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Rhomboid proteins: conserved membrane proteases with divergent biological functions
1Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA. surban@jhmi.edu
Genes & Development
|November 23, 2006
Summary
Rhomboid proteins are novel intramembrane proteases conserved across life. They regulate diverse cellular processes and are linked to human diseases, offering insights into molecular evolution.
Area of Science:
- Biochemistry
- Molecular Biology
- Evolutionary Biology
Background:
- Rhomboid proteins, initially found in Drosophila, are crucial for epidermal growth factor (EGF) receptor signaling.
- Uniquely conserved across all kingdoms of life, their broad significance remains largely unexplored.
- Recent structural and biochemical studies reveal rhomboid proteins function as intramembrane proteases.
Purpose of the Study:
- To elucidate the conserved function and evolutionary significance of rhomboid proteins.
- To explore the diverse biological roles of rhomboid proteins beyond their initial discovery.
- To investigate the link between rhomboid protein function and human diseases.
Main Methods:
- Biochemical reconstitution assays to determine enzymatic activity.
- High-resolution crystal structure determination of rhomboid proteins.
- Comparative analysis of rhomboid protein functions across different organisms and biological processes.
Main Results:
- Rhomboid proteins possess a unique serine protease-like catalytic mechanism within the membrane bilayer.
- They function in diverse processes including bacterial quorum sensing, mitochondrial fusion, apoptosis, and stem cell differentiation.
- Emerging evidence links rhomboid proteins to human diseases such as blindness, diabetes, and parasitic infections.
Conclusions:
- Rhomboid proteins are versatile intramembrane proteases with critical roles in cell signaling and regulation.
- Their conservation and diverse functions provide a model for studying molecular evolution of regulatory mechanisms.
- Further research into rhomboid proteins may yield insights into disease pathogenesis and therapeutic strategies.
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