Is COPB1 p.Pro138Ala (c.412C>G) pathogenic?

COPB1 p.Pro138Ala (c.412C>G) is classified Uncertain significance in COPB1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-05-21). AlphaMissense: likely benign (0.3056); Absent from gnomAD v4.1.

How common is COPB1 p.Pro138Ala (c.412C>G) in the general population?

COPB1 p.Pro138Ala (c.412C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about COPB1 p.Pro138Ala (c.412C>G)?

AlphaMissense predicts likely benign (score 0.3056) — an in-silico prediction, not a clinical call.

COPB1 p.Pro138Ala

c.412C>G · VCV4005743

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.3056 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Computational evidence

Protein change
AlphaMissense	0.3056	likely benign
REVEL	0.46	indeterminate
SaProt	LLR -13.04	damaging
⇒ SaProt calls this damaging; AlphaMissense does not; REVEL is indeterminate.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 12	GERP 2.2, phastCons 1
Regional constraint	o/e 0.37	unconstrained · MANE · 545 bp · p 1.6e-06 · regional, not allelic
Overall
CADD	27.2	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: COPB1
Protein: p.Pro138Ala
Coding: c.412C>G
MANE Select: NM_001144061
Type: single nucleotide variant
Location: chr11:14493721 (GRCh38)
Gene constraint: LOEUF 0.269 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 82.55

Full COPB1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

COPB1 p.Pro138Ser Uncertain significance ★ same residue
COPB1 p.Met16Val Uncertain significance ★★ ⚠ same type
COPB1 p.Ser410Arg Uncertain significance ★★ ⚠ same type
COPB1 c.958-4T>G Likely benign ★★ same type
COPB1 p.Leu271= Likely benign ★★ same type
COPB1 p.Phe551Val Pathogenic ★ same type
COPB1 c.1455+2T>C Uncertain significance ★ same type
COPB1 c.1616+2T>C 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/copb1-p-pro138ala (accessed [today's date]).

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