Synthetic gene clusters
Methods for making synthetic gene clusters are described.
1. A method of altering regulation of a plurality of native bacterial genes associated with a function in a cell, comprising:
providing a bacterial cell for expressing gene products;
providing a gene cluster having a plurality of native bacterial genes having coding sequences;
modifying the gene cluster by making at least one modification in a coding region or an intergenic region;
operably linking at least one heterologous transcriptional regulatory sequence to at least one coding sequence within the modified gene cluster wherein the at least one heterologous transcriptional regulatory sequence is from the same species as the plurality of native bacterial genes; and
expressing gene products of the modified gene cluster in the bacterial cell under the control of a polypeptide that binds directly or indirectly to the at least one heterologous transcriptional regulatory sequence.
2. The method of claim 1 , wherein the gene cluster modification comprises replacing at least one native codon within one of the coding sequences to modify at least one native regulatory sequence using a synonymous codon.
3. The method of claim 2 , wherein at least two coding sequences of the plurality of native bacterial genes have at least one native codon replaced with a synonymous codon.
4. The method of claim 2 , wherein the synonymous codon is a maximal distance from a corresponding native codon.
5. The method of claim 1 , wherein the polypeptide that binds directly or indirectly to the at least one heterologous transcriptional regulatory sequence is expressed from a control expression cassette, the control expression cassette comprising a control promoter operably linked to a polynucleotide sequence encoding the polypeptide.
6. The method of claim 1 , wherein the polypeptide that binds directly or indirectly to the at least one heterologous transcriptional regulatory sequence is heterologous to the cell.
7. The method of claim 1 , wherein the polypeptide that binds directly or indirectly to the at least one heterologous transcriptional regulatory sequence is from the same species as the plurality of native bacterial genes.
8. The method of claim 1 , further comprising: detecting the magnitude of gene expression of the expressed gene products by computation.
9. The method of claim 8 , wherein the computation comprises a numerical optimization algorithm.
10. The method of claim 1 , wherein modifying the gene cluster comprises replacing at least one intergenic region to remove at least one native regulatory sequence selected from the group consisting of a ribosome binding site, a terminator, and a promoter.
11. The method of claim 1 , wherein modifying the gene cluster comprises: altering at least one intergenic region within the gene cluster to modify a native regulatory sequence.
12. The method of claim 11 , further comprising: identifying the native regulatory sequence using computation.
13. The method of claim 11 , wherein the polypeptide that binds directly or indirectly to the at least one heterologous transcriptional regulatory sequence is from the same species as the plurality of native bacterial genes.
14. The method of claim 11 , wherein the polypeptide that binds directly or indirectly to the at least one heterologous transcriptional regulatory sequence is expressed from a control expression cassette, the control expression cassette comprising a control promoter operably linked to a polynucleotide sequence encoding the polypeptide.
15. The method of claim 11 , further comprising: detecting the magnitude of gene expression of the expressed gene products by computation.