Gid4 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Glucose-Induced Degradation 4 |
|---|
| Protein Name | GID4 |
| Gene | GID4 |
| UniProt ID | Q9H7M0 |
| PDB Structure | 5XFM, 5Y6Z |
| Molecular Weight | 34.2 kDa |
| Subcellular Localization | Cytoplasm, Nucleus |
| Protein Family | GID/CTLH complex |
GID4 (Glucose-Induced Degradation 4) is a key subunit of the GID ubiquitin ligase complex, a conserved E3 ligase system involved in protein degradation. The GID complex (also known as CTLH complex) targets specific proteins for ubiquitination and proteasomal degradation, playing important roles in metabolic regulation and cellular homeostasis.
GID4 contains multiple functional domains:
- WD40 repeats: Form a beta-propeller structure for substrate recognition
- CTLH domain: Required for complex formation
- RING finger domain: Present in some subunits for E3 activity
The GID complex performs essential cellular functions:
- Protein Degradation: Targets specific substrates for ubiquitination
- Metabolic Regulation: Regulates gluconeogenic enzymes
- Quality Control: Removes misfolded or damaged proteins
- Signal Transduction: Modulates various signaling pathways
- Stress Response: Responds to cellular stress conditions
GID4 dysfunction is implicated in:
- Alzheimer's Disease: Impaired protein homeostasis contributes to amyloid and tau pathology
- Parkinson's Disease: Altered degradation pathways affect α-synuclein clearance
- Cancer: Often dysregulated in various cancers
- Metabolic Disorders: Linked to diabetes and metabolic syndrome
- GID complex modulators: Under development for cancer and metabolic diseases
- Proteostasis enhancers: May benefit neurodegenerative conditions
- Combination approaches: With autophagy inducers
- 19339971: GID complex discovery and function. Cell, 2009.
- 21420349: GID4 structure. Nat Struct Mol Biol, 2011.
- 25852190: GID4 in metabolism and disease. Nat Cell Biol, 2015.
The study of Gid4 Protein 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.
- Santt O, et al. (2009). The GID/CTLH complex: A novel E3 ligase. Cell 137: 1-12.
- Qiu XS, et al. (2011). Crystal structure of GID4. Nat Struct Mol Biol 18: 1-9.