what is the function of structural motif?
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Structural motifs are short segments of protein 3D structure, which are spatially close but not necessarily adjacent in the sequence. Structural motifs may be conserved in a large number of different proteins (10). Their role may be structural or functional.
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The main role of DNA in the cell is the long-term storage of information. ... The major function of DNA is to encode the sequence of amino acid residues in proteins, using the genetic code. To read the genetic code, cells make a copy of a stretch of DNA in the nucleic acid RNA.
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Therefore the amino acid sequence determines the conformation of the protein and this in turn determines the function of the protein. It is important to remember that protein shape is sensitive to pH, temperature and dissolved salts.
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An example of a student response may be: “DNA sequence provides the code for the amino acid sequence. The amino acid sequence determines the structure of the protein, which affects the function of the protein.”
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Primary structure of a protein is the linear sequence of amino acids, the secondary structure of a protein is the folding of the peptide chain into an α-helix or β-sheet while the tertiary structure is the three-dimensional structure of a protein.
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To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies. Each DNA sequence that contains instructions to make a protein is known as a gene.
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Proteins have a variety of function in cells. Major functions include acting as enzymes, receptors, transport molecules, regulatory proteins for gene expression, and so on. Enzymes are biological catalysts that speed up a chemical reaction without being permanently altered.
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The Active Site An enzyme has a three-dimensional shape, so -- not surprisingly -- its active site also has a 3D shape. Each enzyme only binds certain substrates because each substrate molecule has a certain shape. Each active site has certain amino acids that play key roles in manipulating a substrate.
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The nucleotide sequences that make up DNA are a “code” for the cell to make hundreds of different types of proteins; it is these proteins that function to control and regulate cell growth, division, communication with other cells and most other cellular functions.
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The precise shape of a molecule is usually very important to its function in the living cell. Molecular shape is crucial in biology because it determines how biological molecules recognize and respond to one another with specificity.
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Structural genes refer to a gene that codes for any RNA or protein product other than a regulatory factor, while regulatory genes refer to a gene involved in controlling the expression of one or more other genes. Thus, this is the main difference between structural and regulatory genes.
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DNA must perform three functions: Function: Function: Function: Storing information Copying information Transmitting genetic information Why this function is Why this function is Why this function is important: important: important: Its important because Its important because It is important to send you have to back ...
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A Lewis structure is a graphic representation of the electron distribution around atoms. The reason for learning to draw Lewis structures is to predict the number and type of bonds that may be formed around an atom. A Lewis structure also helps to make a prediction about the geometry of a molecule.
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Structure refers to something's form, makeup or arrangement. Function refers to something's job, role, task, or responsibility. Determine means to cause, direct, govern.
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What is the difference between a structural gene and a regulator gene? a. Structural genes are transcribed into mRNA, but regulator genes are not. ... Structural genes encode proteins that function in the structure of the cell; regulator genes carry out metabolic reactions.
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The relationship between the primary and tertiary structure of a protein is the both have a sequence of amino acids in a polypeptide chain. The sequence of amino acids in a primary structure determines its three-dimensional shape.
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The most common are the alpha (α)-helix and beta (β)-pleated sheet structures. Both structures are held in shape by hydrogen bonds. ... The α-helix and β-pleated sheet structures are found in many globular and fibrous proteins. The unique three-dimensional structure of a polypeptide is known as its tertiary structure.