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Proteins with more than one polypeptide chain have what structure?
Wiki User
∙ 12y ago
These have quaternary structure. This is the overall shape of all the chains combined. The 3D shape of one polypeptide chain is the tertiary structure.
Wiki User
∙ 12y ago
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How can you distinguish between primary secondary tertiary and quaternary structures of proteins and can you give an example of each?
Primary structure of proteins refers to the exact sequence of the amino acids in the polypeptide chain. Secondary structure refers to the shape acquired by the backbone of the polypeptide chain when hydrogen bonds form between the carboxylic group of one amino acid and the amide group of another amino acid. there are two shapes in secondary structured proteins: Alpha Helix and Beta-pleated sheet tertiary structure refers to the shape taken up by the polypeptide chain as a result of bonds formed between the R-groups of the amino acids. three types of bonding may exist: Hydrgen bond, ionic bond and /or disulphide bonds.
What is the difference between polypeptide and protein?
First, it is important to know that all proteins are technically polypeptides, although in general scientists consider polypeptides molecules consisting of one strand of amino acids chemically bound to one another that have no special or unique properties. It would be very difficult or impossible to find a degreed and professional scientist who considers all polypeptides proteins. One difference between what is called a "polypeptide" and a "protein" is based on the number of amino acids each one contains. A chain of amino acids that contains relatively few amino acids compared to known proteins is a "polypeptide." The second most important distinction between how the two words are used is that scientists normally reserve the word "protein" for molecules consisting entirely or nearly entirely of amino acids that exhibit specialized physical or chemical properties, or both. For example, hemoglobin is considered a "protein" because it is specialized to carry the oxygen in our red blood cells. Keratin is another protein that serves as a structural material in our skin and is the material of which hair is made. On the other hand aspartame, the artificial sweetener, is a polypeptide since it only consists of three amino acids chemically bound to one another, thus it is too small to be called a protein. I can see how one might argue that it is a protein because it has a powerful sweet taste, however there are several other chemical compounds that are not sugars that also have a powerful sweet taste. (What would otherwise be the carboxylic acid end of aspartame has been changed to its methyl ester.)
What are the names for the monomers and polymers of nucleic acids?
monomer = amino acidpolymer = polypeptide (= polypeptide chain)A monomer is one unit in a chain of repeating units. Amino acids are assembled in cells into chains called polypeptides.A protein may consist of just one polypeptide, or more than one. For example, human growth hormone has only one chain, but hemoglobin has four.
How are polypeptides related to protein?
Cells create proteins by linking amino acids together into a chain called aPolypeptide. Each link is created by a dehydration reaction between the amino group of one amino acid and the carboxyl group of the next amino acid in the chain. Proteins are composed of one of more polypeptide chains. Your body can make an enormous variety of proteins by arranging different amino acids in different orders
What type of molecule is a protein molecule?
The type of molecule that a protein is is a polymer. To be more specific, protein is a polypeptide. Polymers are molecules that consist of repeating subunits. For example, a chain is a polymer of links, and can be considered a "poly-link". Similarly, proteins are repeating chains of peptide subunits, which are in turn made of amino acids.
Quaternary structure of proteins?
The quaternary structure is the overall structure of an enzyme complex. This is made of at least two separate polypeptide chains. The 3D structure of one polypeptide is known as the tertiary structure.
What is a difference in the structure of proteins and polysaccharides?
Polysaccharides are essentially many carbon sugar "rings" linked together. They are carbohydrates, and our bodies break them down into monosaccharides (single "rings") to gain energy. To provide energy is their main function. In contrast, a peptide bond is formed between two amino acids via dehydration synthesis. Amino acids are the monomers for proteins within the body, who function in part to catalyze reactions and carry out other directions of DNA. Many peptide bonded amino acids = a polypeptide. The most basic difference would be that polypeptides are proteins, where as polysaccharides are carbohydrates.
How can you distinguish between primary secondary tertiary and quaternary structures of proteins and can you give an example of each?
Primary structure of proteins refers to the exact sequence of the amino acids in the polypeptide chain. Secondary structure refers to the shape acquired by the backbone of the polypeptide chain when hydrogen bonds form between the carboxylic group of one amino acid and the amide group of another amino acid. there are two shapes in secondary structured proteins: Alpha Helix and Beta-pleated sheet tertiary structure refers to the shape taken up by the polypeptide chain as a result of bonds formed between the R-groups of the amino acids. three types of bonding may exist: Hydrgen bond, ionic bond and /or disulphide bonds.
If a protein contains three polypeptide chains that are held together by bonding forces what kind of structure does the protein have?
The protein has a quaternary structure.In addition, each polypeptide chain has a primary, secondary, and tertiary structure.The primary structure is the sequence of amino acids in a chain.The secondary structure is the next higher level of arrangement of a chain in space, for example coiling into a alpha-helix, shaping into a beta-pleated sheet, or forming into a turn or loop.Tertiary structure is a yet higher-level folding of the chain into its final three-dimensional shape.Some proteins have only one chain, but if there are two or more, the combination of these chains to form the functional protein is the quaternary structure.
What do you call a chain of 25 amino acids?
a chain of 25 amino acids can be called a peptide chain ---------------------------------------------------------------------------------- Two or united amino acids form a *dipeptide* Three a *tripeptide* Ten or more a *polypeptide* More than 50 *protine* Therefore a chain of 25 amino acids is a polypeptide :D
How do you predict the 3-D structure of a protein with respect to bio-informatics?
There are three main protein structures. Primary, secondary, and tertiary.Primary Structure:- This structure consists of a linear, unbranched polypeptide strand. This structure is established by covalent bondingSecondary Structure:- There are two different types of secondary structures of proteins; α-helix and β-pleated. This type of protein structure is maintained by hydrogen bonding. An example of a α-helix is DNA.Tertiary Structure:- This is structure is maintained by Hydrogen bonding, disulfide linkages and van der Waals forces. It usually consists of two or more polypeptide chains. An example is the K+/Na+ pumps found on the surface of the plasma membrane.And, for proteins constituted by more than one polypeptidic chain, there's also a Quaternary Structure, which results from the association among the chains. As examples, insulin and hemoglobin are proteins with quaternary structure.
What is a tertiary protein structure exemplified by?
Hemoglobin - formed with alpha helices and/or beta sheets, but as one, contiguous polypeptide. Superoxide dismutase would be a good example of a quaternary structure protein, since it is made of more than one polypeptide chain.
What is polypeptide chains?
Chains of amino acids are referred to as polypeptides. Proteins are created from one or more of these polypeptide molecules.
What must be done to a polypeptide chain to make it a functioning protein?
A protein becomes functional only when it folds itself into a three dimensional form or tertiary structure. More information - All amino acids have the same basic structure - an amino group, a carboxyl group and a hydrogen atom but they differ due to the presence of the side chain. The sequence of amino acids in a protein determines it's primary structure
What molecules makes up the structure proteins?
Proteins are biochemical compounds consisting of one or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function. A polypeptide is a single linear polymer chain of amino acids bonded together by peptide bonds between the carboxyl and amino groups of adjacent amino acid residues.
Do proteins consist of one or more polypeptide chains?
Think they do consist
Which of the amino acids would whne incorporated into polypeptide chain make the charge of the polypeptide more positive?
Arginine
