which amino acids restrict alpha helical or beta pleated sheets formation, what are the properties that...
which amino acids restrict alpha helical or beta pleated sheets formation, what are the properties that they have that make them do so.
Homework Answers
Glycine and Proline amino acid restricts the alpha helix and beta pleated sheets formation because this these amino acids don't favour hydrogen bond formation.Glyvine has no side chain.it shows conformational flexibility that makes it entropically expensive to adopt the relatively constrained α-helical structure.
Proline has an unusual shape for an amino acid because its R-group folds back on itself to form a ring with the amino group of the backbone.
That changes the bonding angle of the polypeptide chain and causes a kink.The kink caused by the R-group ring prevents the amino group of Proline from participating in the H-bonding.
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which amino acids restrict alpha helical or beta pleated sheets
formation, what are the properties that...
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues....
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues. Then, hydrogen bonds are formed between the oxygen atom in amino acid along the the carbonyl group in the first amino acid and the hydrogen atom in the amine group of the chain. Select the correct answer below: third second fourth fifth FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with b...
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with bulky side chains while the B-pleated sheets cannot? Select the correct answer below: O The R groups in the a-helix stabilize the structure, while they interfere with the hydrogen bonds in a B-pleated sheet. The R groups are contained inside the a-helix structure, while they interfere with the hydrogen bonds in a B- pleated sheet. O The R groups lie...
Understand alpha helices and beta pleated sheets Question Which of the following statements is not true...
Understand alpha helices and beta pleated sheets Question Which of the following statements is not true about R groups in B-pleated sheet? a. The R groups of the peptide chain point outside. b. The R groups are attached to the carbons and extend above and below the folds of the pleat. c. The amino acids tend to have smaller R groups. Select the correct answer below: a and b a and c b and c only a FEEDBACK MORE INSTRUCTION...
Understand alpha helices and beta pleated sheets Question Which amino acid from the following list best...
Understand alpha helices and beta pleated sheets Question Which amino acid from the following list best fits the B-pleated sheet? Select the correct answer below: tryptophan alanine arginine lysine FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
Understand alpha helices and beta pleated sheets Question The coiling of an a-helix is maintained in...
Understand alpha helices and beta pleated sheets Question The coiling of an a-helix is maintained in position by which of the following bonds? Select the correct answer below: O hydrogen bonds between the oxygen atom in the carbonyl group in one amino acid and the hydrogen atom of the hydroxyl group in an R-group of another amino acid that is four amino acids farther along the chain O hydrogen bonds between the oxygen atom in the carbonyl group in one...
Which amino acids are not well suited for the alpha helical architecture and why?
Which amino acids are not well suited for the alpha helical architecture and why?
Understand alpha helices and beta pleated sheets Question The coiling of an a-helix is maintained in...
Understand alpha helices and beta pleated sheets Question The coiling of an a-helix is maintained in position by which of the following bonds? Select the correct answer below: hydrogen bonds between the oxygen atom in the carbonyl group in one amino acid and the hydrogen atom of the hydroxyl group in an R-group of another amino acid that is four amino acids farther along the chain O hydrogen bonds between the oxygen atom in the carbonyl group in one amino...
A β-pleated sheet, contained within a globular protein, has two parallel strands connected by a turn....
A β-pleated sheet, contained within a globular protein, has two parallel strands connected by a turn. The turn is called a “beta-alpha-beta” motif. The α-helical portion (the turn) consists of 34 amino acids. The molecular weight of the entire sheet (including the α-helix) is 9.7 kd. What is the approximate length (i.e., the longest dimension) of this β-pleated sheet? Assume that the α-helix does not contribute to the length of the β-pleated sheet. (HINT: Since the amino acids in this...
4. In contrast to the alpha amino acids which are ubiquitous in nature, beta amino acids...
4. In contrast to the alpha amino acids which are ubiquitous in nature, beta amino acids (with an extra carbon in the backbone) are quite rare. They form secondary structures that have very different conformations from traditional proteins. For instance, the compound shown below is the simplest beta amino acid; unusually, it is most stable in a gauche conformation. Draw it and explain why, co, Corn lonic c Hdi athrachan H₂N HT 5. Quebrachitol is a naturally occurring compound found...
1) Indicate why alpha helices and beta sheets help "bury" hydrophobic amino acids in the interior...
1) Indicate why alpha helices and beta sheets help "bury" hydrophobic amino acids in the interior of a folded polypeptide in an aqueous environment. 2) Explain what is meant by the statement "Protein folding is driven by hydrophobic interactions" and under what conditions this is true.
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues. Then, hydrogen bonds are formed between the oxygen atom in amino acid along the the carbonyl group in the first amino acid and the hydrogen atom in the amine group of the chain. Select the correct answer below: third second fourth fifth FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with bulky side chains while the B-pleated sheets cannot? Select the correct answer below: O The R groups in the a-helix stabilize the structure, while they interfere with the hydrogen bonds in a B-pleated sheet. The R groups are contained inside the a-helix structure, while they interfere with the hydrogen bonds in a B- pleated sheet. O The R groups lie...
Understand alpha helices and beta pleated sheets Question Which of the following statements is not true about R groups in B-pleated sheet? a. The R groups of the peptide chain point outside. b. The R groups are attached to the carbons and extend above and below the folds of the pleat. c. The amino acids tend to have smaller R groups. Select the correct answer below: a and b a and c b and c only a FEEDBACK MORE INSTRUCTION...
Understand alpha helices and beta pleated sheets Question Which amino acid from the following list best fits the B-pleated sheet? Select the correct answer below: tryptophan alanine arginine lysine FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
Understand alpha helices and beta pleated sheets Question The coiling of an a-helix is maintained in position by which of the following bonds? Select the correct answer below: O hydrogen bonds between the oxygen atom in the carbonyl group in one amino acid and the hydrogen atom of the hydroxyl group in an R-group of another amino acid that is four amino acids farther along the chain O hydrogen bonds between the oxygen atom in the carbonyl group in one...
Understand alpha helices and beta pleated sheets Question The coiling of an a-helix is maintained in position by which of the following bonds? Select the correct answer below: hydrogen bonds between the oxygen atom in the carbonyl group in one amino acid and the hydrogen atom of the hydroxyl group in an R-group of another amino acid that is four amino acids farther along the chain O hydrogen bonds between the oxygen atom in the carbonyl group in one amino...
4. In contrast to the alpha amino acids which are ubiquitous in nature, beta amino acids (with an extra carbon in the backbone) are quite rare. They form secondary structures that have very different conformations from traditional proteins. For instance, the compound shown below is the simplest beta amino acid; unusually, it is most stable in a gauche conformation. Draw it and explain why, co, Corn lonic c Hdi athrachan H₂N HT 5. Quebrachitol is a naturally occurring compound found...
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