Consider the dissociation reaction for a protein-ligand complex: P•L P + L A. Sketch a binding curve (fractional saturation 0 vs. ligand concentration [L]) for this protein-ligand complex (ligand A). Show where on that curve you could obtain the dissociation equilibrium constant Ka for the reaction. B. Now sketch on the same axes a 0 vs. [L] plot for a different ligand (B) that binds more weakly than the first ligand. C. Does the weaker binding ligand have a higher, or lower, Ka than the tighter binding ligand?

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
I’m having hard time drawing the graph to answer these questions can you show how to approach them?
Consider the dissociation reaction for a protein-ligand complex: P•L P + L
A. Sketch a binding curve (fractional saturation 0 vs. ligand concentration [L]) for this protein-ligand
complex (ligand A). Show where on that curve you could obtain the dissociation equilibrium
constant Ka for the reaction.
B. Now sketch on the same axes a 0 vs. [L] plot for a different ligand (B) that binds more weakly
than the first ligand.
C. Does the weaker binding ligand have a higher, or lower, Ka than the tighter binding ligand?
D. Sketch a binding curve for a cooperatively bound ligand with Ko.5 higher than that of Kd for A or
B. (Note: for cooperative binding, each protein molecule would have to have more than 1 binding
site for the ligand; Ko.5 is the experimentally determined ligand concentration that gives 0 = 0.5.)
Transcribed Image Text:Consider the dissociation reaction for a protein-ligand complex: P•L P + L A. Sketch a binding curve (fractional saturation 0 vs. ligand concentration [L]) for this protein-ligand complex (ligand A). Show where on that curve you could obtain the dissociation equilibrium constant Ka for the reaction. B. Now sketch on the same axes a 0 vs. [L] plot for a different ligand (B) that binds more weakly than the first ligand. C. Does the weaker binding ligand have a higher, or lower, Ka than the tighter binding ligand? D. Sketch a binding curve for a cooperatively bound ligand with Ko.5 higher than that of Kd for A or B. (Note: for cooperative binding, each protein molecule would have to have more than 1 binding site for the ligand; Ko.5 is the experimentally determined ligand concentration that gives 0 = 0.5.)
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781319114671
Author:
Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:
W. H. Freeman
Lehninger Principles of Biochemistry
Lehninger Principles of Biochemistry
Biochemistry
ISBN:
9781464126116
Author:
David L. Nelson, Michael M. Cox
Publisher:
W. H. Freeman
Fundamentals of Biochemistry: Life at the Molecul…
Fundamentals of Biochemistry: Life at the Molecul…
Biochemistry
ISBN:
9781118918401
Author:
Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher:
WILEY
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781305961135
Author:
Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher:
Cengage Learning
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781305577206
Author:
Reginald H. Garrett, Charles M. Grisham
Publisher:
Cengage Learning
Fundamentals of General, Organic, and Biological …
Fundamentals of General, Organic, and Biological …
Biochemistry
ISBN:
9780134015187
Author:
John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher:
PEARSON