Coat protein

Coat protein may refer to:
 * Viral coat protein, a component of the capsid
 * Variable surface glycoproteins or procyclins, surface coat proteins of either the bloodstream form or the procyclic form of the parasite Trypanosoma brucei
 * COPI, a type of vesicle coat protein that transports proteins from the cis end of the Golgi complex back to the rough endoplasmic reticulum
 * COPII, a type of vesicle coat protein that transports proteins from the rough endoplasmic reticulum to the Golgi apparatus