Biosynthesis of terpenes

terpenes synthesis pathway

1. BY SHRUSHTI JOSHI 164551 BIOSYNTHESIS OF TERPENES

2. Terpenes are a large and diverse class of secondary metabolite produced by plants. Terpene , a class of hydrocarbons occurring widely in plants and animals and empirically regarded as built up from isoprene , a hydrocarbon consisting of five carbon atoms attached to eight hydrogen atoms (C 5 H 8 ). The term is often extended to the terpenoids , which are oxygenated derivatives of these hydrocarbons. INTRODUCTION

3. The name " terpene " is derived from the german word “ terpentine “ Kekule in 1 866 first termed terpenes . WORD ORIGIN

4. Terpenes are biosynthesized from primary metabolite in at least 2 ways Mevalonate pathway Methylerythritol phosphate pathway BIOSYNTHESIS

5. Discovered by Lynen and Bloch in 1950. Takes place in the cytosol . Rate limiting enzyme in this pathway is HMG- CoA reductase . MEVALONATE PATHWAY

6. Discovered by Lichtenthaler in 1999 Takes place in leucoplast. Rate limiting enzyme is DXP reductase . METHYLERYTHRITOL PHOSPHATE PATHWAY

7. REPETATIVE ADDITION OF IPP

8. THANK YOU