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l�ll Formation of functional cell membrane domains: the interplay of lipid- and protein-mediated interactions Harder TPhilos Trans R Soc Lond B Biol Sci 2003[May]; 358 (1433): 863-8Numerous cell membrane associated processes, including signal transduction, membrane sorting, protein processing and virus trafficking take place in membrane subdomains. Protein-protein interactions provide the frameworks necessary to generate biologically functional membrane domains. For example, coat proteins define membrane areas destined for sorting processes, viral proteins self-assemble to generate a budding virus, and adapter molecules organize multimolecular signalling assemblies, which catalyse downstream reactions. The concept of raft lipid-based membrane domains provides a different principle for compartmentalization and segregation of membrane constituents. Accordingly, rafts are defined by the physical properties of the lipid bilayer and function by selective partitioning of membrane lipids and proteins into membrane domains of specific phase behaviour and lipid packing. Here, I will discuss the interplay of these independent principles of protein scaffolds and raft lipid microdomains leading to the generation of biologically functional membrane domains.|Animals[MESH]|Cell Compartmentation/*physiology[MESH]|Glycolipids/*physiology[MESH]|Humans[MESH]|Intracellular Membranes/*physiology[MESH]|Membrane Microdomains/*physiology[MESH]|Membrane Proteins/*physiology[MESH] |