Abstract: Provided herein are improved compositions and methods for the increased production of isoprene. Also provided herein are improved compositions and methods for the increased production of heterologous polypeptides capable of biological activity.

Abstract: The invention features methods for producing isoprene from cultured cells. The invention also provides compositions that include these cultured cells. The invention provides isoprene compositions, such as compositions with increased amount of isoprene or increased purity. Additionally, the invention provides methods of producing isoprene by culturing cells under conditions suitable for isoprene production while maintaining cell viability and/or metabolic activity.

Abstract: The present invention provides methods and compositions comprising at least one isoprene synthase enzyme with improved catalytic activity and/or solubility. In particular, the present invention provides variant plant isoprene synthases for increased isoprene production in microbial host cells. Biosynthetically produced isoprene of the present invention finds use in the manufacture of rubber and elastomers.

Abstract: Provided herein are improved compositions and methods for the increased production of isoprene. Also provided herein are improved compositions and methods for the increased production of heterologous polypeptides capable of biological activity.

Abstract: This invention relates to a recombinant microorganism capable of producing isoprene and isoprene production with the use of such recombinant microorganism with good efficiency. In this invention, the acetoacetyl-CoA synthase gene encoding an enzyme capable of synthesizing acetoacetyl-CoA from malonyl-CoA and acetyl-CoA and one or more genes involved in isoprene biosynthesis that enables synthesis of isoprene from acetoacetyl-CoA are introduced into a host microorganism.

Abstract: The invention provides for methods for the production of mevalonate, isoprene, isoprenoid precursor molecules, and/or isoprenoids in cells via the heterologous expression of phosphoketolase enzymes.

Abstract: The invention features methods for producing isoprene from cultured cells. The invention also provides compositions that include these cultured cells.

Abstract: The invention features methods for producing isoprene from cultured cells. The invention also provides compositions that include these cultured cells.

Abstract: The invention features compositions and methods for the increased production of mevalonate, isoprene, isoprenoid precursor molecules, and/or isoprenoids in microorganisms via the heterologous expression of the mvaE and mvaS genes from the organisms Listeria grayi DSM 20601, Enterococcus faecium, Enterococcus gallinarum EG2, and Enterococcus casseliflavus.

Abstract: The invention features compositions and methods for the increased production of mevalonate, isoprene, isoprenoid precursor molecules, and/or isoprenoids in microorganisms by engineering a microorganism for increased carbon flux towards mevalonate production in the following enzymatic pathways: (a) citrate synthase, (b) phosphotransacetylase, (c) acetate kinase, (d) lactate dehydrogenase, (e) malic enzyme, and (f) pyruvate dehydrogenase such that one of more of the enzyme activity is modulated. In addition, production of mevalonate, isoprene, isoprenoid precursor molecules, and/or isoprenoids can be further enhanced by the heterologous expression of the mvaE and mvaS genes (such as, but not limited to, mvaE and mvaS genes from the organisms Listeria grayi DSM 20601, Enterococcus faecium, Enterococcus gallinarum EG2, and Enterococcus casseliflavus).

Abstract: The invention features methods for producing isoprene from cultured cells. The invention also provides compositions that include these cultured cells.

Abstract: The present invention provides methods and compositions comprising at least one isoprene synthase enzyme with improved catalytic activity and/or solubility. In particular, the present invention provides variant plant isoprene synthases for increased isoprene production in microbial host cells. Biosynthetically produced isoprene of the present invention finds use in the manufacture of rubber and elastomers.

Abstract: Certain aspects of this disclosure relate to a method of amplifying a genomic locus. In certain embodiments, the method may comprise: a) contacting a population of bacterial host cells with an inhibitor of an essential enzyme, where the bacterial host cells comprise a genomic locus of the structure: A1-P-M-A2, where A1 and A2 are direct repeats, P comprises a coding sequence for a polypeptide, and M comprises a coding sequence for the essential enzyme; and b) selecting for cells that are resistant to the inhibitor; wherein cells that are resistant to the inhibitor have multiple copies of the amplification unit.

Abstract: Provided herein are improved compositions and methods for the increased production of isoprene. Also provided herein are improved compositions and methods for the increased production of heterologous polypeptides capable of biological activity.

Abstract: The invention features methods producing isoprene and a co-product, such as ethanol, 1,3-propanediol, or hydrogen from cultured cells. The invention also provides compositions that include these cultured cells. The invention provides compositions comprising isoprene and ethanol, isoprene and 1,3-propanediol, and isoprene and hydrogen. Additionally, the invention provides methods of co-producing isoprene and ethanol, isoprene and 1,3-propanediol, and isoprene and hydrogen by culturing cells under conditions suitable for co-production of isoprene and ethanol, isoprene and 1,3-propanediol, and isoprene and hydrogen.

Abstract: The invention features methods for producing isoprene from cultured cells. The invention also provides compositions that include these cultured cells. The invention provides isoprene compositions, such as compositions with increased amount of isoprene or increased purity. Additionally, the invention provides methods of producing isoprene by culturing cells under conditions suitable for isoprene production while maintaining cell viability and/or metabolic activity.

Abstract: The present invention provides methods and compositions comprising at least one isoprene synthase enzyme with improved catalytic activity and/or solubility. In particular, the present invention provides variant plant isoprene synthases for increased isoprene production in microbial host cells. Biosynthetically produced isoprene of the present invention finds use in the manufacture of rubber and elastomers.