BIOL 2021 Chapter Notes - Chapter 13: Protein Kinase, Lipid-Anchored Protein, Amphiphile
Document Summary
Internal compartments that receive components that have been removed from the plasma membrane by endocytosis. Transport vesicles bud off form one membrane and fuse with another carrying cargo. Secretory pathways go from er to golgi and cell surface and lysosomes. Endocytic pathways go from plasma membrane to er. Retrieval pathways balance the flow of membrane bw compartments in opposite direction bringing membrane and selected proteins back to compartment of origin. There are various types of coated vesicles transport vesicles bud off as coated vesicles which have a distinctive cage of proteins covering their cytosolic surface. Before the vesicles fuse with the target membrane, they discard their coat bc the two cytosolic membrane surfaces must interact with each other directly and fuse. Concentrates specific membrane proteins in a specialized patch. Which then gives rise to the vesicle membrane. So it selects the appropriate membrane molecules for transport: outer coat.