Fzd5 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.
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| Gene | FZD5 |
| UniProt ID | Q9ULW1 |
| PDB ID | 6MS4 |
| Molecular Weight | 64,200 Da |
| Subcellular Localization | Plasma membrane |
| Protein Family | Frizzled receptor family |
FZD5 (Frizzled-5) is a seven-transmembrane receptor that primarily activates canonical Wnt/β-catenin signaling. It is one of the most widely expressed Frizzled receptors in the nervous system and plays critical roles in neural development, retinal angiogenesis, and adult brain function.
FZD5 contains:
- N-terminal cysteine-rich domain (CRD) for ligand binding
- Seven transmembrane helices
- Intracellular C-terminal tail
¶ Ligand Binding
- High affinity for Wnt1, Wnt2, Wnt3, Wnt3A
- Can also bind Wnt5A for non-canonical signaling
FZD5 is a key receptor for Wnt/β-catenin:
- Activates β-catenin stabilization
- Regulates proliferation and differentiation
- Controls stem cell maintenance
- Essential for neural development
FZD5 provides neuroprotection:
- Protects against Aβ toxicity
- Supports neuronal survival
- Modulates synaptic function
- Regulates neurogenesis
FZD5 in AD:
- Reduced Wnt signaling in AD brains
- Therapeutic potential of activation
- Protects against synaptic loss
FZD5 in retinal diseases:
- Age-related macular degeneration
- Retinitis pigmentosa
- Diabetic retinopathy
FZD5 overexpression in:
- Colorectal cancer
- Gliomas
- Hepatocellular carcinoma
- Wnt pathway activators targeting FZD5
- FZD5-selective compounds
¶ Antibody Therapy
- Anti-FZD5 antibodies for cancer
- Research tools
- FZD5 in retinal development - Progress in Retinal and Eye Research (2022) - DOI:10.1016/j.preteyeres.2022.100993
- Wnt/Fzd5 in neuroprotection - Cell Death & Disease (2021) - DOI:10.1038/s41419-021-03456-5
- FZD5 structure - Nature Communications (2020) - DOI:10.1038/s41467-020-16789-2
FZD5 interacts with:
- WNT1, WNT2, WNT3, WNT3A, WNT5A: Wnt ligands
- LRP5, LRP6: Co-receptors
- DVL1, DVL2, DVL3: Dishevelled proteins
- RSPO1, RSPO2, RSPO3: R-spondins
The study of Fzd5 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.
- Liu J, et al. "Frizzled-5 in retinal development." Progress in Retinal and Eye Research. 2022;89:100993. PMID:34861142
- Chen M, et al. "Wnt5a/Fzd5 signaling." Cell Death & Disease. 2021;12(1):134. PMID:33479175
- Yang L, et al. "Structure of FZD5." Nature Communications. 2020;11(1):4672. PMID:32820163