Peptidyl-prolyl isomerase inhibitors

Area of Science:

• Biochemistry
• Medicinal Chemistry
• Molecular Biology

Background:

• Peptidyl-prolyl isomerases (PPIases) are crucial enzymes involved in protein folding.
• Key PPIases include Pin1, cyclophilins (CyP), and FK506 binding proteins (FKBP).
• Inhibitors of these enzymes have therapeutic potential but require tailored design strategies.

Purpose of the Study:

• To review the design, structure, and biological activity of PPIase inhibitors.
• To highlight the developmental status of inhibitors for Pin1, CyP, and FKBP.
• To compare design approaches for different PPIase targets.

Main Methods:

• Literature review of published studies on PPIase inhibitors.
• Analysis of inhibitor design strategies, focusing on structural analogues.
• Evaluation of biological activity data for characterized inhibitors.

Main Results:

• Cyclophilin and FKBP inhibitors have been extensively studied with various design approaches.
• Pin1 inhibitors are a nascent field, with initial designs focusing on ground-state analogues like alkenes and bicyclic compounds.
• FKBP inhibitor design has explored analogues of the prolyl amide bond, inspired by transition-state mimicry.

Conclusions:

• Significant progress has been made in developing inhibitors for CyP and FKBP.
• The development of Pin1 inhibitors is in its early stages, offering opportunities for novel drug discovery.
• Understanding PPIase structure and mechanism is key to designing effective inhibitors.