Methods for generating and screening novel metabolic pathways
First Claim
1. A mobilizable combinatorial gene expression library, comprising a pool of expression constructs, each expression construct comprising a shuttle vector that replicates in different species or strains of host cell, said shuttle vector containing one or more cDNA or genomic DNA fragments, wherein the cDNA or genomic DNA fragments in the pool of expression constructs are derived from a plurality of species of donor organisms, and wherein the cDNA or genomic DNA fragments are each operably-associated with one or more regulatory regions that drives expression of genes encoded by the cDNA or genomic DNA fragments in an appropriate host organism.
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Abstract
The present invention relates to a novel drug discovery system for generating and screening molecular diversity. The system provides methods for mixing and cloning genetic materials from a plurality of species of organisms in combinatorial gene expression libraries to generate novel metabolic pathways and classes of compounds. The system also provides mobilizable combinatorial gene expression libraries that can be transferred from one species of host organism to another for expression. Also provided are specialized cloning vectors for making mobilizable gene expression libraries. The system also involves methods for pre-screening or identifying for host organisms containing a library that are capable of generating such novel pathways and compounds.
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Citations
25 Claims
- 1. A mobilizable combinatorial gene expression library, comprising a pool of expression constructs, each expression construct comprising a shuttle vector that replicates in different species or strains of host cell, said shuttle vector containing one or more cDNA or genomic DNA fragments, wherein the cDNA or genomic DNA fragments in the pool of expression constructs are derived from a plurality of species of donor organisms, and wherein the cDNA or genomic DNA fragments are each operably-associated with one or more regulatory regions that drives expression of genes encoded by the cDNA or genomic DNA fragments in an appropriate host organism.
- 13. A method for making a mobilizable combinatorial gene expression library, comprising ligating a shuttle vector that replicates in different species or strains of host cell, to one or more cDNA or genomic DNA fragments to form a pool of expression constructs, wherein said cDNA or genomic DNA fragments in the pool of expression constructs are obtained from a plurality of species of donor organisms, and wherein the genes contained in the cDNA or genomic DNA fragments are each operably-associated with their native or exogenous regulatory regions which drive expression of the genes in an appropriate host cell.
- 18. A method for making a combinatorial gene expression library comprising transferring a pool of expression constructs in a species of host organism to another species or strain of host organism, said expression construct comprising a shuttle vector that replicates in different species or strains of host cell, said shuttle vector comprising one or more cDNA or genomic DNA fragments, wherein the cDNA or genomic DNA fragments in the pool of expression constructs are obtained from a plurality of species of donor organisms, and wherein the genes contained in the cDNA or genomic DNA fragments are each operably-associated with their native or exogenous regulatory regions which drive expression of the genes in an appropriate host cell.
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21. A method for making a biased combinatorial gene expression library, comprising ligating a DNA vector to one or more cDNA or genomic DNA fragments to generate a library of expression constructs, wherein the cDNA or genomic DNA fragments in the library are obtained from a plurality of species of donor organisms and are selected for a specific property, and wherein genes contained in the cDNA or genomic DNA fragments are each operably-associated with their native or exogenous regulatory regions which drive expression of the genes in an appropriate host cell.
Specification