Transport vesicles

Definition

Transport vesicles are membrane-bound sacs that shuttle proteins and other molecules between different compartments within eukaryotic cells. They play a critical role in intracellular transport and communication.

5 Must Know Facts For Your Next Test

1. Transport vesicles are formed by the budding off of membranes from the endoplasmic reticulum or Golgi apparatus.
2. They are essential for the transport of proteins, lipids, and other molecules to their correct destinations within the cell.
3. The movement of transport vesicles is facilitated by motor proteins along cytoskeletal tracks, such as microtubules and actin filaments.
4. Vesicle fusion with target membranes involves specific SNARE proteins that ensure cargo delivery to the right location.
5. Malfunctions in transport vesicle mechanisms can lead to various diseases, including neurodegenerative disorders.

Review Questions

Related terms

Endoplasmic Reticulum:

A network of membranous tubules involved in protein and lipid synthesis.

Golgi Apparatus:

An organelle responsible for modifying, sorting, and packaging proteins and lipids for secretion or delivery to other organelles.

SNARE Proteins:

Proteins that mediate the fusion of transport vesicles with their target membranes.