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Is hemoglobin a protein that exhibits the quaternary structure of protein folding?
Wiki User
∙ 13y ago
The tertiary structure is the folding
Wiki User
∙ 13y ago
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What is proteins subuit?
Proteins are produced as polymer of amino acid chains. They gain secondary structure elements such as alpha helix, beta sheet during folding and for their three dimensional structure. Some proteins such as Hemoglobin make quaternary structure where they form the final structure with four different subunits of two different proteins interacting each other.
Hemoglobin structure is tertiary or quaternary?
Hemoglobin is made up of four "monomeric subunits" each of which is known as a polypeptide and about the size of many normal individual proteins. Each of these subunits has its own tertiary structure and is about the size of another similar globular protein called Myoglobin. Quarternary structures ONLY exist in proteins with subunits, which are essentially four protein "parts" that are joined together (in this case with Hydrophobic and Ionic interactions) once they are already folded (tertiary structure). 4+ structure is how they fit together. So Myoglobin, with only one subunit does not have a quarternary structure, but does have primary, secondary and tertiary. Insulin, for example has two subunits and it too will have a quarternary structure, or how both subunits fit together
What is the tertiary structure for a protein?
'The Quaternary structure of a protein is the 4th level of folding for a protein. An example of this would be a red blood cell, which is a quaternary structure, it is made up of alpha helicies and also beta pleated in the tertiary structure. The Quaternary structure of a protein contains 4 tertiary structures in it.
What differences do hemoglobin and hair proteins have?
They have different structure types. Hemoglobin is a globular protein, where it has a globular shape from the folding of amino acids by the hydrophobic effect. alpha-Keratin (the protein in hair), on the other hand, has a helical structure, with a repeating pattern of amino acids. Hemoglobin does not have a continuous repeating pattern of amino acids.
What is the level of protein structure that describes all aspects of the three-dimensional folding of a polypeptide?
Primary: Simple string of amino acids called a polypeptide. Secondary: The varied hydrogen bonding of the side chains resulting in alpha helixes and beta sheets. Tertirary: The R group bondingd; hydophobic, hydrophilic, hydrogen bonding and disulfide bonding, which results in the globular, actual protein. Quarternary: The construction of multi protein subunits from tertiary structure. Such as hemeglobin.
Does oxytocin have a secondary structure or tertiary protein structure?
Yes it does. It also commonly contains quaternary structure.Secondary structure refers to folding and bonding interactions between atoms of the polypeptide backbone, either forming alpha-helices or Beta-sheets. Oxytocin contains both of these secondary structures as well as Beta-turns. Beta-sheets come in anti-parallel and parallel versions. Parallel means that the direction of the associated chains run in the same direction; N-terminus to C-terminus. Anti-parallel means that one or more of the associated chains run in an opposite direction to the others.Tertiary structure refers to interactions between side chains of the polypeptide residues. a good example of this is the disulfide bonds liking two cysteine residues which does occur in Oxytocin.Quaternary structure refers to association of separate polypeptide chains. Oxytocin can be found as a single chain in which case there is no quaternary structure. It is not uncommon however to find it as a pentamer, tetramer, or dimer. Conditions play a major factor in effecting its quaternary structure. whether it is in aqueous solution, biological conditions (cells), or crystallized. Another good example of quaternary structure is Hemoglobin. Hemoglobin is a dimer of dimers. 2 alpha-globin chains and 2 beta-globin chains.
Are there proteins that don't have a tertiary structure?
Yes. The primary structure is the basic sequence of amino acids in the strand. If a protein doesn't have a primary structure, then it doesn't have amino acids. If it doesn't have amino acids, the building blocks of a protein, then there is no protein to speak of.
What is the four levels of proteins?
Proteins have primary structure, which is their amino acid sequence, secondary structure, which is either the alpha helix or the beta pleated sheet, tertiary structure, the protein's geometric shape, and quaternary structure, the arrangement of multiple protein subunits.
What are the four stages of protein structures?
The four levels of protein structure are differentiated from each other by the complexity of their polypeptide chain. Proteins are constructed from 20 amino acids. The levels are the hydrogen atom, a Carboxyl group, an amino group and a variable or "R" group. They have a primary structure, the order in which the amino acids are linked to form a protein. Secondary structure , coiling and folding of the polypeptide chain. Tertiary structure, is a 3-D structure of a protein chain. Quaternary is the structure of a protein macro molecule formed by interactions between several polypeptide chains..
Hemoglobin represents which level of protein organization?
Haemoglobin has a protein structure upto quarternary structure since it is a dimer made up of two monomeric units, each of which are two in number. Thus the overall structure has 4 monomeric units.
What structure of a protein is the coiling or folding of a polypeptide chain?
Secondary structure. The coiling is the formation of the alpha helix. The folding is the formation of the beta sheets.
What are the different levels of protein folding?
Tertiary - the protein's natural three- dimensional conformation - and Quaternary - how separately related tertiary forms coalesce.
