Is CPEB3 p.Pro63Ala (c.187C>G) pathogenic?

CPEB3 p.Pro63Ala (c.187C>G) is classified Uncertain significance in CPEB3 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-02-28). AlphaMissense: likely benign (0.0457); Rare (popmax 0.245%, eas).

How common is CPEB3 p.Pro63Ala (c.187C>G) in the general population?

CPEB3 p.Pro63Ala (c.187C>G) is rare (popmax 0.245%, eas) (gnomAD).

What do computational predictors say about CPEB3 p.Pro63Ala (c.187C>G)?

AlphaMissense predicts likely benign (score 0.0457) — an in-silico prediction, not a clinical call.

CPEB3 p.Pro63Ala

c.187C>G · rs761306247 · VCV2456873

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0457 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.245%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0457	likely benign
REVEL	0.02	moderately benign-leaning
SaProt	LLR -5.29	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 4.8	GERP -0.53, phastCons 1
Regional constraint	o/e 0.90	unconstrained · MANE · 129 kb · p 0.0054 · regional, not allelic
Overall
CADD	21.5	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.245% East Asian · 103/42,076 alleles

Filtering AF 0.207% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.192%

Overall 0.0075% 116/1,547,124 alleles · rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.245%	409
African / African-American	0.00544%	18,371
Remaining individualsnot grpmax-eligible	0.00501%	19,944
South Asian	0.00242%	41,289
Admixed American	0.00197%	50,826
European (non-Finnish)	0.000262%	381,588

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: CPEB3
Protein: p.Pro63Ala
Coding: c.187C>G
MANE Select: NM_014912
dbSNP: rs761306247
Type: single nucleotide variant
Location: chr10:92240164 (GRCh38)
Gene constraint: LOEUF 0.585 · pLI 0.60 (gnomAD)
Structure: AlphaFold pLDDT 58.59 · 6 PDB
Residue 63: the 'disordered' region

Full CPEB3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CPEB3 p.Pro63Thr Uncertain significance ★ ⚠ same residue
CPEB3 p.Val280= Benign ★★ same type
CPEB3 p.Ala101Ser Uncertain significance ★ ⚠ same type
CPEB3 p.Ala118Thr Uncertain significance ★ ⚠ same type
CPEB3 p.Ala254Pro Uncertain significance ★ ⚠ same type
CPEB3 p.Ala388Thr Uncertain significance ★ ⚠ same type
CPEB3 p.Ala409Gly Uncertain significance ★ ⚠ same type
CPEB3 p.Ala61Val Uncertain significance ★ ⚠ same type

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/cpeb3-p-pro63ala (accessed [today's date]).

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