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Isolation and functional analysis of two Cistus creticus cDNAs encoding geranylgeranyl diphosphate synthase
Irene Pateraki1, Angelos K Kanellis
1Group of Biotechnology of Pharmaceutical Plants, Laboratory of Pharmacognosy, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece.
Phytochemistry
|April 12, 2008
Summary
Researchers cloned and characterized two geranylgeranyl diphosphate synthase (GGDPS) genes from Cistus creticus. These genes are crucial for producing diterpenes with potential medicinal properties, showing regulated expression in plant tissues.
Area of Science:
- Plant biochemistry
- Molecular biology
- Medicinal plant research
Background:
- Cistus creticus produces ladanum resin containing diterpenes with significant biological activities.
- These diterpenes possess antibacterial, antifungal, cytotoxic, and cytostatic properties.
- Understanding diterpene biosynthesis is key for potential pharmaceutical applications.
Purpose of the Study:
- To clone and functionally characterize geranylgeranyl diphosphate synthase (GGDPS) genes in Cistus creticus.
- To investigate the expression profile of GGDPS genes at both the gene and protein levels.
- To elucidate the molecular basis of terpenoid biosynthesis in C. creticus.
Main Methods:
- Cloning of two full-length C. creticus GGDPS cDNAs (CcGGDPS1 and CcGGDPS2).
- Functional characterization using a heterologous yeast expression system.
- Gene and protein expression analysis including tissue-specific and developmental profiling.
Main Results:
- Successful cloning and functional expression of CcGGDPS1 and CcGGDPS2 in yeast, confirming GGDPS activity.
- Demonstrated differential gene and protein expression patterns for CcGGDPS1 and CcGGDPS2.
- Maximum GGDPS expression observed in glandular trichomes and young leaves (0.5-1.0cm).
Conclusions:
- This study provides the first molecular insights into terpenoid biosynthesis in C. creticus.
- The identified GGDPS enzymes are critical for diterpene production in this species.
- Tissue-specific expression suggests a targeted role in secondary metabolite production within C. creticus.
