摘要:
A method is disclosed for restoring a Glu+ phenotype to a PTS−/Glu− bacterial cell which was originally capable of utilizing a phosphotransferase transport system (PTS) for carbohydrate transport. Bacterial cells comprising the Glu+ phenotype have modified endogenous chromosomal regulatory regions which are operably linked to polynucleotides encoding galactose permeases and glucokinases.
摘要:
The present invention relates to a method of creating DNA libraries that include an artificial promoter library and/or a modified ribosome binding site library and transforming bacterial host cells with the library to obtain a population of bacterial clones having a range of expression levels for a chromosomal gene of interest.
摘要:
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.
摘要:
A method is disclosed for restoring a Glu+ phenotype to a PTS−/Glu− bacterial cell which was originally capable of utilizing a phosphotransferase transport system (PTS) for carbohydrate transport. Bacterial cells comprising the Glu+ phenotype have modified endogenous chromosomal regulatory regions which are operably linked to polynucleotides encoding galactose permeases and glucokinases.
摘要:
A method is disclosed for restoring a Glu+ phenotype to a PTS−/Glu− bacterial cell which was originally capable of utilizing a phosphotransferase transport system (PTS) for carbohydrate transport. Bacterial cells comprising the Glu+ phenotype have modified endogenous chromosomal regulatory regions which are operably linked to polynucleotides encoding galactose permeases and glucokinases.
摘要:
The present invention relates to a method of creating DNA libraries that include an artificial promoter library and/or a modified ribosome binding site library and transforming bacterial host cells with the library to obtain a population of bacterial clones having a range of expression levels for a chromosomal gene of interest.
摘要:
A method is disclosed for restoring a Glu+ phenotype to a PTS−/Glu− bacterial cell which was originally capable of utilizing a phosphotransferase transport system (PTS) for carbohydrate transport. Bacterial cells comprising the Glu+ phenotype have modified endogenous chromosomal regulatory regions which are operably linked to polynucleotides encoding galactose permeases and glucokinases.
摘要:
A method is disclosed for restoring a Glu+ phenotype to a PTS−/Glu− bacterial cell which was originally capable of utilizing a phosphotransferase transport system (PTS) for carbohydrate transport. Bacterial cells comprising the Glu+ phenotype have modified endogenous chromosomal regulatory regions which are operably linked to polynucleotides encoding galactose permeases and glucokinases.
摘要:
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.
摘要:
The present invention provides a microorganism useful for biologically producing 1,3-propanediol from a fermentable carbon source at higher yield than was previously known. The complexity of the cofactor requirements necessitates the use of a whole cell catalyst for an industrial process that utilizes this reaction sequence to produce 1,3-propanediol. The invention provides a microorganism with disruptions in specified genes and alterations in the expression levels of specified genes that is useful in a higher yielding process to produce 1,3-propanediol.