At a steady state in the living cell, (ATP) = 10-3M and (ADP) = 10-4 M. The maximum (equilibrium) value of the ratio (glycerol-1-P)/(glycerol) is observed to be 770 at 25 °C and pH=7. Calculate K and DrG° for the reaction

Biochemistry
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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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A key step in the biosynthesis of triglycerides (fats) is the conversion of glycerol to glycerol-1-phosphate by ATP:

At a steady state in the living cell, (ATP) = 10-3M and (ADP) = 10-4 M. The maximum (equilibrium) value of the ratio (glycerol-1-P)/(glycerol) is observed to be 770 at 25 °C

and pH=7.

  1. Calculate K and DrG° for the reaction.
  2. Using the value of DrG° for the reaction ADP + Pi àATP + H2O, together with the answer to part (a), calculate DrG° and K for the reaction: glycerol + phosphateà glycerol-1-phosphate+ H2O .
Mg2+
a-glycerol kinase
glyserol-1-phosphate (G-1-P) + ADP
Glyserol (G) +
АТР
Transcribed Image Text:Mg2+ a-glycerol kinase glyserol-1-phosphate (G-1-P) + ADP Glyserol (G) + АТР
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