Abstract: The present invention relates to the cell-based production of bacterial nonulosonates and their biosynthetic precursors. Specifically, the present invention provides recombinant cells for the production of pseudaminic acid, legionaminic acid, UDP-2,4-diacetamido-2,4,6-trideoxy-?-L-altropyranose, and UDP-2,4-diacetamido-2,4,6-trideoxy-?-D-glucopyranose. Methods for producing the sugars are also provided.

Abstract: A synthetic peptide includes an amino acid sequence that: has 70-75%, 75-80%, 80-85%, 85-90%, 90-95% or 95-100% homology with an RpoN box of Region III of an RpoN protein; and binds specifically to a ?24, ?12, or ?24/?12 site(s) of an RpoN promoter. The synthetic peptide is effective for repressing transcription and/or gene expression from a binding site of interest, and the binding site of interest is an RpoN binding site or a cryptic promoter upstream of an RpoN binding site.

Abstract: The present invention relates to the cell-based production of bacterial nonulosonates and their biosynthetic precursors. Specifically, the present invention provides recombinant cells for the production of pseudaminic acid, legionaminic acid, UDP-2,4-diacetamido-2,4,6-trideoxy-?-L-altropyranose, and UDP-2,4-diacetamido-2,4,6-trideoxy-?-D-glucopyranose. Methods for producing the sugars are also provided.

Abstract: A synthetic peptide includes an amino acid sequence that: has 70-75%, 75-80%, 80-85%, 85-90%, 90-95% or 95-100% homology with an RpoN box of Region III of an RpoN protein; and binds specifically to a ?24, ?12, or ?24/?12 site(s) of an RpoN promoter. The synthetic peptide is effective for repressing transcription and/or gene expression from a binding site of interest, and the binding site of interest is an RpoN binding site or a cryptic promoter upstream of an RpoN binding site.

Abstract: The present invention relates to the cell-based production of bacterial nonulosonates and their biosynthetic precursors. Specifically, the present invention provides recombinant cells for the production of pseudaminic acid, legionaminic acid, UDP-2,4-diacetamido-2,4,6-trideoxy-?-L-altropyranose, and UDP-2,4-diacetamido-2,4,6-trideoxy-?-D-glucopyranose. Methods for producing the sugars are also provided.

Abstract: The present invention relates to, inter alia, a method for repressing transcription and/or gene expression from RpoN binding sites (or promoters) or cryptic promoters upstream of RpoN binding sites. The method comprises providing an agent that specifically and selectively binds to RpoN promoter sequences to inhibit or repress the expression of genes downstream of that promoter; and contacting the RpoN promoter with the agent. Agents for repressing transcription and/or gene expression from RpoN promoters are also provided. The agent can be a composition that binds specifically to the ?24, ?12, or ?24/?12 site(s) for RpoN promoter interference. Synthetic peptides, vectors, and host cells are also provided.

Abstract: A metabolically engineered E. coli strain which produces sialic acid and a method of making said strain. In the engineered E. coli cells, the nanT (sialic acid transporter) and nanA (sialic acid adolase) genes are inactivated, and the neuC and neuB genes of sialic acid biosynthesis in Neisseria meningitidis group B are introduced and overexpressed in the nanT? nanA? E. coli cell. In addition, the glucosamine synthase gene, glmS, of E. coli is co-overexpressed with neuB and neuC.

Abstract: The present invention relates to the the cell-based production of bacterial nonulosonates and their biosynthetic precursors. Specifically, the present invention provides recombinant cells for the production of pseudaminic acid, legionaminic acid, UDP-2,4-diacetamido-2,4,6-trideoxy-?-L-altropyranose, and UDP-2,4-diacetamido-2,4,6-trideoxy-?-D-glucopyranose. Methods for producing the sugars are also provided.

Abstract: The present invention relates to the cell-based production of bacterial nonulosonates and their biosynthetic precursors. Specifically, the present invention provides recombinant cells for the production of pseudaminic acid, legionaminic acid, UDP-2,4-diacetamido-2,4,6-trideoxy-?-L-altropyranose, and UDP-2,4-diacetamido-2,4,6-trideoxy-?-D-glucopyranose. Methods for producing the sugars are also provided.

Abstract: A metabolically engineered E. coli strain which produces sialic acid and a method of making said strain. In the engineered E. coli cells, the nanT (sialic acid transporter) and nanA (sialic acid adolase) genes are inactivated, and the neuC and neuB genes of sialic acid biosynthesis in Neisseria meningitidis group B are introduced and overexpressed in the nanT? nanA? E. coli cell. In addition, the glucosamine synthase gene, glmS, of E. coli is co-overexpressed with neuB and neuC.

Abstract: The present invention relates to, inter alia, a method for repressing transcription and/or gene expression from RpoN binding sites (or promoters) or cryptic promoters upstream of RpoN binding sites. The method comprises providing an agent that specifically and selectively binds to RpoN promoter sequences to inhibit or repress the expression of genes downstream of that promoter; and contacting the RpoN promoter with the agent. Agents for repressing transcription and/or gene expression from RpoN promoters are also provided. The agent can be a composition that binds specifically to the ?24, ?12, or ?24/?12 site(s) for RpoN promoter interference. Synthetic peptides, vectors, and host cells are also provided.

Abstract: A metabolically engineered E. coli strain which produces sialic acid and a method of making said strain. In the engineered E. coli cells, the nanT (sialic acid transporter) and nanA (sialic acid adolase) genes are inactivated, and the neuC and neuB genes of sialic acid biosynthesis in Neisseria meningitidis group B are introduced and overexpressed in the nanT? nanA? E. coli cell. In addition, the glucosamine synthase gene, glmS, of E. coli is co-overexpressed with neuB and neuC.

Abstract: The present invention relates to the cell-based production of bacterial nonulosonates and their biosynthetic precursors. Specifically, the present invention provides recombinant cells for the production of pseudaminic acid, legionaminic acid, UDP-2,4-diacetamido-2,4,6-trideoxy-?-L-altropyranose, and UDP-2,4-diacetamido-2,4,6-trideoxy-?-D-glucopyranose. Methods for producing the sugars are also provided.

Abstract: A metabolically engineered E. coli strain which produces sialic acid and a method of making said strain. In the engineered E. coli cells, the nanT (sialic acid transporter) and nanA (sialic acid adolase) genes are inactivated, and the neuC and neuB genes of sialic acid biosynthesis in Neisseria meningitidis group B are introduced and overexpressed in the nanT? nanA? E. coli cell. In addition, the glucosamine synthase gene, glmS, of E. coli is co-overexpressed with neuB and neuC.