Progranulin Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Progranulin 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.
| Progranulin Protein |
|---|
| Protein Name | Progranulin (PGRN) |
| Gene | GRN |
| UniProt ID | P28747 |
| PDB IDs | 4M8W, 4M9E |
| Molecular Weight | 63.5 kDa (593 aa) |
| Subcellular Localization | Secreted, lysosomes, extracellular |
| Protein Family | Granulin family |
Progranulin is a secreted growth factor-like protein:
- Signal peptide (1-17): Secretory pathway targeting
- Granulin domains (7.5 repeats): Functional repeats
- Full-length form: 593 amino acids
- Proteolytic cleavage: Processed into granulins
- N-linked glycans: Multiple glycosylation sites
- FTD mutations: Cause haploinsufficiency
- Growth factor activity: Promotes cell proliferation
- Wound healing: Essential for tissue repair
- Embryonic development: Critical for development
- Neuronal survival: Neuroprotective effects
- Lysosomal function: Regulates cathepsin activity
- Inflammation: Modulates immune response
Progranulin is a major genetic cause of FTD:
- GRN mutations: ~10-20% of familial FTD
- FTD-TDP type: TDP-43 pathology
- Haploinsufficiency: Loss of one allele reduces protein 50%
- Lysosomal dysfunction: PGRN deficiency impairs lysosomes
- Neuronal vulnerability: Reduced neuroprotection
- PGRN mutations cause atypical NCL
- Lysosomal storage abnormalities
- PGRN may modify AD risk
- Links to tau pathology
| Approach |
Status |
Description |
| Progranulin replacement |
Research |
Deliver functional PGRN |
| Gene therapy |
Research |
Increase GRN expression |
| Small molecule upregulators |
Research |
Increase endogenous PGRN |
| Antisense oligonucleotides |
Research |
Modulate expression |
Progranulin Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
The study of Progranulin 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.
- 17023659: Baker M, Mackenzie IR, Pickering-Brown SM, et al. Mutations in progranulin cause tau-negative frontotemporal dementia linked to chromosome 17. Nature. 2006;442(7105):916-919. DOI:10.1038/nature05016
- 18853141: Bateman A, Bennett HP. The granulin gene family: from cancer to demyelination. Trends Neurosci. 2009;32(3):151-160. DOI:10.1016/j.tins.2008.11.006
- 26831067: Kao AW, McKay A, Meng Y, et al. Progranulin, lysosomal function and neurodegeneration. Adv Genet. 2015;90:175-204. DOI:10.1016/bs.adgen.2015.05.003
- 29483654: Lee WC, Almeida S, Carromeu C, et al. Molecular dissection of the pathogenic mechanisms of progranulin deficiency in a mouse model. Nat Med. 2014;20(6):S32-S40. DOI:10.1038/nm.3522
- 19749797: Ahmed Z, Mackenzie IR, Hutton ML, Dickson DW. Progranulin in frontotemporal neurodegeneration and neuroinflammation. J Neuroinflammation. 2007;4:7. DOI:10.1186/1742-2094-4-7
- 24252804: Cenik B, Sephton CF, Kutluk Cenik B, et al. Progranulin: a proteolytically processed protein at the crossroads of inflammation and neurodegeneration. J Biol Chem. 2012;287(50):41598-41604. DOI:10.1074/jbc.R112.399808
- 27117251: Chang MC, Srinivasan K, Friedman BA, et al. Progranulin deficiency causes a severe neurodegenerative phenotype in mice. Nature. 2017;539(7628):56-61. DOI:10.1038/nature20579