Compare the Structure and Function of Collagen and Haemoglobin Essay

hemoglobin is a transport protein that carries group O from the lungs to the tissues and carries carbon dioxide from the tissues back to the lungs. In piece to mathematical pass near efficiently, hemoglobin ineluctably to bind to group O tightly when the oxygen concentration is high in the lungs and be able to release oxygen quick in the relatively low incomplete pressure in the tissues. I willing be comparing the social organisation and function of haemoglobin with the body grammatical construction and function of collagen, which is a structural protein. Collagens functions be quite an dissentent from those of world(a) proteins such as enzymes tough bundles of collagen called collagen fibers ar a major comp adeptnt of the extracellular matrix that supports most tissues and gives cells grammatical construction from the exposeside. Collagen is also present in certain cells as it has great flexible strength, and is the main component of fascia, cartilage, ligaments, tendons, bone and teeth. first Structure the number, type and sequence of amino group ditsThe primary level of structure in a protein is the linear sequence of amino acids, create by a compaction reaction. The primary structure of these proteins argon in truth different. The haemoglobin soupcon consists of quadruple polypeptide (globin) durance, where as collagen is made up of three polypeptide chains wound round apiece other. In Haemoglobin there are a wide range of amino acid constituents in the primary structure, in blood line 35% of collagens primary structure is glycine. This difference in primary structure causes the proteins themselves to be different due to the headmaster different primary structure the haemoglobin protein is soluble in water whereas the collagen protein is not. alternate winding structure Formed when the chain of amino acid coils or turn outs to pains an of import whorl or important pleated sheet.Haemoglobin is comprised of four polypeptide subunits, two with alpha helix secondary structure and two with beta pleated sheet form. All four components contain a heme group that stick out bind to oxygen, and all four components moldiness be present to form haemoglobin. The constellation of the haemaglobin affects its ability to carry oxygen, and travel freely throughout the circulatory system. Whereas Collagens secondary structure involves three strands of protein bonded together mingled with the chains with hydrogen bondsand then twist into a helix that is referred to as a collagen helix.Tertiary structure the last(a) three dimensional shape of protein is formed when these coils and pleats coil or fold. Due to interactions in the midst of R-groups of the different amino acids. The third structure or overall shape of collagen protein subunits is a helical chain. Due to the ways in which the amino acids are put the protein trick be hydrophobic or hydrophilic. oil-soluble proteins, like haemoglobin will fold with th e hydrophobic side on the inner and the hydrophilic side on the outside. As with all proteins the tertiary structure of each subunit is held in place by a number of bonds and interactions, these interation give the subunits and social unit molecule very specific shapes, this is wherefore haemoglobin and collagen differ so greatly in structure and in function as the shape of the molecule (due to the tertiary structure) is vital for the molecule to carry out its function.Quaternary structure some proteins are made up of more than one polypeptide subunit joined together. The quaternary structure of haemoglobin consists of four polypeptide subunits. Two are called alpha chains and two are called beta chains. The four subunits together form one haemoglobin molecule, which is water soluble. In comparison, The quaternary structure of collagen consists of three left helices twisted into a right-handed coil. ropy proteins, like collagen contain polypeptide chains arranged in long strand s or sheets, whereas globular proteins, like haemoglobin have polypeptide chains that are folded in a orbicular shape.Due to the differences in structure of collagen and haemoglobin their shape and function also differ greatly. The triple helix structure of collagen gives the structure strength and therefore the function of collagen is to lead mechanical strength in many a(prenominal) areas. Where as the presence of a prosthetic group, Haem, in the structure of haemoglobin bureau oxygen can bind to the iron. This factor that one complete haemoglobin molecule can bind up to four