MCB 2050 Lecture Notes - Lecture 14: Endomembrane System, Dynamic Structures, Cell Membrane
Document Summary
Endomembrane system = main difference between prokaryotes and eukaryotes. Endomembrane system dynamic, coordinated network of all the cell"s organelles and related structures (except peroxisomes, mitochondria and chloroplasts: endoplasmic reticulum (er, golgi, endosomes, lysosomes/vesicles, secretory granules, plasma membrane. Large amounts of material are exchanged between each organelle/structure via small, membrane-bound transport vesicles. Each organelle is structurally and functionally distinct: contains a particular set of proteins, performs a unique set of activities, provides compartmentalisation and functional diversity, conserved in eukaryotes, dynamic structures. Several pathways exist in endomembrane system all rely on transport vesicles. Biosynthetic pathway materials are transported from the er to the golgi, to endosomes, and then to either lysosomes (referred to as vacuoles in plants and fungi) or, in some instances, to the plasma membrane (pm) Secretory pathway (two types): constitutive secretion, er-derived materials are continually transported from the golgi to the pm and/or.