title: Quantitative analysis of isoprenoid diphosphate intermediates in recombinant and wild-type Escherichia coli strains.
abstract: In biotechnology, the heterologous biosynthesis of isoprenoid compounds in Escherichia coli is a field of great interest and growth. In order to achieve higher isoprenoid yields in heterologous E. coli strains, it is necessary to quantify the pathway intermediates and adjust gene expression. In this study, we developed a precise and sensitive nonradioactive method for the simultaneous quantification of the isoprenoid precursors farnesyl diphosphate (FPP) and geranylgeranyl diphosphate (GGPP) in recombinant and wild-type E. coli cells. The method is based on the dephosphorylation of FPP and GGPP into the respective alcohols and involves their in situ extraction followed by separation and detection using gas chromatography-mass spectrometry. The integration of a geranylgeranyl diphosphate synthase gene into the E. coli chromosome leads to the accumulation of GGPP, generating quantities as high as those achieved with a multicopy expression vector.
authors.affiliation: Institute of Biochemical Engineering, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Vallon
authors.forename: S
authors.initials: S
authors.lastname: Ghanegaonkar
authors.forename: O
authors.initials: O
authors.lastname: Vielhauer
authors.forename: A
authors.initials: A
authors.lastname: Müller
authors.forename: C
authors.initials: C
authors.lastname: Albermann
authors.forename: G
authors.initials: G
authors.lastname: Sprenger
authors.forename: M
authors.initials: M
authors.lastname: Reuss
authors.forename: K
authors.initials: K
authors.lastname: Lemuth
mesh_terms: D000438:Alcohols / Q000378:metabolism; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology; D004926:Escherichia coli / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D005285:Fermentation; D015870:Gene Expression; D005818:Genetic Engineering; D011106:Polyisoprenyl Phosphates / Q000032:analysis* / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D000438:Alcohols; D011106:Polyisoprenyl Phosphates