Sintesis De Purinas Flashcards

1
Q

En donde se hace la purina

A

Encima de el azúcar

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2
Q

Primer paso

A

La ribosa 5-P (azúcar) se pegan dos fosfatos más del ATP y queda fosforibocilpirofosfato (PRPP) y AMP
La enzima que regula este paso es la PRPP sintetasa

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3
Q

Segundo paso

A

La Glutamina da el primer amino de la purina y se convierte en glutamato y el intermediario es fosforibosil amina

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4
Q

Tercer paso

A

La glicina completa da dos C y un amino y forma GAR (gasta ATP)

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5
Q

Tamaño de purina

A

9 átomos

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6
Q

Cuarto paso

A

Folato reducido da un C y forma FGAR

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7
Q

Quinto paso

A

Glutamina da un amino y se vuelve glutamato (Consume ATP) y forma FGAM
Se cierra el anillo de los 5 átomos.

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8
Q

Sexto paso

A

Se toma un CO2 del medio (se consume un ATP) y forma 5-aminoamidazole-4-carboxilato ribonculeotido.

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9
Q

Séptimo paso

A

El aspartato da un amino y forma Fumarato (se consume ATP) y forma AICAR.

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10
Q

Octavo paso

A

Folato reducido da C forma FAICAR

Se cierra el anillo de 6 C

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11
Q

Que se necesita para hacer una purina

A
Aspartato
Glicina
Formato
Glutamino
CO2
ATP
Ribosa-5-P
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12
Q

Falta de vitamina B12

A

Falta de Folato

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