les 10 reactions Flashcards

1
Q

Réaction 1

A

Phosphorylation Enzyme: Hexokinase/ Glucokinase
Réaction irreversible Glucose 6 P ne peu diffuser hors de la cellule
Glucose + ATP + hexokinase ou glucokinase nous donne Glucose - 6 phosphate + ADP + H+

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2
Q

Réaction 2

A

isomérisation
Enzyme: Glucose 6-P- isomérase
Glucose 6 - phosphate devient Fructose 6 phosphate
Reversible

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3
Q

Réaction 3

A

Phosphorylation Enzyme: Phosphofructokinase 1 (PFK 1)

Réaction irreversible

F6P Fructose - 6 - Phosphate + ATP + PFK1 nous donne
Fructose 1,6 biphosphate + ADP+ H+

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4
Q

Réaction 4

A

Lyase
Enzyme: Aldolase
Reversible
Scission en 2 trioses isomères

Fructose 1,6-bisphosphate nous donne
dihydroxyacetone phosphate (DHAP)
+
glyceraldehyde 3-phosphate (GAP)

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5
Q

Réaction 5

A

isomérisation Enzyme: Triose Phosphate Isomérase
Reversible

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6
Q

Réaction 6

A

Oxydation
Enzyme: Glycéraldéhyde 3- phosphate déshydrogénase
Reversible

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7
Q

Réaction 7:

A

Transfert de phosphoryle Enzyme: Phosphoglycérate kinase
1,3-bisphospho- glycerate devient en présence de Mg2+ ADP se transforme en ATP
3-phosphoglycerate
- Produit une molécule d’ATP
Reversible

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8
Q

Réaction 8:

A

isomérisation
Enzyme: Phosphoglycérate mutase
Reversible
3-phosphoglycerate devient 2-phosphoglycerate

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9
Q

Réaction 9:

A

déshydratation Enzyme: Enolase
Reversible
2-phosphoglycerate depart H+
enolate intermediate depart OH-
phosphoenolpyruvate

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10
Q

Réaction 10:

A

-Phosphorylation Enzyme: Pyruvate Kinase
1 .phosphoenolpyruvate Transformation ADP en ATP
2 . enolpyruvate
3 . pyruvate
Réaction irréversible , Formation d’ATP+++ -Fin de l’étape 2

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