Desaminación Flashcards

1
Q

Desaminación

A

Grupo amino de glutamato se libera como amonio
Por glutamato deshidrogenasa

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2
Q

Función catabólica de glutamato deshidrogenasa

A

Separa glutamato
Forma a-Cetoglutarato
Forma amonio
Con NAD+

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3
Q

Función anabólica de glutamato deshidrogenasa

A

Sintetiza glutamato
Baja concentraciones de amonio
Necesita NADPH

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4
Q

Regulación de glutamato deshidrogenasa

A

GTP inhibe
ADP activa

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5
Q

Ruta alterna de desaminación

A

En peroxisomas
Por oxidasas de aminoácidos
Debe estar activo sistema de catalasas para degradar peróxido de hidrogeno resultante

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6
Q

Oxidasa de aminoácidos

A

Quitan grupo amino
Forman a-cetoácidos
Forman peróxido de hidrogeno

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7
Q

Transporte de amoniaco al hígado

A

Glutamato
Glutamina
Alanina

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8
Q

Glutamato

A

Mayor transportador de amoniaco

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9
Q

Glutamina

A

Glutamano+Amonio
(transporta 2 amonios)
Principal transportador de amoniaco en cerebro
Se dirige a hígado o riñón
Síntesis por glutamina sintasa
Degradación por glutaminasa

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10
Q

Alanina

A

Principal transportador de amoniaco en músculos
Va a hígado
Glutamato + piruvato = alanina + a-cetoglutarato (ALT)

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