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Biosynthese von Estradiol OH O H Thomas Albuzat 23. Juni 2003

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Page 1: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von EstradiolOH

OH

Thomas Albuzat23. Juni 2003

Page 2: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

Ausgangsstoff:

Acetyl-CoA ( z.B. aus Glucose-Abbau )

Acetyl-CoA Acetyl-CoA

Thiolase

(Acetyl-CoA-acetyltransferase)

Acetoacetyl-CoA

+SCoA

O

SCoA

O

O O

SCoA

H SCoA

Page 3: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

Hydroxymethyl-CoA-synthase

(HMG-CoA-synthase)SCoA

O

O O

SCoA

H SCoA

SCoA

OOH

OO

H2O +

β-Hydroxy- β-methylglutaryl-Co-A = HMG-CoA

Page 4: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

2 NADPH 2 NADP+

SCoA

OOH

OO

OH

OO

OH

OH

OO

O P OO

O

β-Hydroxy- β-methylglutaryl-Co-A MevalonatCoA

HMG-CoA-reduktase

ATP ADP

Mevalonatkinase

5-Phosphomevalonat

Page 5: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

ATP ADP

OH

OO

O P OO

O

OH

OO

O P OO

OP OO

O

O P OO

OP OO

O

ATP ADP +CO2 + H2O

5-Phosphomevalonat 5-Pyrophosphomevalonat

Phosphomevalonatkinase

PyrophosphomevalonatdecarboxylaseIsopentenylpyrophosphat

Page 6: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

+

Isopentenyl-pyrophosphat-isomerase

Isopentenylpyrophosphat Dimethylallylpyrophosphat

PP

Prenyltransferase

Geranylpyrophosphat

O P OO

OP OO

O

O P OO

OP OO

O

O P P O P P

O P P

Page 7: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

O P P

O P P

O P P

Prenyltransferase

PPFarnesylpyrophosphat

Geranylpyrophosphat Isopentenylpyrophosphat

+

Page 8: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

O P P OPP

NADPH NADP+ + 2 PP

Squalen-Synthase

Farnesylpyrophosphat

Farnesylpyrophosphat

Squalen

Page 9: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

Squalen

O

NADPH + O2 NADP+ + H2O

SqualenepoxidaseSqualenepoxid

Squalen

Page 10: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

OO

Enz HSqualenoxidocyclase

Squalenepoxid

C+

HH

HOHH

HOH

H

H

- H+

LanosterinProtosterol-Kation

Page 11: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

HOH

H

H

Lanosterin

Demethylierung, Sättigung der Seitenkette, Wanderung der Doppelbindung im Ring B

A B

C D

Sterangerüst

OH Cholesterin

Page 12: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

O

OHOH

Desmolase

CholesterinPregnenolon

Desmolase : Cholesterol-Side-Chain-Cleavage Enzym

Page 13: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

O

O

Oxidation der OH-Gruppe

O

OH

Pregnenolon Progesteron

O

O

OH

Hydroxylase

17-Hydroxy-Progesteron

Page 14: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

O

O

OH

O

O

Acetatabspaltung

Androstendion17-Hydroxy-Progesteron

O

OH

Reduktion

Testosteron

Page 15: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol

O

OH

OH

OH+ 4 H2O

+ HCOOH

3 NADPH + 3O2

Aromatase(Estrogensynthetase)

TestosteronEstradiol

Page 16: Biosynthese von Estradiol - thomas-albuzat.de fileBiosynthese von Estradiol 2 NADPH 2 NADP+ SCoA O HO O O HO O O OH HO O O O P O O O β-Hydroxy- β-methylglutaryl-Co-A CoA Mevalonat

Biosynthese von Estradiol