The rate of the peptidyl transferase reaction increases as the pH increasesfrom 6 to 8. Explain these results in terms of its reaction mechanism.
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The rate of the peptidyl transferase reaction increases as the pH increases
from 6 to 8. Explain these results in terms of its reaction mechanism.
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- Cyanobacteria contain carboxysomes, which consist of a protein shell that encloses RuBP carboxylase and is permeable to small anions such as HCO−3. Explain why carbonic anhydrase is also a component of the carboxysome.complete the following mechanism showing the cleavge of the peptide bond for the following cysteine protease reaction. you only need a catalytic dyad for cystein proteases because the pKa of cysteine is low enough (8) and close enough to the pH of 7.4 that is can easily be deprotonated by histidine.Contrast the resultant orientation of themacrodipoles of cytochrome b562 consisting of 4 alpha-heli-ces with that in bacteriorhodopsin consisting of 7 alpha-heli-ces. The diagram of bacteriorhodopsin on the right takenfrom the textbook (Figure 11-10) shows that the C-termi-nal end of the helix-7 is located in the cytoplasm. Thefunction of this protein is translocate protons from the cy-toplasm to the exterior. How might the terminal -COO-group and the helix dipole of helix #7 augment or dimin-ish the function of the protein?.
- At what pH is the formation of the acyl-enzyme complex likely to occur. Provide explanation for this.Chymptrysin preferentially binds thetransition state. Explain what is meant by this.Many people who are lactose intolerant can eat yogurt, which is prepared from milk curdled by bacteria, without any digestive problems. Give a reason why this is possible. (Hint: Read the label on each of several yogurt containers. Do the ingredients make a difference?)
- Since cells of Halobacterium require high levels of Na+ for growth,why is this not true for the organism’s cytoplasmic enzymes?A set of DSC curves for a solution of Lysozyme at several pH values is given in the image. A. Explain how the curves above relate to the enthalpy of unfolding for each of these curves. B. Question b is attached as an image.Based on this graph, it appears that carboxylesterase is most active at a pH of A. 3.5B. 1.5C. 5D. 4
- 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 newly discovered blob protein folds very rapidly in the presence of protein disulphide isomerase and peptidyl prolyl cis-trans isomerase enzymes but aggregates and never folds correctly without protein disulphide isomerase. Explain why this might occur.Can you explain the name of cytochrome oxidase?