A toxin is glycopeptide, X that is composed of an octapeptide and a saccharide Y.Glycopeptide X is composed of a glycan Y and an octapeptide. The octapeptide was cleaved bytrypsin, giving 2 tetrapeptides of exactly the same composition except for its N-terminals. Whenthe octapeptide was cleaved by chymotrypsin, it gave a pentapeptide and a tripeptide. DNFBtreatment gave DNP-ser. The composition of the octapeptide is lys, ser, trp.and leu. The leu:serratio is 4:1.1. What is the sequence of this octapeptide?Saccharide Y is a tetrasaccharide. To determine its linkages, a person methylated glycopeptideX effectively methylating saccharide Y. Cleavage gave the peptide and the following products:2,3,4-tri-O-methyl-a-D-glucopyranoside acid, 2,3-di-O-methyl-ß-D- glucopyranoside, 1,3,4-tri-O-methyl-ß-D-glucuronic acidtreatments to the isolated tetrasaccharide gave the following results:and1,4,6-tri-O-methyl-ß-D-N- acetylgalactosamine. Further1. A. Treatment of saccharide Y with an a-1,4 glycosidase gave a trisaccharide andglucopyranose.2. Treatment of saccharide Y with a 2,6-glycosidase also gave a trisaccharide andglucuronic acid.2. Give the structure of saccharide Y3. If saccharide Y is O-linked to the octapeptide, with which sugar (monosaccharide)octapeptide linked and to which amino acid is this sugar attached? Show the linkage.the4. The glycopeptide X, when released from its capsule, is immediately acted upon by a membraneenzyme and linked into a protein in the membrane of cells. The membrane protein, having beenconverted into a glycoprotein becomes an open channel for glucose in muscle, intestinal and livercells. In addition, it also allows passage of Na+ and K+, the former in symport with glucose whilethe latter is in antiport with glucose. What effect will this have on the electrolyte balance in thesecells?At a certain concentration of Na+, the lipoxygenase system is activated in the muscle cells anda vasoactive compound and SRS-like compound is released.5. Why would this release of vasoactive/SRS-like compound can kill a person?

Trypsin and chymotrypsin are the proteases that break down protein into individual amino acids.…

Answered: Glycopeptide X is composed of a glycan…

Curren'S Math For Meds: Dosages & Sol

11th Edition

ISBN:9781305143531

Author:CURREN

Publisher:CURREN

Chapter9: Parenteral Medication Labels And Dosage Calculation

Section: Chapter Questions

Problem 6.7P

See similar textbooks

Similar questions

A decapeptide which could resist burns was isolated from an endemic plant from Mt. Mayon. Deduce the amino acid sequence of the decapeptide given the following informations. Mercaptoethanol gave two pentapeptides F1 and F2. Chymotrypsin treatment of F1 releases S and a tetrapeptide (C,K,F,M) while F2 gave a dipeptide (M,S) and a tripeptide (C,F,K) F1 when treated with CNBr released a free homoserine lactone and a tetrapeptide. Trypsin treatment of F1 gave a tripeptide and a dipeptide. F2 treated with carboxypeptidase released free M while with trypsin gave free K and a tetrapeptide.
The alkaline hydrolysis of pAUGCAGC oligonucleotide produces: O A. Uridine 2'-monophosphate, uridine 3'-monophosphate, cytosine 2'-monophosphate O B. Adenosine 2'-monophosphate, adenosine 3'-monophosphate, adenosine 21,5'-bisphosphate OC. Guanosine 2'-monophosphate, guanosine 3'-monophosphate, cytosine 3'-monophosphate O D. Cytidine 3'-monophosphate, guanosine 2'-monophosphate, adenine 2'-monophosphate O E. Adenine 3,5'-bisphosphate, guanine 2,5'-bisphosphate, uridine 2'-monophosphate O F. Uridine 2'-monophosphate, uridine 3'-monophosphate, guanine 3'-monophosphate
A nonapeptide was treated with dithiothreitol to reduce any disulfide bridges, then partially hydrolyzed, giving rise to the following fragments. What was the sequence of the original polypeptide? Phe-Gln-Asn Pro-Arg-Gly-NH2 Cys-Tyr-Phe Asn-Cys-Pro-Arg Tyr-Phe-Gln-Asn O Cys-Tyr-Phe-GIn-Asn-Cys-Pro-Arg-Gly-NH2 O H2N-Gly-Arg-Pro-Cys-Asn-Gln-Phe-Tyr-Cys O Gly-Arg-Pro-Cys-Tyr-Phe-Gln-Asn-Cys-NH2 Cys-Pro-Arg-Gly-NH2-Cys-Tyr-Phe-Gln-Asn O None of these are correct.
The enzyme cytidine deaminase catalyzes the conversion of cytidine to uridine. Cytidine deaminase catalyzes the reaction through an addition of water across the cytidine 3,4-bond, forming a tetrahedral intermediate followed by the elimination of NH3 to form the product uridine. This is like the addition-elimination mechanism that we studied for adenosine deaminase. Cytidine deaminase НО. NH₂ N пOH OH cytosine R + H₂O cytidine The Km value for the substrate cytidine is 2.5 × 10-4 M, and the K; for competitive inhibition by the product uridine is 2.5 × 10-³ M. N R A reduced derivative of the product, 3,4,5,6-tetrahydrouridine was shown to be a fully reversible competitive inhibitor with a Ki of 2.4 x 10-7 M, a value approximately 10,000 times lower than that of the product uridine. NH₂ NH uridine HO. N R R = D-ribose HOH OH uridine 3NH uracil ring numbering H NH H H + NH3 H OH H 3,4,5,6-tetra- hydrouridine a.) Draw a structure of the intermediate that we predict to form during the…
Penicillin reacts with the cysteine residue of penicillin binding protein. Show the reaction here.
A solution contains a mixture of four proteins: urease, ovalbumin, lysozyme, and alkaline phosphatase. The proteins have the following properties. Molecular weight (Daltons) Protein pl Urease 483,000 5.0 Ovalbumin 45,000 4.6 Lysozyme 86,000 11.0 Alkaline 86,000 4.6 Phosphatase Based on the information provided, what type of chromatography (gel permeation or ion exchange) could be used to separate: a) Lysozyme from Alkaline Phosphatase. Briefly explain your answer. b) Ovalbumin from Alkaline Phosphatase. Briefly explain your answer. c) Which of the four proteins would be bound to a cation exchanger equilibrated at pH 5? d) Briefly explain your answer to part c).
The ACE2 receptor protein in humans has been getting a lot of press these days, as it apparently serves as a "receptor" for the SARS-CoV-2 coronavirus in addition to its normal functions. This protein has an isoelectric pH of 5.36. Suppose you want to purify this protein to study its properties, with the goal of developing a drug that would block it from binding the virus. Once you have purified the cell surface proteins from your cultured human lung cells away from all the other types of molecules in the cell, and all the cytoplasmic proteins, you might decide to use ion exchange chromatography to separate the ACE2 proteins from other proteins in your sample. If you plan to load your protein mixture onto your ion exchange column in a buffer at pH 7.4 (approximately physiological pH) and you want the ACE2 proteins to bind to the column, should you use a resin with a positive charge or a negative charge? Briefly explain why you chose the resin you selected.
Explain why bacteria with the gene for the enzyme beta-lactamase are not susceptible to penicillin G. Support your explanation by creating a diagram of penicillin G. Label the beta-lactam ring.
A peptide with endorphin-like property was produced and obtained from the blood. This was sequence using the protocol: Treatment with streptococcal protease gave a tripeptide and a tetrapeptide. Treatment with trypsin gave two tripeptides and an amino acid. Treatment of the 2 tripeptide products in 1.2 with 2,4-dinitrophenol gave DNP- S, and DNP-E and a mixture of amino acids. The composition of the peptide is G, E, S, and K in a 2:1:1:3 molar ratio. What is the sequence of the peptide?
A peptide with endorphin-like property was produced and obtained from the blood. This was sequence using the protocol: Treatment with streptococcal protease gave a tripeptide and a tetrapeptide. Treatment with trypsin gave two tripeptides and an amino acid. Treatment of the 2 tripeptide products in 1.2 with 2,4-dinitrophenol gave DNP- S, and DNP-E and a mixture of amino acids. The composition of the peptide is G, E, S, and K in a 2:1:1:3 molar ratio. a. Determine the sequence of the peptide? b. Determine the pl and position in an electrophoretic profile
A) Draw L-histidine. Label all ionizable groups with the appropriate pKa.
A pentapeptide was found to have the composition Ala Arg Gly Pro Trp. Reaction of the pentapeptide with Sanger’s reagent, followed by hydrolysis, gave the DNP derivative of proline. Treatment of the pentapeptide with carboxypeptidase initially produced alanine. Treatment of the pentapeptide with trypsin gave a tetrapeptide which, when treated with chymotrypsin, produced a tripeptide. What is the sequence of the pentapeptide? (note: trypsin cleaves after basic amino acids) *

SEE MORE QUESTIONS

Recommended textbooks for you

Curren'S Math For Meds: Dosages & Sol

Nursing

ISBN:

9781305143531

Author:

CURREN

Publisher:

Cengage

Basic Clinical Laboratory Techniques 6E

Biology

ISBN:

9781133893943

Author:

ESTRIDGE

Publisher:

Cengage

Curren'S Math For Meds: Dosages & Sol

Nursing

ISBN:

9781305143531

Author:

CURREN

Publisher:

Cengage

Basic Clinical Laboratory Techniques 6E

Biology

ISBN:

9781133893943

Author:

ESTRIDGE

Publisher:

Cengage

SEE MORE TEXTBOOKS