Biosynthesis2008

Biosynthesis2008 - CHEM 0320 University of Pittsburgh Page...

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CHEM 0320 University of Pittsburgh – Page 1/7 Introduction to the Biosynthesis of Lipids. C. S. Wilcox University of Pittsburgh CHEM 0320 Lipids are organic soluble components of living systems. Examples include fats, waxes, prostaglandins, steroid hormones, cholesterol, several vitamins, and terpenes. THE NATURAL REAGENTS USED FOR BIOSYNTHESIS. I. ATP (adenosine triphosphate) and ADP (adenosine diphosphate) are biological reagents needed for these biosyntheses. ATP and ADP are coenzymes. They work with enzymes (proteins that facilitate chemical reactions) to catalyze chemical reactions. N N N N NH 2 O OH OH O P O- O O P -O O- O O P -O O- O N N N N NH 2 O OH OH O P O- O O P O- O ADP ATP a. ATP is used as a source of energy to drive chemical reactions. b. ATP is also used to activate hydroxyl groups to make them better leaving groups or to make them easier to handle inside the cell. c. ATP has many other roles in cellular chemistry. O P -O O- O N N N N NH 2 O OH OH O P O- O O P O- O -O N N N N NH 2 O OH OH O P O- O O P O- O OR P -O O- O ROH ATP ADP + H + +
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CHEM 0320 University of Pittsburgh – Page 2/7 II. Another important biological reagent and coenzyme is NAD (also symbolized as NAD+). a. NAD acts to accept two hydrogen atoms, thus it is a oxidizing agent. When NAD gains two electrons and two protons it forms NADH . b. NADH can give these electrons back. In that way NADH can act as a reducing agent. III.
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This note was uploaded on 04/29/2008 for the course CHEM 320 taught by Professor Koide during the Spring '08 term at Pittsburgh.

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Biosynthesis2008 - CHEM 0320 University of Pittsburgh Page...

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