Part 1: Maintaining Proteostasis -- 1. Structural Allostery and Protein-Protein Interactions of Sin3 -- 2. Protein Posttranslational Modifications: Role in Protein Structure, Function and Stability -- 3. Protein Folding and Aggregation: A revisit of basic conception -- Part 2: Proteopathy: Failure of proteostasis -- 4. Protein Folding: From Normal Cellular Function to Pathophysiology -- 5. Protein Misfolding Diseases: In perspective of Gain and loss-of-function -- 6. Amyloid formation in Alzheimer's disease -- 7. Advances in modulation of Proteopathies, the devil spread from head to toe -- Part 3: Chaperone surveillance of proteopathy -- 8. Small Molecule Osmolytes can Modulate Proteostasis -- 9. Pharmacological Chaperones in Protein Aggregation Disorders.