Abstract：
:Coumermycin A1 is an aminocoumarin antibiotic produced by Streptomyces rishiriensis. It exhibits potent antibacterial and anticancer activity. The coumermycin A1 molecule contains two terminal 5-methyl-pyrrole-2-carboxylic acid moieties and one central 3-methylpyrrole-2,4-dicarboxylic acid moiety (CPM). While the biosynthesis of the terminal moieties has been elucidated in detail, the pathway leading to the CPM remains poorly understood. In this work, the minimal set of genes required for the generation of the CPM scaffold was identified. It comprises the five genes couR1, couR2a, couR2b, couR3, and couR4 which are grouped together in a contiguous 4.7 kb region within the coumermycin A1 biosynthetic gene cluster. The DNA fragment containing these genes was cloned into an expression plasmid and heterologously expressed in Streptomyces coelicolor M1146. Thereupon, the formation of CPM could be shown by HPLC and by HPLC-MS/MS, in comparison to an authentic CPM standard. This proves that the genes couR1-couR4 are sufficient to direct the biosynthesis of CPM, and that the adjacent genes couR5 and couR6 are not required for this pathway. The enzyme CouR3 was expressed in Escherichia coli and purified to near homogeneity. The protein exhibited an ATPase activity similar to that reported for its close ortholog, the threonine kinase PduX. However, we could not show a threonine kinase activity of CouR3, and; therefore, the substrate of CouR3 in CPM biosynthesis is still unknown and may be different from threonine.
journal_name
J Ind Microbiol Biotechnoljournal_title
Journal of industrial microbiology & biotechnologyauthors
Novotna J,Gust B,Kulik A,Spizek J,Heide Ldoi
10.1007/s10295-013-1266-6subject
Has Abstractpub_date
2013-08-01 00:00:00pages
915-25issue
8eissn
1367-5435issn
1476-5535journal_volume
40pub_type
杂志文章abstract：:A membrane-screening method was developed in conjunction with flow cytometric (FC) analysis for determining the efficacies of antimould pressure-treatment formulations for mould species of cosmetic significance on southern pine. Fusarium subglutinans, Aspergillus flavus, Penicillium chrysogenum, and Paecilomyces spp. ...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1038/sj.jim.7000279
更新日期：2002-12-01 00:00:00
abstract：:This review summarizes progress in the construction of efficient yeast ethanol producers from glucose/sucrose and lignocellulose. Saccharomyces cerevisiae is the major industrial producer of first-generation ethanol. The different approaches to increase ethanol yield and productivity from glucose in S. cerevisiae are ...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章,评审
doi：10.1007/s10295-019-02242-x
更新日期：2020-01-01 00:00:00
abstract：:L-Methionine is an essential amino acid in humans, which plays an important role in the synthesis of some important amino acids and proteins. In this work, metabolic flux of batch fermentation of L-methionine with recombinant Escherichia coli W3110BL was analyzed using the flux balance analysis method, which estimated...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-020-02264-w
更新日期：2020-03-01 00:00:00
abstract：:In this study, polysaccharide-producing bacteria were isolated from slimes collected from two Finnish and one Spanish paper mill and the exopolysaccharides (EPSs) produced by 18 isolates were characterised. Most of the isolates, selected on the bases of slimy colony morphology, were members of the family Enterobacteri...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-005-0064-1
更新日期：2006-05-01 00:00:00
abstract：:Bioethanol fermentations expose yeasts to a new, complex and challenging fermentation medium with specific inhibitors and sugar mixtures depending on the type of carbon source. It is, therefore, suggested that the natural diversity of yeasts should be further exploited in order to find yeasts with good ethanol yield i...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-014-1544-y
更新日期：2015-01-01 00:00:00
abstract：:Our previous work revealed proanthocyanidins (PAs) could pose significant enhancement on the activity of H(+)-ATPase and fermentation efficiency after a transient initial inhibition (Li et al in Am J Enol Vitic 62(4):512-518, 2011). The aim of the present work was to understand the possible mechanism for this regulati...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-014-1517-1
更新日期：2014-12-01 00:00:00
abstract：:Acetoin, a major extracellular catabolic product of Bacillus subtilis cultured on glucose, is widely used to add flavor to food and also serves as a precursor for chemical synthesis. The biosynthesis of acetoin from pyruvate requires the enzymes α-acetolactate synthase (ALS) and α-acetolactate decarboxylase (ALDC), bo...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-013-1303-5
更新日期：2013-09-01 00:00:00
abstract：:The use of proteomics for direct detection of expressed pathways producing natural products has yielded many new compounds, even when used in a screening mode without a bacterial genome sequence available. Here we quantify the advantages of having draft DNA-sequence available for strain-specific proteomics using the l...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-013-1373-4
更新日期：2014-02-01 00:00:00
abstract：:Biocatalytic hydrocarbon oxyfunctionalizations are typically accomplished using oxygenases in living bacteria as biocatalysts. These processes are often limited by either oxygen mass transfer, cofactor regeneration, and/or enzyme instabilities due to the formation of reactive oxygen species. Here, we discuss an altern...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-010-0883-6
更新日期：2011-08-01 00:00:00
abstract：:In this study, we detail the specificity of an aspartic peptidase from Rhizomucor miehei and evaluate the effects of this peptidase on clotting milk using the peptide sequence of k-casein (Abz-LSFMAIQ-EDDnp) and milk powder. Molecular mass of the peptidase was estimated at 37 kDa, and optimum activity was achieved at ...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-016-1780-4
更新日期：2016-08-01 00:00:00
abstract：:The effects of different straw types and organic and inorganic nitrogen (N) sources on the chemical composition and odor concentration (OC) of mushroom composting emissions, compost parameters, and mushroom yield were examined using bench-scale and large-scale (windrows and aerated tunnels) composting systems. There w...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1038/sj.jim.7000292
更新日期：2002-09-01 00:00:00
abstract：:Trametes versicolor 1 was shown to grow on phenol as its sole carbon and energy source. The culture growth and degradation ability dependence on culture medium pH value was observed. The optimal pH value of a liquid Czapek salt medium was 6.5. The investigated strain utilized completely 0.5 g/l phenol in 6 days. The d...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-008-0412-z
更新日期：2008-11-01 00:00:00
abstract：:Corynebacterium glutamicum SNK 118 was metabolically engineered with improved L-arginine titer. Considering the crucial role of NADPH level in L-arginine production, pntAB (membrane-bound transhydrogenase) and ppnK (NAD+ kinase) were co-expressed to increase the intracellular NADPH pool. Expression of pntAB exhibited ...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-018-2103-8
更新日期：2019-01-01 00:00:00
abstract：:The ability of bacteria to attach to surfaces and develop into a biofilm has been of considerable interest to many groups in numerous industries, including the medical and food industry. However, little is understood in the critical initial step seen in all biofilm development, the initial bacterial cell attachment to...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章,评审
doi：10.1007/s10295-007-0234-4
更新日期：2007-09-01 00:00:00
abstract：:Rapamycin, as a macrocyclic polyketide with immunosuppressive, antifungal, and anti-tumor activity produced by Streptomyces hygroscopicus, is receiving considerable attention for its significant contribution in medical field. However, the production capacity of the wild strain is very low. Hereby, a computational guid...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-016-1880-1
更新日期：2017-02-01 00:00:00
abstract：:Ethyl carbamate (EC), a pluripotent carcinogen, is mainly formed by a spontaneous chemical reaction of ethanol with urea in wine. The arginine, one of the major amino acids in grape musts, is metabolized by arginase (encoded by CAR1) to ornithine and urea. To reduce the production of urea and EC, an arginase-deficient...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-016-1737-7
更新日期：2016-05-01 00:00:00
abstract：:Providencia rettgeri strain YL was found to be efficient in heterotrophic nitrogen removal under aerobic conditions. Maximum removal of NH(4) (+)-N occurred under the conditions of pH 7 and supplemented with glucose as the carbon source. Inorganic ions such as Mg(2+), Mn(2+), and Zn(2+) largely influenced the growth a...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-010-0708-7
更新日期：2010-06-01 00:00:00
abstract：:A metabolic network consisting of 48 reactions was established to describe intracellular processes during growth and poly-3-hydroxybutyrate (PHB) production for Cupriavidus necator DSM 545. Glycerol acted as the sole carbon source during exponential, steady-state cultivation conditions. Elementary flux modes were obta...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-014-1439-y
更新日期：2014-06-01 00:00:00
abstract：:D-tagatose is produced from D-galactose by the enzyme L-arabinose isomerase (L-AI) in a commercially viable bioprocess. An active and stable biocatalyst was obtained by modifying chitosan gel structure through reaction with TNBS, D-fructose or DMF, among others. This led to a significant improvement in L-AI immobiliza...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-015-1662-1
更新日期：2015-10-01 00:00:00
abstract：:Bacterial contamination is an ongoing problem for commercial fuel ethanol production facilities. Both chronic and acute infections are of concern, due to the fact that bacteria compete with the ethanol-producing yeast for sugar substrates and micronutrients. Lactic acid levels often rise during bouts of contamination,...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-004-0159-0
更新日期：2004-10-01 00:00:00
abstract：:L-DOPA is a key pharmaceutical agent for treating Parkinson's, and market demand has exploded due to the aging population. There are several challenges associated with the chemical synthesis of L-DOPA, including complicated operation, harsh conditions, and serious pollution. A biocatalysis route for L-DOPA production ...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-019-02237-8
更新日期：2019-12-01 00:00:00
abstract：:Isoamylase catalyzes the hydrolysis of α-1,6-glycosidic linkages in glycogen, amylopectin and α/β-limit dextrins. A semi-rational design strategy was performed to improve catalytic properties of isoamylase from Bacillus lentus. Three residues in vicinity of the essential residues, Arg505, Asn513, and Gly608, were chos...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-015-1708-4
更新日期：2016-01-01 00:00:00
abstract：:Human-like collagen (HLC) is a novel biomedical material with promising applications. Usually, insoluble HLC was formed due to over-expression. In order to improve the production of soluble HLC, the effective chaperone proteins and their mediation roles on HLC were clarified. Trigger factor (TF) pathway with low speci...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-014-1500-x
更新日期：2014-11-01 00:00:00
abstract：:In this study, we constructed a coculture consortium comprising engineered Pseudomonas putida KT2440 and Escherichia coli MG1655. Provision of "related" carbon sources and synthesis of medium-chain-length polyhydroxyalkanoates (mcl-PHAs) were separately assigned to these strains via a modular construction strategy. To...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-020-02267-7
更新日期：2020-03-01 00:00:00
abstract：:Twenty years ago, the first complete gene cluster encoding the actinorhodin biosynthetic pathway was cloned and characterized. Subsequently, the gene clusters encoding the biosynthetic pathways for many antibiotics were isolated. In the past decade, breakthroughs in technology brought that generation of rationally des...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章,评审
doi：10.1007/s10295-004-0131-z
更新日期：2004-03-01 00:00:00
abstract：:An improved extraction method for ethyl carbamate, a genotoxic and carcinogenic compound found in various fermented foods and beverages, was investigated for its determination in the two most typical Korean traditional rice wines, takju and yakju. When the rice wines were extracted twice with chloroform at 30 degrees ...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1038/sj.jim.7000148
更新日期：2001-06-01 00:00:00
abstract：:The objective of this study was to demonstrate the feasibility of novel, Horizontal Flow Biofilm Reactor (HFBR) technology for the treatment of ammonia (NH3)-contaminated airstreams. Three laboratory-scale HFBRs were used for remediation of an NH3-containing airstream at 10 °C during a 90-d trial to test the efficacy ...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-016-1740-z
更新日期：2016-05-01 00:00:00
abstract：:Cellulase-free xylan-degrading enzyme preparations from Acrophialophora nainiana, Humicola grisea var. thermoidea and two Trichoderma harzianum strains were used as bleaching agents for Eucalyptus kraft pulp, prior to a chlorine dioxide and alkaline bleaching sequence. In comparison to the control sequence (performed ...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1038/sj/jim/7000227
更新日期：2002-04-01 00:00:00
abstract：:The production of recombinant proteins by Pichia pastoris under AOX1 promoter is usually performed using methanol together with either glycerol or sorbitol as co-substrate. Although both co-substrates have been widely used, comparative studies are scarce. In addition, these comparisons have been performed at different...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-016-1895-7
更新日期：2017-03-01 00:00:00
abstract：:Study of the distribution of the oxygen mass transfer coefficient, k (l) a, for a stirred bioreactor and simulated (pseudoplastic solutions of carboxymethylcellulose sodium salt) bacterial (P. shermanii), yeast (S. cerevisiae), and fungal (P. chrysogenum free mycelia) broths indicated significant variation of transfer...
journal_title：Journal of industrial microbiology & biotechnology
pub_type： 杂志文章
doi：10.1007/s10295-010-0930-3
更新日期：2011-09-01 00:00:00
