Protein Families & Clusters
Overview <table class="infobox infobox-protein">
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Protein Families & Clusters
Overview <table class="infobox infobox-protein">
This page organizes neurodegenerative disease-related proteins into families and functional clusters, enabling analysis of target coverage, identification of redundant functions, and understanding of pathway relationships. Protein family analysis helps prioritize targets and predict off-target effects. [@protein2023]
Protein families arise from gene duplication and divergence, with members often sharing structural features and biochemical functions. In neurodegenerative diseases, multiple family members may be involved in pathogenesis, offering both therapeutic opportunities and challenges. [@amyloid2022]
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Amyloid and APP Family
Amyloid Precursor Protein Family
Significance The APP family is central to AD pathogenesis. APP is cleaved by BACE1 and [gamma-secretase](/entities/gamma-secretase) to produce [amyloid-beta](/proteins/amyloid-beta). APLP proteins have overlapping functions but do not produce amyloid-beta, suggesting functional redundancy that could be therapeutically exploited.
Tau Protein Family
MAPT Gene Family
Tauopathies Different tauopathies are characterized by different isoform ratios:
3R tauopathies : Pick's disease4R tauopathies : CBD, PSP, AGD3R+4R tauopathies: AD, chronic traumatic encephalopathy
Synuclein Family
Alpha-Synuclein Family
Therapeutic Implications Beta-synuclein may protect against alpha-synuclein aggregation, suggesting that enhancing beta-synuclein or blocking gamma-synuclein could be therapeutic strategies.
Apolipoprotein Family
APOE ε2 : Protective, associated with longevityAPOE ε3 : Most common, neutral riskAPOE ε4 : Major risk factor, ~40% of AD patientsGlutamate Receptor Families
Ionotropic Glutamate Receptors
Protein Kinase Families
Neurodegeneration-Relevant Kinases
Kinase Inhibitor Considerations Kinase inhibitors face challenges:
Broad specificity may cause off-target effects
Adaptive feedback mechanisms
[Blood-brain barrier](/entities/blood-brain-barrier) penetration
Protease Families
APP-Processing Proteases
Other Proteases
Protein Quality Control Families
Heat Shock Protein Families
Ubiquitin System
Therapeutic Target Clusters
Cluster 1: Protein Aggregation
Amyloid family
Tau family
Synuclein family
Cluster 2: Neuroinflammation
[Complement system](/entities/complement-system)
TLR signaling
Cytokine receptors
Cluster 3: Synaptic Function
Glutamate receptors
Synaptic proteins
Ion channels
Cluster 4: Cellular Quality Control
[Autophagy](/entities/autophagy) proteins
Ubiquitin system
[Heat shock proteins](/entities/heat-shock-proteins)
See Also
[Alzheimer's Disease](/diseases/alzheimers-disease)
[Parkinson's Disease](/diseases/parkinsons-disease)
External Links
[PubMed](https://pubmed.ncbi.nlm.nih.gov/)
[KEGG Pathways](https://www.genome.jp/kegg/pathway.html)
References
[Unknown, Protein Families in Neurodegeneration (2023) (2023)](https://doi.org/10.1016/j.tins.2023.05.001)
[Unknown, Amyloid Precursor Protein Family (2022) (2022)](https://doi.org/10.1007/s00401-022-02497-2)
[Unknown, Tau Protein Family in Tauopathies (2023) (2023)](https://doi.org/10.1007/s00401-023-01487-8)
[Unknown, APOE Family in Neurobiology (2023) (2023)](https://doi.org/10.1038/s41583-023-00677-3) Show full description