Protein Transport

PROTEIN TRANSPORT:

CELL COMPONENTS INVOLVED IN PROCESS:

Endoplasmic reticulum:

• Spreads through the whole cytoplasm
• 3d network of cavities, sac like and tubular, bounded by membrane
• Links with the membrane around nucleus and makes up part of the transport system.
• Divided in two parts 

 Rough endoplasmic reticulum;

·         Covered in ribosomes(make the proteins)

·         RER isolates and transports these proteins once made

·         Large surface area for the synthesis of proteins, stores and transports

·         Some proteins are not used inside the cell where they are made, so they are secreted out by exocytosis

Smooth endoplasmic reticulum;

·         Synthesis and transport of steroids and lipids

Golgi body:

Stacks of parallel flattened membrane pockets called cisternae formed by vesicles from the ER fused together

· Proteins are brought to the Golgi body in vesicles pinched off from the RER…