Gluconeogenesis Flashcards
Step 1
Substrate
Enzyme
Product
Hormone
Carboxylation
Pyruvate
Pyruvate carboxylase (biotin-dependent) Oxaloacetate
Glucagon, Cortisol
Step 2
Substrate
Enzyme
Product
Decarboxylation & Phosphorylation
Oxaloacetate
Phosphoenolpyruvate carboxykinase (PEPCK) Phosphoenolpyruvate (PEP)
Step 3
Substrate
Enzyme
Product
Hydration
PEP
Enolase
2-Phosphoglycerate
Step 4
Substrate
Enzyme
Product
Isomerization
2-Phosphoglycerate
Phosphoglycerate mutase
3-Phosphoglycerate
Step 5
Substrate
Enzyme
Product
ATP consumption
3-Phosphoglycerate
Phosphoglycerate kinase
1,3-Bisphosphoglycerate
Step 6
Substrate
Enzyme
Product
Reduction
1,3-Bisphosphoglycerate
Glyceraldehyde-3-phosphate dehydrogenase
Glyceraldehyde-3-phosphate (G3P)
Step 7
Substrate
Enzyme
Product
Isomerization
DHAP
Triose phosphate isomerase
G3P
Step 8
Substrate
Enzyme
Product
Condensation
G3P, G3P
Aldolase
Fructose-1,6-bisphosphate
Step 9
Substrate
Enzyme
Product
Dephosphorylation (Bypass)
Fructose-1,6-bisphosphate
Fructose-1,6-bisphosphatase
Fructose-6-phosphate
Step 10
Substrate
Enzyme
Product
Isomerization
Fructose-6-phosphate
Phosphohexose isomerase
Glucose-6-phosphate
Step 11
Substrate
Enzyme
Product
Dephosphorylation (Bypass)
Glucose-6-phosphate
Glucose-6-phosphatase
Glucose