Abstract:
:Combining the isochorismate synthase EntC and the chorismatase FkbO in a sequential enzyme cascade provides a useful system for the biocatalytic production and subsequent purification of isochorismate from an isochorismate/chorismate mixture. FkbO has a strict preference for chorismate - isochorismate is not accepted as a substrate - therefore the enzyme can be used to selectively hydrolyse chorismate, leading to the chiral building block 3,4-dihydroxycyclohexa-1,5-dienecarboxylate. This simplifies the final purification step, as isochorismate is much easier to separate from the chorismate hydrolysis products than from chorismate itself. The presented procedure starts with an optimised method for purifying chorismate from Escherichia coli culture supernatants, which is followed by conversion into isochorismate with the isochorismate synthase EntC, removal of the remaining chorismate by FkbO and a final purification step using an automated flash chromatography system. Isochorismate was isolated in up to 20% yield and >95% purity from chorismate, and has been characterised with respect to its degradation and suitability as a substrate in enzyme assays.
journal_name
J Biotechnoljournal_title
Journal of biotechnologyauthors
Hubrich F,Müller M,Andexer JNdoi
10.1016/j.jbiotec.2014.06.003subject
Has Abstractpub_date
2014-12-10 00:00:00pages
93-8eissn
0168-1656issn
1873-4863pii
S0168-1656(14)00284-3journal_volume
191pub_type
杂志文章abstract::A new algorithm was developed for the estimation of the metabolic flux distribution based on GC-MS data of proteinogenic amino acids. By using a sensitive GC-MS protocol as well as by combining the global search algorithm such as the genetic algorithm with the local search algorithm such as the Levenberg-Marquardt alg...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(02)00316-4
更新日期:2003-03-06 00:00:00
abstract::Two electronic tongues based on different measurement techniques were applied to the discrimination of four molds and one yeast. Chosen microorganisms were different species of Aspergillus and yeast specie Zygosaccharomyces bailii, which are known as food contaminants. The electronic tongue developed in Linköping Univ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2005.04.017
更新日期:2005-09-29 00:00:00
abstract::Environmental gradient is an important common issue during scale-up process for protein production. To address the dynamic regulatory mechanism of Aspergillus niger being exposed to inhomogeneous glucose concentrations, glucose perturbation were experimented on the steady state of A. niger chemostat culture, and dynam...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2018.08.005
更新日期:2018-12-10 00:00:00
abstract::The use of high capacity micron-sized non-porous magnetic metal chelator adsorbents for the direct recovery of a recombinant metal-binding protein from crude liquors is described. Selectivity and interaction strength of magnetic chelator particles were assessed using a set of native proteins with known behaviour towar...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(97)01688-x
更新日期:1997-04-04 00:00:00
abstract::The promoter sequences of the encoding genes for the three most abundant hexamerins of the Lepidoptera Trichoplusia ni were isolated and cloned into the Autographa californica multiple nucleopolyhedrovirus (AcMNPV)-derived baculovirus expression vector. From the sequences analyzed, the DNA region driving the expressio...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2013.03.012
更新日期:2013-06-10 00:00:00
abstract::In this paper, we report the chromium(VI) reduction by filtrates of Acidithiobacillus and Thiobacillus cultures. Chromium(VI) reduction by filtrates of A. ferrooxidans cultures under acidic conditions was higher than that observed for A. thiooxidans. However, at pH close to 7, chromium(VI) reduction by filtrates of T....
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2005.08.031
更新日期:2006-03-09 00:00:00
abstract::Whole metagenome shotgun sequencing provides information about the gene content and the composition of microbial communities provided that the processing of the samples does not introduce a methodology-driven bias. We tested the impact of DNA isolation and storage period on the metagenome profile. Deep throat swabs we...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2017.01.001
更新日期:2017-05-20 00:00:00
abstract::Deracemization of D,L-phosphinothricin (D,L-PPT) is one of the most promising routes for preparation of optically pure L-PPT. In this work, an efficient multi-enzyme redox cascade was developed for deracemization ofPPT, which includes oxidative reaction and reductive reaction. The oxidative reaction catalyzing oxidati...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2020.09.024
更新日期:2021-01-10 00:00:00
abstract::In this work, a proof of concept elastin-like polypeptide-Z domain fusion (ELP-Z) based monoclonal antibody (mAb) affinity precipitation process is developed using scaled-down filtration techniques. Tangential flow filtration (TFF) is examined for the recovery of ELP-Z-mAb precipitates formed during the mAb binding st...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2014.09.020
更新日期:2014-12-20 00:00:00
abstract::Glycosylation is one of the most important tailoring reactions for natural products. It typically exerts profound direct or indirect effects on their biological activity. The dihydrochalcone phloretin and its known sugar derivatives, particularly phlori(d)zin, have been shown to influence various cellular processes. W...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2015.07.002
更新日期:2015-10-10 00:00:00
abstract::Fluorescence resonance energy transfer studies allow to determine global shape properties of nucleic acids and nucleoprotein complexes. In many DNA-protein complexes, the DNA is more or less bent and the degree of bending can be obtained by FRET. For example, the DNA in complex with the integration host factor (IHF) i...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s1389-0352(01)00038-1
更新日期:2002-01-01 00:00:00
abstract::S-adenosyl-l-methionine (SAM) has been attracting increasing attention because of its significance in the pharmaceutical industry; however, the high cost of this compound limits its application. Tofu yellow serofluid exhibits high nutritional value and is not costly; therefore, it can be utilized as a substrate in the...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2020.01.004
更新日期:2020-02-10 00:00:00
abstract::The hematopoietic system represents an interesting model for gene transfer protocols. Here, we have evaluated the efficiency of a gene transfer system using the polycationic compound SuperFect (Qiagen) and the K562 hematopoietic cell line. Transient and stable vectors carrying the enhanced green fluorescent protein (E...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(01)00276-0
更新日期:2001-06-15 00:00:00
abstract::This study aimed at increasing the pyruvate productivity from a multi-vitamin auxotrophic yeast Torulopsis glabrata, by increasing the availability of NAD+. We examined two strategies for increasing availability of NAD+. To supplement nicotinic acid (NA), the precursor of NAD+; and to increase the activity of alcohol ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2006.04.014
更新日期:2006-11-01 00:00:00
abstract::In the two-step fermentative production of vitamin C, its precursor 2-keto-L-gulonic acid (2-KLG) was synthesized by Ketogulonicigenium vulgare through co-culture with Bacillus megaterium. The reconstruction of the amino acid metabolic pathway through completed genome sequence annotation demonstrated that K. vulgare w...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2011.08.007
更新日期:2011-12-10 00:00:00
abstract::The spatiotemporal analysis of bioregulatory mechanisms at the level of intracellular multienzyme complexes and organelle interactions is made possible by the availability of endogenous and exogenous fluorescence probes, the development of microspectrofluorometers allowing one- and two-dimensional scans of intracellul...
journal_title:Journal of biotechnology
pub_type: 杂志文章,评审
doi:10.1016/0168-1656(90)90128-x
更新日期:1990-01-01 00:00:00
abstract::This study demonstrates the applicability of pressurized stirred tank bioreactors for oxygen transfer enhancement in aerobic cultivation processes. The specific power input and the reactor pressure was employed as process variable. As model organism Escherichia coli, Arxula adeninivorans, Saccharomyces cerevisiae and ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2007.06.010
更新日期:2007-10-31 00:00:00
abstract::A macrokinetic model for Pichia pastoris expressing recombinant human serum albumin is proposed. The model describes the balances of some key metabolites, ATP and NADH, during glycerol and methanol metabolism. In the glycerol growth phase, the metabolic pathways mainly include phosphorylation, glycolysis, tricarboxyli...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2003.08.003
更新日期:2003-12-05 00:00:00
abstract::Exhaustive mutagenesis studies of the reactive centre loop (RCL), a key structural component of proteins belonging to the serpin superfamily of protease inhibitors, are complicated by the size of the RCL, serpin conformational complexity, and, for most serpins, the lack of a serpin-dependent phenotype of expressing ce...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2013.10.011
更新日期:2013-12-01 00:00:00
abstract::Intracellular and extracellular proteome analysis was carried out by combined two-dimensional gel electrophoresis and mass spectrometric analysis (2DE/MS) for high cell density fed-batch culture of recombinant Bacillus megaterium strains. In the early feeding phase with a constant growth rate of 0.12h(-1) under glucos...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2006.05.005
更新日期:2006-11-10 00:00:00
abstract::In earlier study from our group, cholera toxin B subunit had been expressed in tomato for developing a plant-based vaccine against cholera. In the present investigation, gene for accessory colonization factor (acf) subunit A, earlier reported to be essential for efficient colonization in the intestine, has been expres...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2008.03.002
更新日期:2008-05-20 00:00:00
abstract::In spite of high prices for fossil raw materials the production of biomass-based products is rarely economically successful today. Depending on the location feedstock prices are currently so high that products from renewable resources are not marketable when produced in existing process chains. Apart from the higher f...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2009.03.016
更新日期:2009-06-01 00:00:00
abstract::The role of oligosaccharides as biotic elicitors for the enhanced production of antibiotics and enzymes has been established in recent years. These findings could have significant promise for the pharmaceutical and biotechnology industries. Before the elicitors could be used at large-scale, reproducible production and...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2007.07.943
更新日期:2007-09-30 00:00:00
abstract::Selected phage clones expressing a peptide with high binding affinity for recombinant human lactoferrin or von Willebrand factor (vWF) were covalently coupled to macroporous poly(dimethylacrylamide) monolithic column. Large pore size (10-100 microm) of macroporous poly(dimethylacrylamide) makes it possible to couple l...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2007.06.021
更新日期:2007-09-15 00:00:00
abstract::Expression of cloned PhiX174 gene E in bacteria results in lysis of bacteria. It is unique among phage lysis systems as it introduces a transmembrane tunnel structure through the cell envelope complex of Gram-negative bacteria. The resulting bacterial ghosts have intact envelope structures devoid of cytoplasmic conten...
journal_title:Journal of biotechnology
pub_type: 杂志文章,评审
doi:10.1016/0168-1656(95)00123-9
更新日期:1996-01-26 00:00:00
abstract::Soil salinity is one of the major environmental factors, influencing agricultural productivity of crops. As a non-edible and ideal oilseed crop, castor (Ricinus communis L.) has great industrial value in biofuel, but molecular mechanisms of salt stress regulation are still unknown. In this study, the differentially ex...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2020.12.020
更新日期:2021-01-06 00:00:00
abstract::Insertion of foreign DNA into plant genomes occurs randomly and with low frequency. Hence, a selectable marker is generally required to identify transgenic plants. Until now, all selection systems have been based on the use of non-plant genes, derived from microorganisms and usually conferring antibiotic or herbicide ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2005.08.033
更新日期:2006-02-10 00:00:00
abstract::Porcine muscle adenylate kinase (ADK) was overproduced in Escherichia coli using the expression plasmid with double A-T-G codon at the translational starting site and the Shine-Dalgarno (SD) sequence 10 bp apart from the first A-T-G. We used the expression vectors pKK223-3 and pMK2. pMK2 is about 10-20 times larger in...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/0168-1656(94)90176-7
更新日期:1994-02-14 00:00:00
abstract::A rapid quantitative analysis method for murine endothelin-1 (ET-1) and vasoactive intestinal contractor (VIC) gene expression levels was established using a real-time polymerase chain reaction (PCR). We designed primer pairs and TaqMan probes specific for murine prepro-ET-1 (PPET-1) and prepro-VIC (PPVIC) genes, base...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(00)00342-4
更新日期:2001-11-30 00:00:00
abstract::Escherichia coli strain BL21(DE3) was tested as a delivery vector for gene transfer to a murine P388D1 macrophage cell line using a 96-well high-throughput assay. Five recombinant strains of E. coli were compared to identify the effect recombinant listeriolysin O (LLO) and associated gene expression parameters had on ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2008.07.1815
更新日期:2008-10-10 00:00:00