Is GBE1 p.Phe76Ser (c.227T>C) pathogenic?

GBE1 p.Phe76Ser (c.227T>C) is classified Uncertain significance in GBE1 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2023-05-29). AlphaMissense: likely pathogenic (0.6532); Absent from gnomAD v4.1; Associated with glycogen storage disease due to glycogen branching enzyme deficiency.

What condition is associated with GBE1 p.Phe76Ser (c.227T>C)?

GBE1 p.Phe76Ser (c.227T>C) is associated with glycogen storage disease due to glycogen branching enzyme deficiency (ClinVar).

How common is GBE1 p.Phe76Ser (c.227T>C) in the general population?

GBE1 p.Phe76Ser (c.227T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about GBE1 p.Phe76Ser (c.227T>C)?

AlphaMissense predicts likely pathogenic (score 0.6532) — an in-silico prediction, not a clinical call.

GBE1 p.Phe76Ser

Q: How is Glycogen storage disease due to glycogen branching enzyme deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.227T>C · rs1267044758 · VCV1402025

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely pathogenic

0.6532 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

glycogen storage disease due to glycogen branching enzyme deficiency

Computational evidence

Protein change
AlphaMissense	0.6532	likely pathogenic
REVEL	0.753	pathogenic-leaning
SaProt	LLR -12.51	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 2.2, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 271 kb · p 0.97 · regional, not allelic
Overall
CADD	29.1	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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

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: GBE1
Protein: p.Phe76Ser
Coding: c.227T>C
MANE Select: NM_000158
dbSNP: rs1267044758
Type: single nucleotide variant
Location: chr3:81705530 (GRCh38)
Gene constraint: LOEUF 1.211 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 96.30 · 3 PDB
Residue 76: a β-strand

Full GBE1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

glycogen storage disease due to glycogen branching enzyme deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Glycogen storage disease due to glycogen branching enzyme deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: All ages
Prevalence: 1-9 / 1 000 000 (Worldwide)

Similar variants

GBE1 c.1109-1G>T Likely pathogenic ★★ same condition
GBE1 c.1236+1G>A Likely pathogenic ★★ same condition
GBE1 c.1336-1G>A Pathogenic/Likely pathogenic ★★ same condition
GBE1 c.143+1G>A Pathogenic ★★ same condition
GBE1 c.143+2T>C Pathogenic/Likely pathogenic ★★ same condition
GBE1 c.144-1G>C Pathogenic/Likely pathogenic ★★ same condition
GBE1 c.1618+1G>A Pathogenic/Likely pathogenic ★★ same condition
GBE1 c.1803+2T>C Pathogenic/Likely pathogenic ★★ 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/gbe1-p-phe76ser (accessed [today's date]).

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