The structure of membrane proteins often determines their function. This, in turn, is the way we classify the type of membrane protein. In general, integral proteins are embedded within the hydrophobic layer of the membranes. Peripheral proteins are not embedded within the hydrophobic region of the membrane.
What are the three types of membrane proteins?
Peripheral membrane proteins, or extrinsic proteins, do not interact with the hydrophobic core of the phospholipid bilayer. Instead they are usually bound to the membrane indirectly by interactions with integral membrane proteins or directly by interactions with lipid polar head groups.
What are the three functions of proteins in a cell membrane?
Peripheral proteins can be found on either side of the lipid bilayer: inside the cell or outside the cell. Membrane proteins can function as enzymes to speed up chemical reactions, act as receptors for specific molecules, or transport materials across the cell membrane.