All enzymes Flashcards
Alcohol Dehydrogenase
Turns alcohol into acetaldehyde which was produced from Pyruvate, reducing NADH to NAD+
Lactate Dehydrogenase
Pyruvate to Lactate and NADH to NAD
Reversible (see CORI cycle)
Hexokinase/Glucokinase
Glucose -> Glucose-6P and ATP->ADP
Irreversible
Phosphoglucose isomerase
Glucose 6P <-> Fructose 6P
Reversible
PFK1
F6P to F1,6BP and ATP to ADP
Irreversible
Aldolase
F1,6BP <-> DHAP and Glyceraldhyde 3P
Reversible
Triose Phosphate Isomerase
DHAP <-> Glyceraldehyde-3P
Reversible
Glyceraldehyde-3-P DH
Glyceraldehyde-3-P <-> 1,3BPG and NAD+Pi to NADH
Reversible
Phosphoglycerate kinase
1,3BPG <-> 3-P-Glycerate and ADP to ATP
Reversible
Phosphoglycerate mutase
3-P-Glycerate <-> 2-P-Glycerate
Reversible
Enolase
2-P-Glycerate <-> PEP
Reversible
Pyruvate Kinase
PEP to Pyruvate and ADP to ATP
Irreversible
PFK2/F2,6BPase
Phosphorylates/Dephosphorylates F6P to F2,6BP
Uses ATP for phosphorylation
Reversible
PKM2
fetal form of pyruvate kinase and present in some cancer cells
Fructokinase
Fructose to Fructose-1P and ATP to ADP
Irreversible
Aldolase B
Fructose-1P to Glyceraldhyde and DHAP
Reversible
Triose Kinase
Glyceraldehyde to Glyceraldehyde-3P and ATP to ADP
Irreversible
Galactokinase
Galactose to Galactose 1-P and ATP to ADP
Reversible
Galactose 1P uridyl transferase
Galactose 1-P + UDP Glucose -> UDP-Galactose + Glucose-1P
Reversible
UDP-glucose 4-epimerase
UDP-Galactose to UDP-Glucose
Pyruvate Decarboxylase (aka PDH)
E1
Pyruvate + TPP -> Hydroxyethyl:TPP + Co2 -> Acetyl-lipoic acid
Bound cofactor: TPP
Dihydrolipoyl Transacetylase
E2
Acetyl-lipoic acid +CoA -> Acetyl-CoA+ Dihydrolipoic acid
Bound cofactor: Lipoid acid
Dihydrolipoyl Dehydrogenase
E3
FAD + Dihydrolipoic acid -> FADH2 + Lipoid acid
NAD + FADH2 -> NADH + FAD
Bound cofactor: FAD
PDHC Phosphatase
PDHC-P to PDHC loss of Pi
Inactive to Active
PDHC Kinase
PDHC to PDHC-P and ATP to ADP
Active to Inactive
Aconitase
Citrate to cis-Aconitate to Isocitrate
H2O out then H2O in
Isocitrate DH
Isocitrate to ⍺-Ketoglutarate and NAD to NADH + CO2
Succinyl-CoA Synthetase
Succinyl-Coa to Succinate and GDP to GTP
⍺-Ketoglutarate DH
⍺-Ketoglutarate to Succinyl-CoA
NAD + CoA -> NADH +Co2
Succinate DH
Succinate to Fumarate and FAD to FADH2
Also Complex II, transfers electrons to CoQ
Fumarase
H2O + Fumarate -> Malate
Malate DH
Malate to Oxaloacetate and NAD to NADH
Malate-Aspartate shuttle
Citrate Synthase
Acetyl CoA + OAA -> Citrate + CoA
NADH-Q Reductase
Complex I, catalyzes the oxidation of NADH to NAD+, giving electrons to FMN and then to Fe-S, then to CoQ
Pumps 4 H+ across the inner membrane
QH2-cytochrome c reductase, cytochrome bc1
Complex III, takes electrons from CoQ and transfers them to cyctochrome c
Pumps 4 H+ across the inner membrane
ATP Synthase
Uses H+ gradient to pump 10 protons back into the matrix, producing 3 ATP
Cytochrome oxidase, a+a3
produces what?
Complex IV, takes electrons from cyt c, transfers them to O2 to produce H2O
Pumps 2 H+ across the inner membrane
Glycerol-3-P DH
Takes G3P from outside the cell and turns it into DHAP, reducing FAD into FADH2 to bring electrons to CoQ
DHAP is then transported out of the cell, turned back into G3P via oxidation of NADH to NAD
acyl-CoA DH
Converts Fatty acyl CoA to trans-2-enoyl CoA, reducing FAD to FADH2
FADH2 then can transfer its electrons to CoQ in the ETC
Aspartate Aminotransferase
Catalyzes the combination of OAA and Glutamate to ⍺KG and Aspartate and the reverse of this reaction
Adenine nucleotide translocase
Drives produced ATP into the cytosol and brings ADP into the matrix
Driven by charge difference generated by ATP Synthase, where ATP is more negative, so it is attracted to the positive charge on the outside of the mitochondria
Pyruvate Carboxylase
Catalyzes the conversion Pyruvate to OAA using CO2 and ATP, producing ADP and Pi
Irreversible
PEPCK
Catalyzes the conversion of OAA to PEP using GTP, producing CO2 and GDP
Irreversible
F1,6BPase
Catalyzes the conversion of F1,6BP to F1P using H2O and producing Pi
Irreversible
G6Phosphatase
Catalyzes the conversion of G6P to Glucose, using H2O and producing Pi
Irreversible
Alanine Aminotransferase
Catalyzes the conversion of Pyruvate to Alanine using Glutamate and producing ⍺KG in the liver and the opposite in the muscle (alanine cycle)
Reversible
Phosphoglucomutase
Catalyzes the conversion of G6P to G1P
Reversible
UDP-glucose phosphorylase
Uses UTP to convert G1P to UDP-Glucose, loss of PPi
Irreversible