Transport protein
Transport Protein
A Transport Protein (pronounced: trans-port pro-teen) is a type of Protein that moves other materials within an Organism. They function as a system that moves other molecules across the Cell Membrane, often against a concentration gradient.
Etymology
The term "Transport Protein" is derived from the Latin word "transportare", meaning "to carry across", and the Greek word "proteios", meaning "primary" or "in the lead".
Types of Transport Proteins
There are several types of transport proteins, including:
- Channel Proteins: These proteins form a channel that allows specific molecules to flow through.
- Carrier Proteins: These proteins bind to a specific molecule to facilitate its passage across the cell membrane.
- ATP-powered Pumps: These proteins use the energy from ATP hydrolysis to transport molecules.
Related Terms
- Active Transport: The movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
- Passive Transport: The movement of ions or molecules across a cell membrane from a region of higher concentration to a region of lower concentration, not requiring energy.
- Facilitated Diffusion: The process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins.
See Also
External links
- Medical encyclopedia article on Transport protein
- Wikipedia's article - Transport protein
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