PUMA publications for /tag/fermentation,https://puma.ub.uni-stuttgart.de/tag/fermentation,PUMA RSS feed for /tag/fermentation,2024-03-28T13:32:28+01:00Importance of NADPH supply for improved L-valine formation in Corynebacterium glutamicumhttps://puma.ub.uni-stuttgart.de/bibtex/2dfb0ffb355b1bb961e53e70b66a327fd/bastianbastian2018-02-09T13:18:17+01:00Biological, Cell Corynebacterium Culture Fermentation, Glucose-6-Phosphate Isomerase, Media, Metabolic Metabolome Models, NADP, Networks Pathways, Techniques, Valine, and glutamicum, myown <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Bartek" itemprop="url" href="/person/1ea026818f74ee7c252525689e9c0c32c/author/0"><span itemprop="name">T. Bartek</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bastian Blombach" itemprop="url" href="/person/1ea026818f74ee7c252525689e9c0c32c/author/1"><span itemprop="name">B. Blombach</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Enrico Zönnchen" itemprop="url" href="/person/1ea026818f74ee7c252525689e9c0c32c/author/2"><span itemprop="name">E. Zönnchen</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Pia Makus" itemprop="url" href="/person/1ea026818f74ee7c252525689e9c0c32c/author/3"><span itemprop="name">P. Makus</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Siegmund Lang" itemprop="url" href="/person/1ea026818f74ee7c252525689e9c0c32c/author/4"><span itemprop="name">S. Lang</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernhard J. Eikmanns" itemprop="url" href="/person/1ea026818f74ee7c252525689e9c0c32c/author/5"><span itemprop="name">B. Eikmanns</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Marco Oldiges" itemprop="url" href="/person/1ea026818f74ee7c252525689e9c0c32c/author/6"><span itemprop="name">M. Oldiges</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Biotechnol. Prog.</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">26 </span></span>(<span itemprop="issueNumber">2</span>):
<span itemprop="pagination">361--371</span></em> </span>(<em><span>April 2010<meta content="April 2010" itemprop="datePublished"/></span></em>)</span>Fri Feb 09 13:18:17 CET 2018Biotechnol. Prog.apr2361--371Importance of {NADPH} supply for improved {L}-valine formation in {Corynebacterium} glutamicum262010Biological, Cell Corynebacterium Culture Fermentation, Glucose-6-Phosphate Isomerase, Media, Metabolic Metabolome Models, NADP, Networks Pathways, Techniques, Valine, and glutamicum, myown Cofactor recycling is known to be crucial for amino acid synthesis. Hence, cofactor supply was now analyzed for L-valine to identify new targets for an improvement of production. The central carbon metabolism was analyzed by stoichiometric modeling to estimate the influence of cofactors and to quantify the theoretical yield of L-valine on glucose. Three different optimal routes for L-valine biosynthesis were identified by elementary mode (EM) analysis. The modes differed mainly in the manner of NADPH regeneration, substantiating that the cofactor supply may be crucial for efficient L-valine production. Although the isocitrate dehydrogenase as an NADPH source within the tricarboxylic acid cycle only enables an L-valine yield of Y(Val/Glc) = 0.5 mol L-valine/mol glucose (mol Val/mol Glc), the pentose phosphate pathway seems to be the most promising NADPH source. Based on the theoretical calculation of EMs, the gene encoding phosphoglucoisomerase (PGI) was deleted to achieve this EM with a theoretical yield Y(Val/Glc) = 0.86 mol Val/mol Glc during the production phase. The intracellular NADPH concentration was significantly increased in the PGI-deficient mutant. L-Valine yield increased from 0.49 +/- 0.13 to 0.67 +/- 0.03 mol Val/mol Glc, and, concomitantly, the formation of by-products such as pyruvate was reduced.L-valine production with pyruvate dehydrogenase complex-deficient Corynebacterium glutamicumhttps://puma.ub.uni-stuttgart.de/bibtex/25bac540150e10acba07b2f8205f6f070/bastianbastian2018-02-09T13:18:17+01:00Acid, Alanine Complex, Corynebacterium Dehydrogenase Fermentation, Isoleucine, Lysine, Pyruvate Pyruvic Valine, glutamicum, myown <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bastian Blombach" itemprop="url" href="/person/1d744d92c5af8f45409137c58d022ef1c/author/0"><span itemprop="name">B. Blombach</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mark E. Schreiner" itemprop="url" href="/person/1d744d92c5af8f45409137c58d022ef1c/author/1"><span itemprop="name">M. Schreiner</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jirí Holátko" itemprop="url" href="/person/1d744d92c5af8f45409137c58d022ef1c/author/2"><span itemprop="name">J. Holátko</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Bartek" itemprop="url" href="/person/1d744d92c5af8f45409137c58d022ef1c/author/3"><span itemprop="name">T. Bartek</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Marco Oldiges" itemprop="url" href="/person/1d744d92c5af8f45409137c58d022ef1c/author/4"><span itemprop="name">M. Oldiges</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernhard J. Eikmanns" itemprop="url" href="/person/1d744d92c5af8f45409137c58d022ef1c/author/5"><span itemprop="name">B. Eikmanns</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Appl. Environ. Microbiol.</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">73 </span></span>(<span itemprop="issueNumber">7</span>):
<span itemprop="pagination">2079--2084</span></em> </span>(<em><span>April 2007<meta content="April 2007" itemprop="datePublished"/></span></em>)</span>Fri Feb 09 13:18:17 CET 2018Appl. Environ. Microbiol.apr72079--2084L-valine production with pyruvate dehydrogenase complex-deficient {Corynebacterium} glutamicum732007Acid, Alanine Complex, Corynebacterium Dehydrogenase Fermentation, Isoleucine, Lysine, Pyruvate Pyruvic Valine, glutamicum, myown Corynebacterium glutamicum was engineered for the production of L-valine from glucose by deletion of the aceE gene encoding the E1p enzyme of the pyruvate dehydrogenase complex and additional overexpression of the ilvBNCE genes encoding the L-valine biosynthetic enzymes acetohydroxyacid synthase, isomeroreductase, and transaminase B. In the absence of cellular growth, C. glutamicum DeltaaceE showed a relatively high intracellular concentration of pyruvate (25.9 mM) and produced significant amounts of pyruvate, L-alanine, and L-valine from glucose as the sole carbon source. Lactate or acetate was not formed. Plasmid-bound overexpression of ilvBNCE in C. glutamicum DeltaaceE resulted in an approximately 10-fold-lower intracellular pyruvate concentration (2.3 mM) and a shift of the extracellular product pattern from pyruvate and L-alanine towards L-valine. In fed-batch fermentations at high cell densities and an excess of glucose, C. glutamicum DeltaaceE(pJC4ilvBNCE) produced up to 210 mM L-valine with a volumetric productivity of 10.0 mM h(-1) (1.17 g l(-1) h(-1)) and a maximum yield of about 0.6 mol per mol (0.4 g per g) of glucose.Improving the carbon balance of fermentations by total carbon analyseshttps://puma.ub.uni-stuttgart.de/bibtex/2956c2dcbdb9a243af9ee1c487913ed8b/bastianbastian2018-02-09T13:18:17+01:00Bioprocess Bioreactions, Carbon Fermentation, Instrumentation balance, monitoring, myown <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jens Buchholz" itemprop="url" href="/person/15a4d3a531684fb51e5c4721a14a1f3da/author/0"><span itemprop="name">J. Buchholz</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Michaela Graf" itemprop="url" href="/person/15a4d3a531684fb51e5c4721a14a1f3da/author/1"><span itemprop="name">M. Graf</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bastian Blombach" itemprop="url" href="/person/15a4d3a531684fb51e5c4721a14a1f3da/author/2"><span itemprop="name">B. Blombach</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ralf Takors" itemprop="url" href="/person/15a4d3a531684fb51e5c4721a14a1f3da/author/3"><span itemprop="name">R. Takors</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Biochemical Engineering Journal</span>, </em> </span>(<em><span>September 2014<meta content="September 2014" itemprop="datePublished"/></span></em>)</span>Fri Feb 09 13:18:17 CET 2018Biochemical Engineering Journalsep162--169Improving the carbon balance of fermentations by total carbon analyses902014Bioprocess Bioreactions, Carbon Fermentation, Instrumentation balance, monitoring, myown Carbon balancing of microbial fermentations is a valuable tool for the evaluation of the process performance and to identify the presence of undesired by-products. In this study, we demonstrate the relevance of total carbon (TC) analysis for carbon balancing in fermentations with the wild-type of Corynebacterium glutamicum by (i) quantifying significant amounts of dissolved inorganic carbonic species (TIC) in the culture medium and (ii) determining the effective (mass) carbon content of the biomass fraction (MC,X). In principle, TC based carbon balancing yielded at fully matching carbon balances. Thus, the application of our TC approach for the accurate detection of TIC and MC,X increased the total carbon recovery in standard batch fermentations with C. glutamicum on glucose from about 76\% to carbon closures of 94–100\% in contrast to conventional approaches. Besides, the origin of the missing 6\%-gap could be attributed to incomplete quantification of all carbon sources in the liquid phase. To conclude this study, the concept of TC-based balancing was transferred to an l-lysine production process, successfully quantifying relevant system carbon fractions, which resulted in matched carbon recoveries.Bio-based production of organic acids with Corynebacterium glutamicumhttps://puma.ub.uni-stuttgart.de/bibtex/2a7bae842f703e05319d0ca548f4461fb/bastianbastian2018-02-09T13:18:17+01:00Acids, Biotechnology, Carboxylic Chemicals, Corynebacterium Engineering Engineering, Fermentation, Genetic Metabolic Organic glutamicum, myown <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Stefan Wieschalka" itemprop="url" href="/person/13585759eabf5f155131ea9827284ca79/author/0"><span itemprop="name">S. Wieschalka</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bastian Blombach" itemprop="url" href="/person/13585759eabf5f155131ea9827284ca79/author/1"><span itemprop="name">B. Blombach</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Michael Bott" itemprop="url" href="/person/13585759eabf5f155131ea9827284ca79/author/2"><span itemprop="name">M. Bott</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernhard J. Eikmanns" itemprop="url" href="/person/13585759eabf5f155131ea9827284ca79/author/3"><span itemprop="name">B. Eikmanns</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Microb Biotechnol</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">6 </span></span>(<span itemprop="issueNumber">2</span>):
<span itemprop="pagination">87--102</span></em> </span>(<em><span>March 2013<meta content="March 2013" itemprop="datePublished"/></span></em>)</span>Fri Feb 09 13:18:17 CET 2018Microb Biotechnolmar287--102Bio-based production of organic acids with {Corynebacterium} glutamicum62013Acids, Biotechnology, Carboxylic Chemicals, Corynebacterium Engineering Engineering, Fermentation, Genetic Metabolic Organic glutamicum, myown The shortage of oil resources, the steadily rising oil prices and the impact of its use on the environment evokes an increasing political, industrial and technical interest for development of safe and efficient processes for the production of chemicals from renewable biomass. Thus, microbial fermentation of renewable feedstocks found its way in white biotechnology, complementing more and more traditional crude oil-based chemical processes. Rational strain design of appropriate microorganisms has become possible due to steadily increasing knowledge on metabolism and pathway regulation of industrially relevant organisms and, aside from process engineering and optimization, has an outstanding impact on improving the performance of such hosts. Corynebacterium glutamicum is well known as workhorse for the industrial production of numerous amino acids. However, recent studies also explored the usefulness of this organism for the production of several organic acids and great efforts have been made for improvement of the performance. This review summarizes the current knowledge and recent achievements on metabolic engineering approaches to tailor C. glutamicum for the bio-based production of organic acids. We focus here on the fermentative production of pyruvate, L- and D-lactate, 2-ketoisovalerate, 2-ketoglutarate, and succinate. These organic acids represent a class of compounds with manifold application ranges, e.g. in pharmaceutical and cosmetics industry, as food additives, and economically very interesting, as precursors for a variety of bulk chemicals and commercially important polymers.Effect of pyruvate dehydrogenase complex deficiency on L-lysine production with Corynebacterium glutamicumhttps://puma.ub.uni-stuttgart.de/bibtex/2930ecfe113b73f241ab0452b05337d89/bastianbastian2018-02-09T13:18:17+01:00Bacterial, Base Biotechnology Complex, Corynebacterium DNA, Dehydrogenase Deletion, Expression, Fermentation, Gene Genes, Kinetics, Lysine, Pyruvate Sequence, glutamicum, myown <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bastian Blombach" itemprop="url" href="/person/197097cd65b8e231a2578efbc7586a5dc/author/0"><span itemprop="name">B. Blombach</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mark E. Schreiner" itemprop="url" href="/person/197097cd65b8e231a2578efbc7586a5dc/author/1"><span itemprop="name">M. Schreiner</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Matthias Moch" itemprop="url" href="/person/197097cd65b8e231a2578efbc7586a5dc/author/2"><span itemprop="name">M. Moch</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Marco Oldiges" itemprop="url" href="/person/197097cd65b8e231a2578efbc7586a5dc/author/3"><span itemprop="name">M. Oldiges</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernhard J. Eikmanns" itemprop="url" href="/person/197097cd65b8e231a2578efbc7586a5dc/author/4"><span itemprop="name">B. Eikmanns</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Appl. Microbiol. Biotechnol.</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">76 </span></span>(<span itemprop="issueNumber">3</span>):
<span itemprop="pagination">615--623</span></em> </span>(<em><span>September 2007<meta content="September 2007" itemprop="datePublished"/></span></em>)</span>Fri Feb 09 13:18:17 CET 2018Appl. Microbiol. Biotechnol.sep3615--623Effect of pyruvate dehydrogenase complex deficiency on {L}-lysine production with {Corynebacterium} glutamicum762007Bacterial, Base Biotechnology Complex, Corynebacterium DNA, Dehydrogenase Deletion, Expression, Fermentation, Gene Genes, Kinetics, Lysine, Pyruvate Sequence, glutamicum, myown Intracellular precursor supply is a critical factor for amino acid productivity of Corynebacterium glutamicum. To test for the effect of improved pyruvate availability on L-lysine production, we deleted the aceE gene encoding the E1p enzyme of the pyruvate dehydrogenase complex (PDHC) in the L-lysine-producer C. glutamicum DM1729 and characterised the resulting strain DM1729-BB1 for growth and L-lysine production. Compared to the host strain, C. glutamicum DM1729-BB1 showed no PDHC activity, was acetate auxotrophic and, after complete consumption of the available carbon sources glucose and acetate, showed a more than 50\% lower substrate-specific biomass yield (0.14 vs 0.33 mol C/mol C), an about fourfold higher biomass-specific L-lysine yield (5.27 vs 1.23 mmol/g cell dry weight) and a more than 40\% higher substrate-specific L-lysine yield (0.13 vs 0.09 mol C/mol C). Overexpression of the pyruvate carboxylase or diaminopimelate dehydrogenase genes in C. glutamicum DM1729-BB1 resulted in a further increase in the biomass-specific L-lysine yield by 6 and 56\%, respectively. In addition to L-lysine, significant amounts of pyruvate, L-alanine and L-valine were produced by C. glutamicum DM1729-BB1 and its derivatives, suggesting a surplus of precursor availability and a further potential to improve L-lysine production by engineering the L-lysine biosynthetic pathway.