Questions 31-35. The figure below represents a peptide with the sequence dicated
ID: 207727 • Letter: Q
Question
Questions 31-35. The figure below represents a peptide with the sequence dicated features or le". Answer the following questions by selecting the letters the the peptide. Note that the carbon and hydrogen atoms are the sequence "Ala-Glu-Gly-Ser-CysPhe- correspond to the indicated features of not explicitly shown 31. An amino acid that would likely be found in the interior of a correctly foided protein basic amino acid, such as 32. An amino acid acid that is expected to form an ionic bridge with 33. An amino acid that is involved in the formation of covalent cross-links between different regions of a tertiary structure of a protein. 34. An amino acid that is subject to phosphorylation during regulation of protein activity 35. The amino terminus of the peptideExplanation / Answer
31) Lysine
In the given peptide the leucine is hydrophobic amino acid and due to its hydrophobic nature, it always tries to avoid contact with the outer aqueous environment. During the protein folding the leucine hydrophobic amino acid move into the hydrophobic core region of the protein.
32) Glutamate
Ionic bridge or salt bridge is a combination of both hydrogen bond and ionic bond. The ionic bridges are formed between the amino acids which have the anionic carboxylate groups such as aspartic acid/ glutamic acid and the amino acids with cationic ammonium groups like lysine/arginine
33) Cysteine
It is sulphydryl (-SH) group in its structure and it interacts with –SH group of another cysteine with its –SH and form the disulfide linkage, which is an only covalent linkage found in the tertiary structure of a protein.
34) Serine
The amino acids with the oxygen in their side chain can easily phosphorylate by the kinases. The serine, threonine, and tyrosine are easily phosphorylated and the bond between the amino acid & the phosphate group is phosphate ester bond. Due to easy accessibility of R side chains to all kinases, these three amino acids are easily undergone phosphorylation than the other amino acids.
35) Alanine
Each polypeptide has both N-terminal (amino terminal) and C-terminal (Carboxyl terminal) ends. The amino-terminal has a free amino group and it indicates the beginning of a polypeptide. During the translation process, the polypeptide is synthesized in N-terminal to C-terminal direction.
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