Gbe1 — Glycogen Branching Enzyme 1 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| GBE1 | |
|---|---|
| Glycogen Branching Enzyme 1 | |
| Gene Symbol | GBE1 |
| Full Name | Glycogen Branching Enzyme 1 |
| Chromosome | 3p14 |
| NCBI Gene ID | [2635](https://www.ncbi.nlm.nih.gov/gene/2635) |
| Ensembl ID | [ENSG00000104408](https://www.ensembl.org/Homo_species/Gene/Summary?g=ENSG00000104408) |
| OMIM | [607589](https://www.omim.org/entry/607589) |
| UniProt ID | [Q9Y2R9](https://www.uniprot.org/uniprot/Q9Y2R9) |
| Associated Diseases | Adult Polyglucosan Body Disease, Glycogen Storage Disease Type IV |
| Expression | Liver, Muscle, Brain, Heart |
GBE1 (Glycogen Branching Enzyme 1) is a gene located on chromosome 3p14 that encodes the glycogen branching enzyme, also known as amylo-(1,4 to 1,6)-transglycosylase. This enzyme catalyzes the formation of branch points in glycogen by transferring terminal glucose residues from one chain to a hydroxyl group at the C-6 position of an interior glucose residue. The branching of glycogen is essential for its solubility and for creating numerous non-reducing ends that can be rapidly mobilized during energy demand.
The glycogen branching enzyme (GBE) plays a critical role in glycogen metabolism:
APBD is a late-onset glycogen storage disorder caused by GBE1 mutations. It is characterized by:
The accumulation of polyglucosan bodies in neurons is thought to contribute to neurodegeneration through:
The accumulation of polyglucosan bodies (also known as Lafora bodies) is a hallmark of Adult Polyglucosan Body Disease (APBD). These abnormal glycogen deposits consist of poorly branched glycogen-like material that is resistant to degradation. The formation of polyglucosan bodies is thought to occur due to:
GBE1 deficiency affects multiple tissues:
The study of Gbe1 — Glycogen Branching Enzyme 1 has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.