Large-scale screen reveals how numerous signaling pathways intersect at the cell's primary protein-processing center
Wednesday, April 24, 2013 - 06:20
in Biology & Nature
Many proteins undergo extensive modification after being synthesized, particularly those that are secreted or embedded in the cell membrane. This is achieved within the Golgi apparatus (see image), a cellular organelle consisting of multiple membrane-bound compartments known as cisternae. Each of these contains specific sets of protein-modifying enzymes, which sequentially modify their targets. For example, many proteins undergo glycosylation, which entails the stepwise addition of complex sugar molecules.