A. Write the structure of the pentapeptide GLDSC.B. What is the complete name of this pentapeptide?Show a tertiary structure of ACGGC after adisulfide bond forms.A sample of an unknown peptide was divided intotwo aliquots. One aliquot was treated with trypsin;the other was treated with cyanogen bromide.Given the following sequences (N-terminal to C-terminal) of the resulting fragments, deduce thesequence of the original peptide.Trypsin treatmentAsn-Thr-Trp-Met-lle-LysGly-Tyr-Met-Gin-PheVal-Leu-Gly-Met-Ser-ArgCyanogen bromide treatmentGin-PheVal-Leu-Gly-Metlle-Lys-Gly-Tyr-MetSer-Arg-Asn-Thr-Trp-Met

A) Pentapeptide GLDSC contains five amino acids i.e, glycine, leucine, aspartic acid, serine, and…

Answered: A Write the structure of the…

Organic And Biological Chemistry

7th Edition

ISBN:9781305081079

Author:STOKER, H. Stephen (howard Stephen)

Publisher:STOKER, H. Stephen (howard Stephen)

Chapter9: Proteins

Section: Chapter Questions

Problem 9.58EP

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Similar questions

Give the sequence of the following tetrapeptide:
Decide if the side chains of the following peptides are nonpolar or polar, and label the hydrophobic and hydrophilic end of each peptide.a. VLLFGEDEKb. RKYSFLGAA
A peptide has the following amino acid composition: 2 Met, 2 Phe, 2 Glu, 1 Arg, 1 Lys, 1 Val, 1 Leu, 1 Gly, 1 Ser Reaction of the intact peptide with dansyl chloride followed by acid hydrolysis creates a derivative of Met. A specific cleavage of the intact peptide produces fragments with the following sequences: Fragment A: Glu-Gly-Lys-Phe Fragment B: Met-Ser-Leu-Arg Fragment C: Met-Val-Glu-Phe What information do this result give about the sequence of the peptide? Explain how you arrived on your answer. a) The sequence is: Met-Val-Glu-Phe-Glu-Gly-Lys-Phe-Met-Ser-Leu-Arg b) The sequence is: Met-Ser-Leu-Arg-Met-Val-Glu-Phe-Glu-Gly-Lys-Phe c) The sequence is: Met-Val-Glu-Phe-Met-Ser-Leu-Arg-Glu-Gly-Lys-Phe d) The sequence is: Met-Ser-Leu-Arg-Glu-Gly-Lys-Phe-Met Val-Glu-Phe
Draw the structure of the tetrapeptide Asp-Arg-Val-Tyr. Please show the appropriate stereochemistry of the natural amino acids in the resulting peptide. Please draw all ionizable groups in their neutral form.
Determine the amino acid sequence of a polypeptide from the following data:Complete hydrolysis of the peptide yields Ala, Arg, Gly, 2 Lys, Met, Phe, Pro, 2 Ser, Tyr, and Val.Treatment with Edman’s reagent releases PTH-Val.Carboxypeptidase A releases Ala. Treatment with trypsin yields the following three peptides:1. Gly, Lys, Met, Tyr 2. Ala, Lys, Phe, Pro, Ser 3. Arg, Ser, Val
Three peptides were obtained from a trypsin digestion of two different polypeptides. In each case, indicate the possible sequences from the given data and tell what further experiment should be carried out in order to determine the primary structure of the polypeptide. a. polypeptide I: 1. Val-Gly-Asp-Lys 2. Leu-Glu-Pro-Ala-Arg 3. Ala-Leu-Gly-Asp b. polypeptide II: 1. Val-Leu-Gly-Glu 2. Ala-Glu-Pro-Arg 3. Ala-Met-Gly-Lys
Determine the amino acid sequence of a polypeptide from the following data:Complete hydrolysis of the peptide yields Arg, 2 Gly, Ile, 3 Leu, 2 Lys, 2 Met, 2 Phe, Pro, Ser, 2 Tyr, and Val.Treatment with Edman’s reagent releases PTH-Gly.Carboxypeptidase A releases Phe. Treatment with cyanogen bromide yields the following three peptides:1. Gly-Leu-Tyr-Phe-Lys-Ser-Met 2. Gly-Leu-Tyr-Lys-Val-Ile-Arg-Met 3. Leu-Pro-Phe
Three peptides were obtained from a trypsin digestion of two different polypeptides. indicate the possible sequences from the given data and tell what further experiment should be carried out in order to determine the primary structure of the polypeptide. polypeptide I: 1. Val-Gly-Asp-Lys 2. Leu-Glu-Pro-Ala-Arg 3. Ala-Leu-Gly-Asp
Determine the amino acid sequence of a polypeptide from the following data: Complete hydrolysis of the peptide yields Ala, Arg, Gly, 2 Lys, Met, Phe, Pro, 2 Ser, Tyr, and Val. Treatment with Edman’s reagent releases PTH-Val. Carboxypeptidase A releases Ala. Treatment with cyanogen bromide yields the following two peptides: 1. Ala, 2 Lys, Phe, Pro, Ser, Tyr 2. Arg, Gly, Met, Ser, Val Treatment with trypsin yields the following three peptides: 1. Gly, Lys, Met, Tyr 2. Ala, Lys, Phe, Pro, Ser 3. Arg, Ser, Val Treatment with chymotrypsin yields the following three peptides: 1. 2 Lys, Phe, Pro 2. Arg, Gly, Met, Ser, Tyr, Val 3. Ala, Ser
His-Met-Asp-Tyr-Phe-Ser within this peptide, which amino acid residue is the most hydrophobic and why?
Chemistry Draw this peptide showing correct stereochemistry (hashed/wedged bonds) and please explain thoroughly. N-terminus - Val - Leu - Tyr - Cys - Ala - Gly - C-terminus
An oligopeptide, 6 amino acids in length, was subjected to acid hydrolysis and yielded equimolar amounts of the following amino acids (in alphabetical order): Arg Gln Lys Met Thr Tyr Based on the following separate treatments, which amino acid is in position #5 of this sequence? a. Cyanogen bromide treatment had no effect. b. Trypsin treatment yielded a dipeptide, a tripeptide and free arginine. The tripeptide had a net positive charge at pH 7. c. Chymotrypsin treatment yielded a dipeptide and a tetrapeptide. The dipeptide had a net charge of zero at pH 5. d. The phenylthiohydantoin derivative released by one round of Edman degradation was PTH-Thr.

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