Because of proteins are composed of amino acids, each of which have their own special properties.
So, the primary structure definitely dictates the function of a protein by the sequence of amino acids it has. The primary structure's sequence of amino acids also dictates how the polypeptide will form (its structure). The function of a protein is directly related to its structure. For example, a protein that fights a certain bacteria might have a shape that allows it to bind to the bacteria and then destroy it. Primary Structure of Proteins. The linear sequence of amino acids constitutes a protein's primary structure. The sequence is written from the amino-terminal end (the first amino acid) to the carboxyl-terminal end (the same sequence in which the protein is synthesized). There are four levels of protein structure: primary, secondary, tertiary, and quaternary. These levels also reflect their temporal sequence. Proteins are synthesized as a primary sequence and then fold into secondary → tertiary → and quaternary structures. The primary structure is simply a long chain of peptides (polypeptide chain). The peptide monomers are like letters in a long, long word (the polypeptide). The word, a product … of the primary structure and the peptide bonding sequence means something-whether it be, I'm a transport protein. or I'm an enzyme!. The function of a protein is directly related to its structure. For example, a protein that fights a certain bacteria might have a shape that allows it to bind to the bacteria and then destroy it. The quaternary structure of a protein is the spatial conformation caused by interactions between the polypeptide chains that form the protein. Only proteins made up of two or more polypeptide chains have a quaternary structure. Insulin (two chains), hemoglobin (four chains) and immunoglobulins (antibodies, four chains) are some examples of protein with a quaternary structure. Any changes in the structure of a protein are relevant if they alter its biological activity. Changes in the primary structure of a protein are the most important because they are modifications in the composition of the molecule, and that composition determines all the other structures of Each bead is a small molecule called an amino acid. There are 20 standard amino acids, each with its own shape, size, and properties. Proteins typically contain from 50 to 2,000 amino acids hooked end-to-end in many combinations. Each protein has its own sequence of amino acids. Proteins are made of amino acids hooked end-to-end like beads on a necklace. To become active, proteins must twist and fold into their final, or native, conformation.. This final shape enables proteins to accomplish their function in your body Protein structure prediction is the prediction of the three-dimensional structure of a protein from its amino acid sequence — that is, the prediction of its folding and its secondary, tertiary, and quaternary structure from its primary structure.  Proteins are composed of amino acids, each of which have their own  special properties. The non-polar amino acids would fold into the  interior of the protein during protei … n folding, because they are  hydrophobic. A protein consists of a primary structure, which  consists of the amino acid chain. The secondary structure is how  the amino acids join together into alpha helices and beta pleated  chains and form hydrogen bonds. The function of a protein is directly related to its structure. For example, a protein that fights a certain bacteria might have a shape that allows it to bind to the bacteria and then destroy it. All properties of a protein are derived from the primary structure, the linear sequence. Encoded in the sequence is the ability of the protein to fold into its secondary, tertiary, and quaternary structures, and thus to be able to carry out a function. There are four levels of protein structure: primary, secondary, tertiary, and quaternary. These levels also reflect their temporal sequence. Proteins are synthesized as a primary sequence and then fold into secondary → tertiary → and quaternary structures. The secondary structure of a protein is generated by the way in which its amino acids interact through the intermolecular bond. These interactions create a spatial conformation of the polypeptide chain. The two most studied secondary conformations of proteins are the alpha-helix and the beta-sheet. Any changes in the structure of a protein are relevant if they alter its biological activity. Changes in the primary structure of a protein are the most important because they are modifications in the composition of the molecule, and that composition determines all the other structures of the protein.
http://www.answers.com/Q/Why_do_proteins_have_great_potential_for_variation_of_structure_and_function http://www.biologyreference.com/Po-Re/Protein-Structure.html http://www.answers.com/Q/Why_do_proteins_have_great_potential_for_variation_of_structure_and_function http://www.biology-questions-and-answers.com/protein-structure.html http://publications.nigms.nih.gov/structlife/chapter1.html https://en.wikipedia.org/wiki/Protein_structure_prediction http://www.answers.com/Q/Why_do_proteins_have_great_potential_for_variation_of_structure_and_function http://www.biologyreference.com/Po-Re/Protein-Structure.html http://www.biology-questions-and-answers.com/protein-structure.html
why does a protein have a great potential for variation of structure