How is structure related to function in protein?
The amino acid sequence of a protein which is referred to as its primary structure determines the structure or folding pattern of that protein. It is the structure of the protein that determines which molecules that protein can interact with. Proteins will interact with a wide range of molecules based on compatible binding surfaces to carry out different functions. It would stand to reason that if proteins have similar binding surfaces they are more likely to interact with similar molecules and ultimately carry out similar functions. eg all alcohol dehydrogenases will break down different types of alcohols. This however is not always the case because there is a limited number of different basic folding patterns that proteins can have. And there are many examples of proteins with similar structures but totally unrelated functions. In these instances the differences in function are because single amino acids in the binding surfaces determine the chemical reactions that the proteins can t
