Abstract:
BACKGROUND:Genetic factors and a dysregulated immune response towards commensal bacteria contribute to the pathogenesis of Inflammatory Bowel Disease (IBD). Animal models demonstrated that the normal intestinal flora is crucial for the development of intestinal inflammation. However, due to the complexity of the intestinal flora, it has been difficult to design experiments for detection of proinflammatory bacterial antigen(s) involved in the pathogenesis of the disease. Several studies indicated a potential association of E. coli with IBD. In addition, T cell clones of IBD patients were shown to cross react towards antigens from different enteric bacterial species and thus likely responded to conserved bacterial antigens. We therefore chose highly conserved E. coli proteins as candidate antigens for abnormal T cell responses in IBD and used high-throughput techniques for cloning, expression and purification under native conditions of a set of 271 conserved E. coli proteins for downstream immunologic studies. RESULTS:As a standardized procedure, genes were PCR amplified and cloned into the expression vector pQTEV2 in order to express proteins N-terminally fused to a seven-histidine-tag. Initial small-scale expression and purification under native conditions by metal chelate affinity chromatography indicated that the vast majority of target proteins were purified in high yields. Targets that revealed low yields after purification probably due to weak solubility were shuttled into Gateway (Invitrogen) destination vectors in order to enhance solubility by N-terminal fusion of maltose binding protein (MBP), N-utilizing substance A (NusA), or glutathione S-transferase (GST) to the target protein. In addition, recombinant proteins were treated with polymyxin B coated magnetic beads in order to remove lipopolysaccharide (LPS). Thus, 73% of the targeted proteins could be expressed and purified in large-scale to give soluble proteins in the range of 500 microg. CONCLUSION:Here, we report a cost-efficient procedure to produce around 200 soluble recombinant E. coli proteins in large-scale, including removal of LPS by polymyxin B coated beads for subsequent use of the proteins in downstream immunological studies.
journal_name
Microb Cell Factjournal_title
Microbial cell factoriesauthors
Ergin A,Büssow K,Sieper J,Thiel A,Duchmann R,Adam Tdoi
10.1186/1475-2859-6-18subject
Has Abstractpub_date
2007-06-06 00:00:00pages
18issn
1475-2859pii
1475-2859-6-18journal_volume
6pub_type
杂志文章abstract:BACKGROUND:Targeting of cellular proteins to the extracellular environment is directed by a secretory signal sequence located at the N-terminus of a secretory protein. These signal sequences usually contain an N-terminal basic amino acid followed by a stretch containing hydrophobic residues, although no consensus signa...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-015-0203-y
更新日期:2015-02-14 00:00:00
abstract::Pseudomonas sp. JHN decolourized and biotransformed 4-chloro-2-nitrophenol (4C2NP) in the presence of additional carbon source. The effect of the various concentrations of the 4C2NP was studied on the decolourization of 4C2NP by Pseudomonas sp. JHN. It was observed that strain JHN decolourized and biotransformed 4C2NP...
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abstract:BACKGROUND:Prions were first identified as infectious proteins associated with fatal brain diseases in mammals. However, fungal prions behave as epigenetic regulators that can alter a range of cellular processes. These proteins propagate as self-perpetuating amyloid aggregates being an example of structural inheritance...
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abstract:BACKGROUND:Microalgae has been concerned as a potential source of biodiesel in the recent years. However, it is costly to harvest microalgae as it is commonly cultured in water and the cells are too small to harvest. In order to reduce the cost of cultivation and harvesting, it is important to improve the biomass produ...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-014-0142-z
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abstract:BACKGROUND:Aspergillus niger is widely used for enzyme production and achievement of high enzyme production depends on the comprehensive understanding of cell's metabolic regulation mechanisms. RESULTS:In this paper, we investigate the metabolic differences and regulation mechanisms between a high glucoamylase-produci...
journal_title:Microbial cell factories
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doi:10.1186/s12934-015-0329-y
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abstract:BACKGROUND:Catalase (EC 1.11.1.6) is one of the important industrial enzyme employed in diagnostic and analytical methods in the form of biomarkers and biosensors in addition to their enormous applications in textile, paper, food and pharmaceutical sectors. The present study demonstrates the utility of a newly isolated...
journal_title:Microbial cell factories
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abstract:BACKGROUND:Zygosaccharomyces bailii is a diploid budding yeast still poorly characterized, but widely recognised as tolerant to several stresses, most of which related to industrial processes of production. Because of that, it would be very interesting to develop its ability as a cell factory. Gas1p is a beta-1,3-gluca...
journal_title:Microbial cell factories
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abstract:BACKGROUND:The solubility of recombinant proteins expressed in bacteria is often disappointingly low. Several strategies have been developed to improve the yield and one of the most common strategies is the fusion of the target protein with a suitable partner. Despite several reports on the successful use of each of th...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/1475-2859-4-34
更新日期:2005-12-13 00:00:00
abstract:BACKGROUND:The Bacillus subtilis spore has long been used to display antigens and enzymes. Spore display can be accomplished by a recombinant and a non-recombinant approach, with the latter proved more efficient than the recombinant one. We used the non-recombinant approach to independently adsorb two thermophilic enzy...
journal_title:Microbial cell factories
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更新日期:2017-11-28 00:00:00
abstract:BACKGROUND:Oil palm empty fruit bunch (EFB) is a lignocellulosic waste produced in palm oil industry. EFB mainly consists of cellulose, hemicellulose (mainly xylan) and lignin and has a great potential to be reused. Converting EFB to fermentable sugars and value-added chemicals is a much better choice than treating EFB...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-014-0157-5
更新日期:2014-11-11 00:00:00
abstract:BACKGROUND:Bacteriocin-producing Lactic acid bacteria (LAB) have vast applications in human and animal health, as well as in food industry. The structural, immunity, regulatory, export and modification genes are required for effective bacteriocin biosynthesis. Variations in gene sequence, composition and organisation w...
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pub_type: 杂志文章
doi:10.1186/s12934-015-0280-y
更新日期:2015-06-16 00:00:00
abstract:BACKGROUND:L-Alanyl-L-glutamine (AQ) is a functional dipeptide with high water solubility, good thermal stability and high bioavailability. It is widely used in clinical treatment, post-operative rehabilitation, sports health care and other fields. AQ is mainly produced via chemical synthesis which is complicated, time...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-020-01369-2
更新日期:2020-06-11 00:00:00
abstract:BACKGROUND:The methylotrophic yeast Pichia pastoris is a well-studied host organism for recombinant protein production, which is usually regulated either by a constitutive promoter (e.g. promoter of glyceraldehyde-3-phosphate dehydrogenase; PGAP) or an inducible promoter (e.g. promoter of alcohol oxidase 1; PAOX1). Bot...
journal_title:Microbial cell factories
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doi:10.1186/s12934-017-0768-8
更新日期:2017-09-13 00:00:00
abstract:BACKGROUND:Pichia pastoris is one of the most important host organisms for the recombinant production of proteins in industrial biotechnology. To date, strain specific parameters, which are needed to set up feeding profiles for fed batch cultivations, are determined by time-consuming continuous cultures or consecutive ...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/1475-2859-10-14
更新日期:2011-03-03 00:00:00
abstract::Membrane remodeling and phospholipid biosynthesis are normally tightly regulated to maintain the shape and function of cells. Indeed, different physiological mechanisms ensure a precise coordination between de novo phospholipid biosynthesis and modulation of membrane morphology. Interestingly, the overproduction of ce...
journal_title:Microbial cell factories
pub_type: 杂志文章,评审
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更新日期:2020-09-04 00:00:00
abstract:BACKGROUND:Serratia plymuthica WS3236 was selected for whole genome sequencing based on preliminary genetic and chemical screening indicating the presence of multiple natural product pathways. This led to the identification of a putative sodorifen biosynthetic gene cluster (BGC). The natural product sodorifen is a vola...
journal_title:Microbial cell factories
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doi:10.1186/s12934-019-1080-6
更新日期:2019-02-07 00:00:00
abstract:BACKGROUND:The metabolic capabilities of acetogens to ferment a wide range of sugars, to grow autotrophically on H2/CO2, and more importantly on synthesis gas (H2/CO/CO2) make them very attractive candidates as production hosts for biofuels and biocommodities. Acetogenic metabolism is considered one of the earliest mod...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/1475-2859-12-118
更新日期:2013-11-25 00:00:00
abstract:BACKGROUND:Streptomycetes produce a plethora of natural products including antibiotics and anticancer drugs, as well as many industrial enzymes. Their mycelial life style is a major bottleneck for industrial exploitation and over decades strain improvement programs have selected production strains with better growth pr...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-015-0224-6
更新日期:2015-04-01 00:00:00
abstract:BACKGROUND:Ganoderic acids (GAs), derived from the medicinal mushroom Ganoderma lucidum, possess anticancer and other important pharmacological activities. To improve production of GAs, a homologous farnesyl diphosphate synthase (FPS) gene was overexpressed in G. lucidum. Moreover, the influence of FPS gene overexpress...
journal_title:Microbial cell factories
pub_type: 杂志文章
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更新日期:2019-06-28 00:00:00
abstract:BACKGROUND:Succinic acid is well established as bio-based platform chemical with production quantities expecting to increase exponentially within the next decade. Actinobacillus succinogenes is by far the most studied wild organism for producing succinic acid and is known for high yield and titre during production on v...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-014-0111-6
更新日期:2014-08-19 00:00:00
abstract:BACKGROUND:Lactones are highly valuable cyclic esters of hydroxy fatty acids that find application as pure fragrances or as building blocks of speciality chemicals. While chemical synthesis often leads to undesired racemic mixtures, microbial production allows obtaining optically pure lactones. The production of a spec...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-019-1113-1
更新日期:2019-03-28 00:00:00
abstract:BACKGROUND:Purine nucleotides exhibit various functions in cellular metabolism. Besides serving as building blocks for nucleic acid synthesis, they participate in signaling pathways and energy metabolism. Further, IMP and GMP represent industrially relevant biotechnological products used as flavor enhancing additives i...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/1475-2859-11-138
更新日期:2012-10-24 00:00:00
abstract:BACKGROUND:Amylases are used in various industrial processes and a key requirement for the efficiency of these processes is the use of enzymes with high catalytic activity at ambient temperature. Unfortunately, most amylases isolated from bacteria and filamentous fungi have optimal activity above 45 °C and low pH. For ...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-017-0693-x
更新日期:2017-05-02 00:00:00
abstract:BACKGROUND:Fatty aldehydes are industrially relevant compounds, which also represent a common metabolic intermediate in the microbial synthesis of various oleochemicals, including alkanes, fatty alcohols and wax esters. The key enzymes in biological fatty aldehyde production are the fatty acyl-CoA/ACP reductases (FARs)...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-018-0869-z
更新日期:2018-02-08 00:00:00
abstract:BACKGROUND:Cephalosporin C (CPC) produced by Acremonium chrysogenum is one of the most important drugs for treatment of bacterial infectious diseases. As the major stimulant, methionine is widely used in the industrial production of CPC. In this study, we found methionine stimulated CPC production through enhancing the...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-018-0936-5
更新日期:2018-06-07 00:00:00
abstract:BACKGROUND:Invertase Suc2 was recently identified as a key hydrolase for inulin catabolism in Saccharomyces cerevisiae, whereas the Suc2 activity degrading inulin varies greatly in different S. cerevisiae strains. The molecular mechanism causing such variation remained obscure. The aim of this study is to investigate h...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-015-0243-3
更新日期:2015-04-17 00:00:00
abstract::Phytases are widely utilized in feed industry to increase the utilization of phosphorus, minerals, and amino acids for improvement of animal and human nutrition. At present, all known β-propeller phytases (BPP) have been generated from bacteria, particularly Bacillus. In this work we report for the first time a new fu...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-020-01346-9
更新日期:2020-04-06 00:00:00
abstract:BACKGROUND:The efficiency of biotechnological production processes depends on selecting the best performing microbial strain and the optimal cultivation conditions. Thus, many experiments have to be conducted, which conflicts with the demand to speed up drug development processes. Consequently, there is a great need fo...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/1475-2859-9-86
更新日期:2010-11-13 00:00:00
abstract:: Microbes utilize enzymes to perform a variety of functions. Enzymes are biocatalysts working as highly efficient machines at the molecular level. In the past, enzymes have been viewed as static entities and their function has been explained on the basis of direct structural interactions between the enzyme and the sub...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/1475-2859-5-2
更新日期:2006-01-12 00:00:00
abstract:BACKGROUND:The biocontrol strain Pseudomonas chlororaphis GP72 isolated from the green pepper rhizosphere synthesizes three antifungal phenazine compounds, 2-Hydroxyphenazine (2-OH-PHZ), 2-hydroxy-phenazine-1-carboxylic acid (2-OH-PCA) and phenazine-1-carboxylic acid (PCA). PCA has been a commercialized antifungal pest...
journal_title:Microbial cell factories
pub_type: 杂志文章
doi:10.1186/s12934-016-0529-0
更新日期:2016-07-28 00:00:00