2. S100A6 is a signaling protein that interacts with another protein, SIP, to regulate protein degradation activity in cells. The S100A6/SIP interaction can be described as the following reaction: Kp S100A6 : SIP S100A6 + SIP The Kp is 2 µM. The structure of the S100A6/SIP interaction is shown below. S100A6 is shown as a blue surface, SIP as an orange peptide. A conserved methionine residue on SIP (spheres in center of figure) interacts with a hydrophobic pocket on S100A6. (a) Draw a curve showing the fraction saturation of S100A6 with increasing concentrations of SIP, labeling the Kp on the curve. (Feel free to make in Excel). (b) Would you predict mutating the Met to a Leu or Lys would be more disruptive to binding? Please justify your answer. (c) Draw the fractional saturation vs. [SIP] curve for your mutant curve, clearly labeling how it differs from the wildtype curve you drew in (a).
2. S100A6 is a signaling protein that interacts with another protein, SIP, to regulate protein degradation activity in cells. The S100A6/SIP interaction can be described as the following reaction: Kp S100A6 : SIP S100A6 + SIP The Kp is 2 µM. The structure of the S100A6/SIP interaction is shown below. S100A6 is shown as a blue surface, SIP as an orange peptide. A conserved methionine residue on SIP (spheres in center of figure) interacts with a hydrophobic pocket on S100A6. (a) Draw a curve showing the fraction saturation of S100A6 with increasing concentrations of SIP, labeling the Kp on the curve. (Feel free to make in Excel). (b) Would you predict mutating the Met to a Leu or Lys would be more disruptive to binding? Please justify your answer. (c) Draw the fractional saturation vs. [SIP] curve for your mutant curve, clearly labeling how it differs from the wildtype curve you drew in (a).
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
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