Question

All things being equal, and assuming no perturbation of PKas by an enzyme, what two amino...

All things being equal, and assuming no perturbation of PKas by an enzyme, what two amino acids
would be the only choice for general acid-base catalysis at pH 7.4? Why?

0 0
Add a comment Improve this question Transcribed image text
Answer #1

Aspartic Acid (D) and Glutamic Acid (E) should be prefered amino acids.

Aspartic acid and Glutamic acid are acidic amino acids (with pI 2.7 and 3.2 respectively) therefore, N terminals of these amino acids will work as nucleophile in the basic medium (@ pH 7.4) and will catalyze the Acid - Base hydrolysis.

Add a comment
Know the answer?
Add Answer to:
All things being equal, and assuming no perturbation of PKas by an enzyme, what two amino...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • Enzyme B has two arginine amino acid resídues that are responsible for catalysis. For catalysis one...

    Enzyme B has two arginine amino acid resídues that are responsible for catalysis. For catalysis one arginine side chain is protonated and one is deprotonated. What is the optimal pH for Enzyme B activity? 2 4 6 10 12 please show

  • The HIV protease enzyme uses a general acid-base catalysis mechanism to cleave viral polypeptides but does...

    The HIV protease enzyme uses a general acid-base catalysis mechanism to cleave viral polypeptides but does not use a covalent catalysis. This enzyme functions optimally in the pH range of 4-6. Due to the specific amino acids involved in this catalysis, HIV protease is a member of which subclass of proteases? Select one: A. metalloproteases B. aspartyl proteases C. serine proteases D. lysine proteases E. cysteine proteases

  • 1. Enzymes catalyze reactions by diverse mechanisms, frequently involving multiple steps. Consider the well-studied enzyme called...

    1. Enzymes catalyze reactions by diverse mechanisms, frequently involving multiple steps. Consider the well-studied enzyme called chymotrypsin, which has three amino acids in its active site: Asp102, His 57, and Ser 195. What is the catalytic role of His 57? A. covalent catalysis B. general acid-base C. catalysis catalysis by approximation D. metal ion catalysis 2. Which of the following functional groups are not found in carbohydrates? A. aldehydes B. hydroxyls C. ketones D. thiols 3. What are the components...

  • single letter abbreviation of all amino acids that correspond 4. Amino acids. The side chains of...

    single letter abbreviation of all amino acids that correspond 4. Amino acids. The side chains of amino acids have a wide spectrum of chemical and physical properties. In each sp. provided below, write the single-letter abbreviations of all amino acids that match the description positively charged side chains at pH 7.4 negatively charged side chains at pH 7.4 negatively charged side chains at pH 12 achiral contains two chiral carbons side chain restricts the rotation of main chain contains carboxamide...

  • Lecture 3 Identify amino-/carboxy termini, and R-group on amino acid What is chirality? Identify a carbon...

    Lecture 3 Identify amino-/carboxy termini, and R-group on amino acid What is chirality? Identify a carbon that is chiral (i.e., has 4 different groups attached) Chiral compounds rotate plane polarized light Memorize amino acid 1) structure, 2) classification (hydrophobic, aliphatic, aromatic, negatively charged, positively charged, polar uncharged) Be able to draw glycine (the generic amino acid) Given an amino acid structure and pKas of ionizable groups, be able to determine the charge at pH 1, pH 14, and pH 7...

  • Week 14- Chapter 21 Homework Problem 21.72 < 52 of 58 Review Constants| Periodic Table Part A How does a point mutation for an enzyme affect the order of amino acids in that protein? Drag the term...

    Week 14- Chapter 21 Homework Problem 21.72 < 52 of 58 Review Constants| Periodic Table Part A How does a point mutation for an enzyme affect the order of amino acids in that protein? Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Reset Help then the order of amino acids will change in the of the polypeptide chain If the resulting codon still codes for the same amino acid, If the...

  • kcal/K 210 Which mutation below is the least detrimental to the enzyme function? PH 8.0 variant...

    kcal/K 210 Which mutation below is the least detrimental to the enzyme function? PH 8.0 variant keat (min-) Km (M) wild-type 3200 HS7A 0.054 H57L 0.075 HS7D 0.78 HSTE 0.69 HSOK 0.83 HSOR 0.017 DIO2N 1.3 H57A, D102N 0.17 H57D, D102N 0.18 H57K, D102N 0.41 H57L, D102N 0.13 S195A 0.079 S19ST 0.011 H57A, D102N, S195A 0.038 kbuffer (min) no enzyme 6.0 x 10-7 21 4.2 87 62 0.0032 0.0037 0.06 0.033 0.020 0.00025 0.30 0.0019 0.0029 0.023 0.0031 0.0019 0.00052...

  • 7. From what you understand about enzymes, explain why a change in an amino acid would...

    7. From what you understand about enzymes, explain why a change in an amino acid would cause Harry's enzyme to lose its function. 8. In both of Henry's mutations, it is the first nucleotide in the DNA triplet code that has been changed. a. Using the genetic code chart below, create a list of single nucleotide changes in the two affected triplet codes described for Henry's genes that could occur WITHOUT resulting in a change in the amino acid in...

  • of alanine has a pk of 9.87. What is the 153, The amino group charge on...

    of alanine has a pk of 9.87. What is the 153, The amino group charge on that amino group at pH 7.0 145. Which amino acid serves as the first amino acid at the hN terminus of a newly synthesized protein? (B) methionine (A) alanine 9.80. The side chain of that amino acid includes (A) an amine group (C) a carboxylic acid group. (D) an alcohol 154. A certain amino acid has a pl (or pH, isoelectric point) (D) threonine...

  • 2. what is the configuration of almost all naturally occurring amino acids at the a (alpha)...

    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 name of the nucleosides in dna and rna 7. give the structure of...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT