accessed [today's date]).

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