Therapeutic intervention based on protein prenylation and associated modifications
Michael H Gelb1, Lucas Brunsveld, Christine A Hrycyna
1Department of Chemistry, University of Washington, Seattle, Washington 98195, USA. gelb@chem.washington.edu
Nature Chemical Biology
|September 20, 2006
Summary
Protein prenylation attaches lipid groups to proteins, aiding membrane anchoring and interactions. Blocking this process shows therapeutic potential for cancers, parasitic infections, and progeria.
Area of Science:
- Molecular and Cellular Biology
- Biochemistry
- Cellular Membrane Dynamics
Background:
- Eukaryotic proteins undergo C-terminal lipid modifications, including farnesylation and geranylgeranylation.
- These prenylation modifications serve as membrane anchors and facilitate protein-protein interactions.
- Further modifications like proteolysis, methylation, and palmitoylation enhance membrane association and alter protein trafficking.
Purpose of the Study:
- To elucidate the role of protein prenylation in cellular functions.
- To explore the therapeutic implications of inhibiting the protein prenylation pathway.
Main Methods:
- Isolation and characterization of enzymes involved in the protein prenylation pathway.
- Investigating the effects of blocking protein prenylation on cellular processes.
Main Results:
- Identified and characterized key enzymes within the protein prenylation pathway.
- Demonstrated that blocking protein prenylation impacts protein membrane association and dynamics.
- Observed therapeutic efficacy of prenylation inhibition in preclinical models.
Conclusions:
- Protein prenylation is a critical post-translational modification regulating protein localization and function.
- Targeting the protein prenylation pathway offers a promising therapeutic strategy.
- Inhibition of protein prenylation is effective against cancers, parasitic infections, and Hutchinson-Gilford progeria syndrome.
Related Concept Videos
Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Phosphorylation
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Protein Modifications in the RER
Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
Tagging and Fusion Proteins
Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...
Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...

