Biochemistry - What kind of amino acids or amino acids derivatives form the cyclic peptide toxin...
Biochemistry - What kind of amino acids or amino acids derivatives form the cyclic peptide toxin alpha-amanitin?
Please draw the structure of each (I think there are 8 amino acids and a cysteine and a tryptophan residue?)
Homework Answers
alpha-Amanitin or α-amanitin is composed of cyclic peptide bond comprising of eight amino acids.
It consist of two loop : outer and inner
The outer loop is mainly constituted of peptide bonds which is formed between a COOH end of given amino acid and extend to the consecutive amino end of other residue.
Whereas the formation of inner loop is composed of tryptathionine bond which is formed between 6-hydroxy-tryptophan and sulfur containing cysteine amino acid
apart from that , α-amanitin is also incorporated with many other modified or derivative of various amino acid side residues like (2S,3R,4R)-4,5-dihydroxy-isoleucine and mainly trans-4-hydroxy-proline
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Biochemistry - What kind of amino acids or amino acids
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The one-letter sequence is: WATER
a) Draw the peptide (R-groups trans), indicating charges, in
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b) What is the isoelectric point?
c) What is the average charge on the population of peptide
macromolecules at pH = 2.2?
d) What is the average charge on the population of peptide
macromolecules at pH = 12.5?
TABLE 4.1 Amino Acid Alanine Arginine Asparagine Aspartic acid Cysteine....« Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine … Methionine Phenylalanine...
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6. For the following amino acids, write its 3-letter abbreviation draw its structure, and write its classification Amino acids are classified as nonpolar, polar noutral, polar acidic or polar basic, depending on the side chain present Isoleucine Asparagine Tyrosine Abbreviation Structure Serine Arginine Cysteine Name 3-Letter Abbreviation Structure Classification
8 pts Question 24 Identify the amino acids in the given cyclic peptide and report as a single letter code. At pH 7.0 what would be the pl of the given peptide. NH2 NH HOOC NH2 HTML Editorg xxEE B I A E G 12pt P
3. The questions below refer to the cyclic peptide shown below. HO H. -ΝΗ HN OH HN -NH ot SH Me a. This peptide is made from how many amino acids? (single number on the line) b. How many potential diastereomers are possible for this molecule? (single number) c. Starting at the glycine residue, draw the linear, Fmoc-protected form of the peptide shown above. Make sure you are drawing the correct stereochemistry! Do not use any abbreviations. Draw out the...
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5. Which of the 20 standard amino acids are a. Cyclic b. Aromatic C. Sometimes charged at physiological pH d. Technically not hydrophobic, polar, or charged e. Basic f. Acidic . Sulfur containing 6. Estimate the net charge of a His-His-His-His tetrapeptide at pH 6.0 7. The artificial non-nutritive sweetener aspartame is a dipeptide with the sequence Asp-Phe. The carboxyl terminus is methylated. Draw the structure of aspartame at pH 7.0. Sketch a titration curve for the amino acid cysteine,...
1. draw structures illustrating the hydrogen bonding between amide groups of peptide chains 2. what is the configuration of almost all naturally occurring amino acids at the a (alpha) carbon 3. why is an alpha amino acid such as alanine more acidic than a regular carboxyllic acid 4. strecker synthesis Formation dl-phenylalanine 5. outline the steps to synthesize the simple dipeptide AL (think about two amino acids that begin with an A and an L) 6. give the structure and...
The one-letter sequence is: WATER
a) Draw the peptide (R-groups trans), indicating charges, in
predominant form found at pH = 0.
b) What is the isoelectric point?
c) What is the average charge on the population of peptide
macromolecules at pH = 2.2?
d) What is the average charge on the population of peptide
macromolecules at pH = 12.5?
TABLE 4.1 Amino Acid Alanine Arginine Asparagine Aspartic acid Cysteine....« Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine … Methionine Phenylalanine...
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what are the answers to these?
6. For the following amino acids, write its 3-letter abbreviation draw its structure, and write its classification Amino acids are classified as nonpolar, polar noutral, polar acidic or polar basic, depending on the side chain present Isoleucine Asparagine Tyrosine Abbreviation Structure Serine Arginine Cysteine Name 3-Letter Abbreviation Structure Classification
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