Biochemistry 3381A Study Guide - Quiz Guide: Phagosome, Endosome, Cell Membrane
27 May 2020
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Document Summary
Special type of phospholipids with sugar head. Hydroxyl group on sugar head can be phosphorylated, which one of the 6 oh groups is phosphorylated tells the cell the direction of transport. Different proteins have domains that bind highly specific to pips of organelles. Process by which cell takes up plasma membrane components, fluids, solutes, macromolecules and particles. Regulates composition of its plasma membrane in response to changing extracellular conditions invagination and then pinches off to form an endocytic vesicle: phagocytosis: Pseudopod extension and phagosome formation are driven by actin polymerization and reorganization. Polymerization and reorganization responds to the accumulation of a specific pip in the membrane of the forming phagosome that promotes actin polymerization and pseudopod formation. Action of kinase dephosphorylates pip and depolymerizes actin filaments at the base thereby promoting formation of phagosome: pinocytosis cell drinking continuous ingestion of portions of the plasma membrane molecules bind to specific receptors clathrin coated, endosome maturation.
