Is BCO2 p.Ala223Gly (c.668C>G) pathogenic?

BCO2 p.Ala223Gly (c.668C>G) is classified Uncertain significance in BCO2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-04-25). AlphaMissense: ambiguous (0.3427); Absent from gnomAD v4.1.

How common is BCO2 p.Ala223Gly (c.668C>G) in the general population?

BCO2 p.Ala223Gly (c.668C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BCO2 p.Ala223Gly (c.668C>G)?

AlphaMissense predicts ambiguous (score 0.3427) — an in-silico prediction, not a clinical call.

BCO2 p.Ala223Gly

c.668C>G · rs1234579244 · VCV2540229

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3427 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,613,272)

Missense predictors

2/2 damaging

REVEL, SaProt · AlphaMissense no call

Computational evidence

Protein change
AlphaMissense	0.3427	ambiguous
REVEL	0.838	moderately pathogenic-leaning
SaProt	LLR -10.74	damaging
⇒ REVEL and SaProt both call this damaging; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.5	GERP 2, phastCons 1
Regional constraint	o/e 0.97	unconstrained · MANE · 42 kb · p 0.37 · regional, not allelic
Overall
CADD	24.9	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

No allele count reported in gnomAD v4.1 (AN 1,613,272). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: BCO2
Protein: p.Ala223Gly
Coding: c.668C>G
MANE Select: NM_031938
dbSNP: rs1234579244
Type: single nucleotide variant
Location: chr11:112194687 (GRCh38)
Gene constraint: LOEUF 1.047 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 88.41

Full BCO2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BCO2 p.Arg472Ter Likely benign ★★ same type
BCO2 p.Ala115Val Uncertain significance ★ ⚠ same type
BCO2 p.Ala318Val Uncertain significance ★ ⚠ same type
BCO2 p.Ala437Ser Uncertain significance ★ ⚠ same type
BCO2 p.Arg184Trp Uncertain significance ★ ⚠ same type
BCO2 p.Arg253Gln Uncertain significance ★ ⚠ same type
BCO2 p.Arg27Trp Uncertain significance ★ ⚠ same type
BCO2 p.Arg315Gln 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/bco2-p-ala223gly (accessed [today's date]).

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