Membrane transport protein

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A membrane transport protein (or simply transporter) is a membrane protein[1] involved in the movement of ions, small molecules, or macromolecules, such as another protein across a biological membrane. Transport proteins are integral transmembrane proteins; that is they exist permanently within and span the membrane across which they transport substances. The proteins may assist in the movement of substances by facilitated diffusion or active transport. These mechanisms of action are known as carrier-mediated transport.[2]

Types[edit]

(Grouped by Transporter Classification database categories)

1: Channels/pores[edit]

2: Electrochemical potential-driven transporters[edit]

3: Primary active transporters[edit]

4: Secondary active transporters[edit]

Symporters transport two or more ions together in the same direction, antiporters in the opposite direction. uniport transport one ion in only one direction.

5: Incompletely characterized transport systems[edit]

Ungrouped[edit]

See also[edit]

References[edit]

External links[edit]