Transfer of an Entire Biosynthetic Pathway,Clustering of Genes,Actinorhodin,Erythromycin,Streptomyces Licidens,Antibiotics,Penicillin V

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Metabolic Engineering and Metabolomics Metabolic Engineering and Metabolomics Introduction Cloning and Expression of Heterologous Genes Completion of Partial Pathways giving new Products Transfer of an Entire Biosynthetic Pathway Creating new Products and new Reactants Altering Nutrient uptake and Metabolite Transfer of Promising Natural Motifs Redirecting Metabolite Flow Desensitizing Feedback Inhibition Increased Threonine in Bacteria Increased Lysine Content in Crop Plants Elevation of the Activity of rate Limiting Enzymes Alteration in Protein Processing Pathway Reduction of Competition for Limited Resources Modification of Metabolic Regulation Molecular Breeding of Biosynthetic Pathways

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Transfer of an entire biosynthetic pathway
The transfer of an entire biosynthetic pathway is facilitated by the clustering of genes involved. Following are some examples: (i) Genes for biosynthesis of antibiotics actinorhodin anderythromycin A were transferred to Streptomyces lividens, separately from S. coelicolor and S. erythreus respectively; similarly genes for biosynthesis of the antibiotic, penicillin V were transferred from Penicillium chrysogenum to Neurospora crassa and Aspergillus niger. In each case the new host synthesized the new product using genes for entire biosynthetic pathway transferred from original species.

(ii) Genes for biosynthesis of a biodegradable polyester polyhydroxybutyrate (PHB) were transferred from Alcaligenes eutrophus to E. coli. This recombinant E. coli was shown to produce PHB concentrations approaching 50% of the dry cell weight, when nitrogen source is depleted. (iii) It was possible to construct bacterial strains (having as many as five degradation pathways derived from three organisms), which could simultaneously cause degradation of mixed substrates involving biochemical and metabolic complexities. (iv) Genes for tryptophan and threonine biosynthetic pathways could be transferred to E. coli, which could be used as amino acid producers.

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Carotenoid Biosynthesis Biosynthesis of Novel Carotenoids Biosynthesis of Acyclic and Cyclic Carotenoids Metabolic Engineering for PHAs Metabolic Engineering for Alkaloid Biosynthesis Pathway Analysis for Metabolic Engineering Metabolic Control Analysis (MCA) for Metabolic Engineering Metabolomics and Metabolic Engineering MS,NMR and Metabolomic Profiling Metabolomic Control Analysis and FANCY Limitations in Metabolic Engineering Due to Technology Metabolic Control Theory and Metabolic Engineering Limitations in Metabolic Engineering Due to Network Rigidity Identification and Classification of Principal Nodes Assessment of Nodal Rigidity and its Response to Metabolic Engineering