Name the protein structural element shown in yellow in the figure:
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- Consider the following protein sequence as an α helix: Leu-Lys-Arg-Ile-Val-Asp-Ile-Leu-Ser-Arg-Leu-Phe-Lys-Val. how many turns does this helix make?The protein shown here is flavodoxin, which contains both alpha helices and beta sheets.If a quaternary (4°) protein structure has six N-terminus. How many total subunits does it have?
- In the following polypeptide, which amino acid would be participating in hydrogen bonding with alanine, given this sequence forms an alpha helix? Please write out the full amino acid name, not the abbreviation. Met-Ala-Leu-Glu-Lys-Thr-Leu-ValDoes right-handed alpha-helix has the least restricted ϕ and ψ angles in polypeptides, compared with left-handed alpha-helix and beta sheet?Can someone please explain why SWSTSFS has trouble becoming alpha helix and KKWWTTQ does not?
- If an Arg residue in a protein was replaced with either Lys or Glu amino acid, whichsubstitution would you expect to result in the greatest structural change and why?Consider a peptide AKCVSEAALRIKQEANSL. Which of the following secondary structures the peptide can fold into? a. colagen helix b. amphipathic alpha-helix c. alpha helix in a colied coil d. beta-strandFor the three peptides below, label whether they would form an amphiphilic beta-strand, amphiphilic helix, or nothing. Explain why. Part a) S-V-K-I-Q-M-R-A-D-L Part b) A-L-E-H-M-F-R-Y-L-A-K Part c) A-L-A-I-W-F-P-D-R-K-E
- A protein with which of the following sequences may be more prone to undergo farnesylation? (a) Trp-Ala-Ala-Cys (b) Ser-Gly-Gly-Glu (c) Ser-Ala-Ala-Trp (d) Cys-Leu-Leu-SerConvert the following sequence into protein strand using one letter code: 5'-ACCAACCAACTTTCGATCTCTTGTAGATCT-3'Consider an alpha-helix comprised of twelve amino acid residues. How many hydrogen bonds should be formed between backbone atoms in this helix?