inf ost lez 6 proteine e basi azotate
TRANSCRIPT
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DIGESTIONEdelle
PROTEINE
e
METABOLISMO
degli
AMINOACIDI
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DIGESTIONE
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DIGESTIONEPROTEINE
GASTRINA
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ENZIMI DIGESTIVIPROTEASI PANCREATICHE
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ENZIMI DIGESTIVIPROTEASI PANCREATICHE
Lipidi
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ENZIMI DIGESTIVIPROTEASI INTESTINALI
� AMMINOPEPTIDASI
� DIPEPTIDASI
AMMINOACIDI LIBERI
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TRASPORTO AA
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�METABOLISMO CELLULARE
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POOL AMINOACIDI
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DECARBOSSILAZIONE
QUESTA REAZIONE FORMA LE AMMINE BIOGENE (es. NEUROTRASMETTITORI)
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AMMINOACIDO/CHETOACIDO
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TRANSAMINAZIONI
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ALT AST
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DEAMINAZIONE ossidativa
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DETOSSIFICAZIONE DEL NH3
CICLO DELL’UREA (FEGATO)
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GLUTAMMINA
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DEGRADAZIONE SCHELETRI
CARBONIOSI DEGLI AA
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GLUCONEOGENESI
� SINTESI EX-NOVO DI GLUCOSIO da PRECUSORI
LATTATO
PIRUVATO
AA GLUCONEOGENETICI
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TAPPA IMPOSSIBILEACETYL –CoA
PIRUVATO
GLUCOSIO
NON SI PUO’ CONVERTIRE GLI
ACIDI GRASSI IN GLUCIDI
NEI MAMMIFERI
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2 ATP4 ATP 2 GTP
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Destino metabolico degli AA
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IMPORTANZA CICLO DI KREBS
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� METABOLISMO DEI
NUCLEOTIDI o
BASI AZOTATE
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5-FOSFORIBOSIL-1-PIROFOSFATO PRPP
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SINTESI NUCLEOTIDI PURINICI
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SINTESI NUCLEOTIDI PIRIMIDINICI
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� DIFFERENZE NELLE 2 SINTESI
PURINE PIRIMIDINE1.ANELLO COSTRUITO 1. PRIMA COSTRUZIONE
SUL RIBOSIO ATTIVATO ANELLO E POI LEGAME
(PRPP) CON PRPP
2. ESSENZIALE 2. NON ESSENZIALE ACIDO TETRAFOLICO ACIDO TETRAFOLICO
3. VIA RAMIFICATA 3. VIA UNICA
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CATABOLISMO PURINE
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CRISTALLI AC. URICO GOTTA
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CATABOLISMO PIRIMIDINE
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DIFFERENZE nella DEGRADAZIONE
PURINE PIRIMIDINE
IL PRODOTTO E’ I PRODOTTI
L’ACIDO URICO SONO CO2
(poco solubile) NH3 (solubili)