Descarboxilación del piruvato Flashcards

1
Q

generalidades de la descarboxilacion del piruvato

A

EL COMPLEJO DE LA PIRUVATO DESHIDROGENASA (PDC) OXIDA EL
PIRUVATO A ACETIL COA Y COMO RESULTADO DE ELLO SE ENLAZAN LA GLUCÓLISIS Y EL CICLO DE
KREBS.

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2
Q

cuales son las tres enzimas del complejo piruvato deshidrogenasa

A

-piruvato descarboxilasa/deshidrogenasa
-dihidrolipoil transacetilasa
-dihidrolipoil deshidrogenasa

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3
Q

grupo prostetico de piruvato descarboxilasa/deshidrogenasa

A

TTP (tiamina prirofosfato)

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4
Q

grupo prostético de dihidrolipoil transacetilasa

A

lipoamida (grupos tiol)
CoA

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5
Q

grupo pratetico de dihidrolipoil deshidrogenasa

A

FAD
NAD

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6
Q

cuales son los cofactores de sustrato

A

NAD y Coenzima A (CoA)

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7
Q

Productos de la descarboxilacion

A

Acetil CoA
CO2
NADH
y 2.5 ATP

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8
Q

Enzima que inhibe al complejo

A

-Piruvato deshidrogenasa cinasa–> inhibe al complefo fosforilando

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9
Q

Enzima que activa al commplejo

A

Piruvato deshidrogenasa fosfatasa—> activa al complejo desfosforilando

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10
Q

en la reaccion piruvato —-> acetil coa, cual es la enzima y que necesita para funcionar?

A

es la piruvato deshidrogenasa y necesita
tiamina
lipoato
FAD
CoA
en la reaccion se libera NADH

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11
Q

activadores de la piruvato deshidrogenasa

A

insulina
calcio
ADP
NAD
CoA

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12
Q

inhibidores de la piruvato deshidrogenasa

A

Acetil coA
ATP
NADH
Acidos grasos
Arsenico—>E2

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