Transaminación Flashcards

1
Q

Aminoácidos

A

Transportan nitrógeno
L-isomería para ser metabolizados

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2
Q

Sistema proteosomico de ubiquitina

A

Degradación por proteosomas
Cadenas de 6-10 de ubiquitina para marcar proteínas
Se obtiene aminoácidos libres
Dependiente de ATP

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3
Q

Zimógenos

A

proteínas cataliticamente inactivas

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4
Q

Pepsinógenos

A

Forma activa
Degrada proteínas en péptidos simples

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5
Q

Señalización hormonas

A

De intestino delgado para estimular páncreas
Secretina
Colecistocinina

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6
Q

Secretina

A

Manda bicarbonato
Neutralizar pH
Enzimas pancreáticas funcionan en pH neutras

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7
Q

Colecistocinina

A

Libera zimógenos
Tripsinógeno Quimiotrisinogeno
Proelastasa
Procarboxipeptidasas

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8
Q

Enteropeptidasa

A

Activa zimógenos
Tripsinógeno = tripsina
Quimiotrisinogeno = quimiotripsina
Proelastasa = elastasa
Procarboxipeptidasas = carboxipeptidasa

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9
Q

Transaminación

A

Canalización de grupos amino a formación de glutamato
Aminoácido dona grupo amino a a-cetoácido y formar nuevo aminoácido

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10
Q

Aminotransferasas

A

Enzima de transaminación
Son especificas de aminoácido que done y del a-cetoácido que reciba
Necesita vitamina B6 y piridoxal fosfato (PLP)

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11
Q

Principales organos en equilibrio de nitrogeno

A

hígado, riñón, músculo y cerebro
tienen alta concentración de aminotransferasas

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12
Q

a-cetoácido que recibe grupo amino más común

A

a-cetoglutarato

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13
Q

Intermediarios entre ácido citrico y aminoácidos

A

A-cetoglutarato/glutamato
Oxalacetato/aspartato (AST)
Piruvato/alanina (ALT)

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14
Q

Proteínas endogenas

A

Son producidas internamente por el cuerpo a partir de los aminoácidos disponibles

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