Tertiary structure of a protein will lead the polypeptide chains to get the following shapes

The tertiary structure of proteins represents overall folding of the polypeptide chains i.e., further folding of the secondary structure. It gives rise to two major molecular shapes viz. fibrous and globular. The main forces which stabilize the 2° and 3° structures of proteins are hydrogen bonds, disulphide linkages
Vander Waals and electrostatic forces of attraction.