The Mitochondrial HSP90 Paralog TRAP1: Structural Dynamics, Interactome, Role in Metabolic Regulation, and Inhibitors

Area of Science:

• Mitochondrial biology
• Molecular chaperones
• Heat shock proteins

Background:

• TRAP1 (heat shock protein 90 paralog) function is elusive, complicated by its dispensable nature in vitro and in vivo.
• TRAP1 shows higher homology to bacterial HtpG than eukaryotic HSP90, suggesting unique regulatory mechanisms.
• Its unique structure likely governs temperature-sensitive ATPase activity in high-temperature environments.

Purpose of the Study:

• To review current knowledge on TRAP1, a unique mitochondrial molecular chaperone.
• To highlight the importance of understanding TRAP1's structure, function, and regulation.
• To elucidate TRAP1's role in mitochondrial homeostasis and disease.

Main Methods:

• Literature review summarizing existing research on TRAP1.
• Analysis of TRAP1's structural features and homology to other HSP90 proteins.
• Examination of TRAP1's physiological roles and disease associations.

Main Results:

• TRAP1 regulates mitochondrial respiration, balancing oxidative phosphorylation and glycolysis.
• It promotes mitochondrial homeostasis and exhibits cytoprotective activity.
• TRAP1 dysfunction is linked to neurodegenerative diseases, while its overexpression is found in cancers.

Conclusions:

• Understanding TRAP1's unique mechanisms is key to advancing mitochondrial biology.
• TRAP1's role in cellular metabolism and disease pathogenesis warrants further investigation.
• Targeting TRAP1 may offer therapeutic strategies for cancer and neurodegenerative disorders.