Is PRICKLE2 p.Asp677= (c.2031C>T) pathogenic?

PRICKLE2 p.Asp677= (c.2031C>T) is classified Likely benign in PRICKLE2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-09-10). Ultra-rare (popmax 0.034%, sas); Associated with Progressive myoclonic epilepsy type 5.

What condition is associated with PRICKLE2 p.Asp677= (c.2031C>T)?

PRICKLE2 p.Asp677= (c.2031C>T) is associated with Progressive myoclonic epilepsy type 5 (ClinVar).

How common is PRICKLE2 p.Asp677= (c.2031C>T) in the general population?

PRICKLE2 p.Asp677= (c.2031C>T) is ultra-rare (popmax 0.034%, sas) (gnomAD).

PRICKLE2 p.Asp677=

c.2031C>T · rs779135952 · VCV2962899

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.034%, sas)

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 -2.1	GERP -3.8
Overall
CADD	2.525	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.034% South Asian · 31/91,058 alleles

Filtering AF 0.0246% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0214%

Overall 0.00192% 31/1,610,468 alleles · ultra-rare exomes 30/1,458,258 · genomes 1/152,210 · 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.Asp677=
Coding: c.2031C>T
MANE Select: NM_198859
dbSNP: rs779135952
Type: single nucleotide variant
Location: chr3:64099555 (GRCh38)
Gene constraint: LOEUF 0.34 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 56.41
Residue 677: the 'disordered' region

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.Asp677Asn Uncertain significance ★ ⚠ same residue
PRICKLE2 p.Asp677Gly 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-asp677 (accessed [today's date]).

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