Abstract: This invention provides a series of low-copy number plasmids comprising restriction endonuclease recognition sites useful for cloning at least three different genes or operons, each flanked by a terminator sequence, the plasmids containing variants of glucose isomerase promoters for varying levels of protein expression. The materials and methods are useful for genetic engineering in microorganisms, especially where multiple genetic insertions are sought.

Abstract: Recombinant organisms are provided comprising genes encoding a glycerol-3-phosphate dehydrogenase and/or a glycerol-3-phosphatase activity useful for the production of glycerol from a variety of carbon substrates. The organisms further contain disruptions in the endogenous genes encoding proteins having glycerol kinase and glycerol dehydrogenase activities.

Abstract: Recombinant organisms are provided comprising genes encoding a glycerol-3-phosphate dehydrogenase and/or a glycerol-3-phosphatase activity useful for the production of glycerol from a variety of carbon substrates. The organisms further contain disruptions in the endogenous genes encoding proteins having glycerol kinase and glycerol dehydrogenase activities.

Abstract: The present invention provides methods to enhance production of desired products and increase the growth rate of a bacterial strain by inactivating an endogenous arcA and optionally overexpressing a ppc gene.

Abstract: The present invention provides a microorganism for the production of 1,3-propanediol from a variety of carbon sources in an organism capable of 1,3-propanediol production and comprising a) at least one gene encoding a dehydratase activity; b) at least one gene encoding a glycerol-3-phosphatase; and c) at least one gene encoding protein X. The protein X may be derived from a Klebsiella or Citrobacter gene cluster. The recombinant microorganism may further comprise d) at least one gene encoding a protein having at least 50% similarity to a protein selected from the group consisting of protein 1 (SEQ ID NO:60 or SEQ ID NO:61), of protein 2 (SEQ ID NO:62 or SEQ ID NO:63) and of protein 3 (SEQ ID NO:64 or SEQ ID NO:65) from Klebsiella or Citrobacter.

Abstract: This invention provides a series of low-copy number plasmids comprising restriction endonuclease recognition sites useful for cloning at least three different genes or operons, each flanked by a terminator sequence, the plasmids containing variants of glucose isomerase promoters for varying levels of protein expression. The materials and methods are useful for genetic engineering in microorganisms, especially where multiple genetic insertions are sought.

Abstract: The present invention provides an improved method for the production of 1,3-propanediol from a variety of carbon sources is an organism comprising DNA encoding protein X of a dehydratase or protein X in combination with at least one of protein 1, protein 2 and protein 3. The protein X may be isolated from a diol dehydratase or a glycerol dehydratase. The present invention also provides host cells comprising protein X that are capable of increased production of 1,3-propanediol.

Abstract: The present invention provides an improved method for the production of 1,3-propanediol from a variety of carbon sources in an organism capable of 1,3-propanediol production and comprising DNA encoding protein X of a microorganismal dehydratase or protein X in combination with at least one of protein 1, protein 2 and protein 3, which proteins are comparable to those encoded by orfY, orfX and orfW, respectively from a microorganismal dha regulon. The protein X may be isolated from a diol dehydratase or a glycerol dehydratase. The present invention also provides host cells comprising protein X that are capable of increased production of 1,3-propanediol.