All regulated steps Flashcards
PFK1
Glycolysis
F6P»F1,6BP
requires ATP
Hexokinase
Glycolysis
glucose»G6P
requires ATP
Phosphoglycerate Kinase
Glycolysis
1,3-BPglycerate»3-phosphoglycerate
makes ATP
Pyruvate Kinase
Glycolysis
PEP»pyruvate
makes ATP
GAP Dehydrogenase
**Not a regulated step
Glycolysis
makes NADH
Pyruvate Carboxylase
Gluconeogenesis
pyruvate»OAA
requires ATP
PEP carboxylase
Gluconeogenesis
OAA»PEP
requires ATP
F1,6-bisphosphatase
Gluconeogenesis
F1,6BP»F6P
requires ATP
G6-phosphatase
Gluconeogenesis
G6P»Glucose
requires ATP
Glycogen Degradation
-same reaction
PDH complex
pyruvate»acetyl-CoA + CO2 + NADH
Isocitrate dehydrogenase
CAC
isocitrate»alpha-KG + CO2 + NADH
alpha-KGDH
CAC
alpha-KG»succinyl-CoA + CO2 + NADH
PDH Kinase
regulates PDH complex via phosphorylation
Glycogen Phosphorylase
Glycogen degradation
- releases G1P from glycogen
- *active when phosphorylated
Glycogen Synthase
Glycogen synthesis
takes glucose from UDP-glucose to alpha(1,4) glycosidic bonds (non-reducing ends)
G6PD
PPP
G6P»6-phosphoglucolactone + NADPH
CPT 1
FA degradation
- transport of FA into mitochondria
acyl-CoA + carnitine» acyl-Canitine
HMG-CoA Lyase
Ketone Bodies Synthesis
HMG-CoA»Acetoacetate
Acetyl-CoA Carboxylase
FA synthesis
acetyl-CoA»malonyl-CoA
HM-CoA Reductase
Cholesterol synthesis
HMG-CoA + 2 NADPH»_space; Mevalonic acid
Phosphocholine cytidyltransferase
Phosphotidylcholine synthesis
DGAT (acyl-CoA:diacylglycerol acyltransferase)
TAG synthesis
DAG»TAG
Carbamoyl Phosphate Synthetase 1
Urea cycle (rate-limiting step) HCO3- + 2ATP + NH4+ >> Carbamoyl phosphate
Aminolevulinine Acid (ALA) Synthase
Heme synthesis
succinyl-CoA + glycine»_space; ALA
Amidophosphoribosyltransferase
Purine synthesis (committed step) PRPP + Glutamine >> PRA + Glutamate
IMP Dehydrogenase
GMP synthesis (rate-limiting step) IMP>>XMP
Adenylosuccinate Synthetase
AMP synthesis (rate-limiting step) IMP>>adenylosuccinate
Carbamoyl Phosphate Synthetase II
de novo pyrimidine synthesis
CO2 + 2 ATP + glutamine»_space; carbamoyl phosphate + glutamate