Farnesylierung

Farnesylierung is a post-translational modification of proteins. It involves the covalent attachment of a farnesyl group, a 15-carbon isoprenoid lipid, to a cysteine residue near the C-terminus of a target protein. This process is catalyzed by the enzyme farnesyltransferase. Farnesylierung is a type of prenylation, a broader class of lipid modifications. Proteins that undergo farnesylierung are typically found associated with cellular membranes, and the lipid modification is believed to aid in their anchoring to these membranes. This membrane association is crucial for the proper function and localization of many farnesylated proteins, particularly those involved in signal transduction pathways. Examples of farnesylated proteins include Ras proteins, which are involved in cell growth and differentiation, and lamins, which are structural components of the nuclear envelope. Dysregulation of farnesylierung has been implicated in various diseases, including cancer, making it a target for therapeutic intervention. Inhibitors of farnesyltransferase are being investigated as potential anticancer drugs. The precise role of farnesylierung can vary depending on the specific protein, but it generally influences protein localization, stability, and interaction with other cellular components.