Abstract:
BACKGROUND:Over-expressed native or recombinant proteins are commonly used for industrial and pharmaceutical purposes, as well as for research. Proteins of interest need to be purified in sufficient quantity, quality and specific activity to justify their commercial price and eventual medical use. Proteome quality was previously positively correlated with ribosomal fidelity, but not on a single protein level. Here, we show that decreasing translational error rate increases the activity of single proteins. In order to decrease the amount of enzyme needed for catalysis, we propose an expression system bearing rpsL141 mutation, which confers high ribosomal fidelity. Using alpha-glucosidase (exo-alpha-1,4-glucosidase) and beta-glucanase (beta-D-glucanase) as examples, we show that proteins purified from Escherichia coli bearing rpsL141 mutation have superior activity compared to those purified from wild type E. coli, as well as some commercially available industrial enzymes. RESULTS:Our results indicate that both alpha-glucosidase and beta-glucanase isolated from E. coli bearing rpsL141 mutation have increased activity compared to those isolated from wild type E. coli. Alpha-glucosidase from rpsL141 background has a higher activity than the purchased enzymes, while beta-glucanase from the same background has a higher activity compared to the beta-glucanase purchased from Sigma, but not compared to the one purchased from Megazyme. CONCLUSION:Reduction of the error rate in protein biosynthesis via ribosomal rpsL141 mutation results in superior functionality of single proteins. We conclude that this is a viable system for expressing proteins with higher activity and that it can be easily scaled up and combined with other expression systems to meet the industrial needs.
journal_name
BMC Biotechnoljournal_title
BMC biotechnologyauthors
Musa M,Radman M,Krisko Adoi
10.1186/s12896-016-0259-8subject
Has Abstractpub_date
2016-03-11 00:00:00pages
28issn
1472-6750pii
10.1186/s12896-016-0259-8journal_volume
16pub_type
杂志文章abstract:BACKGROUND:Understanding and manipulating gene function in physiological conditions is a major objective for both fundamental and applied research. In contrast to other experimental settings, which use either purely genetic or gene delivery (viral or non-viral) strategies, we report here a strategy based on direct prot...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-9-40
更新日期:2009-04-24 00:00:00
abstract:BACKGROUND:Polymerase chain reaction (PCR) is one of the most important developments in modern biotechnology. However, PCR is known to introduce biases, especially during multiplex reactions. Recent studies have implicated the DNA polymerase as the primary source of bias, particularly initiation of polymerization on th...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-14-10
更新日期:2014-01-30 00:00:00
abstract:BACKGROUND:Chinese hamster ovary (CHO) cells have become the host of choice for the production of recombinant proteins, due to their capacity for correct protein folding, assembly, and posttranslational modifications. The most widely used system for recombinant proteins is the gene amplification procedure that uses the...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-015-0218-9
更新日期:2015-10-23 00:00:00
abstract:BACKGROUND:More than a dozen of fungal immunomodulatory proteins (FIPs) have been identified to date, most of which are from Ganoderma species. However, little is known about the similarities and differences between different Ganoderma FIPs' bioactivities. In the current study, two FIP genes termed FIP-gap1 and FIP-gap...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-018-0488-0
更新日期:2018-12-14 00:00:00
abstract:BACKGROUND:Expressed Sequence Tag (EST) sequences are widely used in applications such as genome annotation, gene discovery and gene expression studies. However, some of GenBank dbEST sequences have proven to be "unclean". Identification of cDNA termini/ends and their structures in raw ESTs not only facilitates data qu...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-12-16
更新日期:2012-05-03 00:00:00
abstract:BACKGROUND:Eleven new human polyomaviruses (HPyVs) have been identified in the last decade. Serological studies show that these novel HPyVs sub-clinically infect humans at an early age. The routes of infection, entry pathways, and cell tropism of new HPyVs remain unknown. VP1 proteins of polyomaviruses can assembly int...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-015-0187-z
更新日期:2015-08-04 00:00:00
abstract:BACKGROUND:Anti-NMDA receptor encephalitis (ANRE) is a potentially lethal disease attributed to auto-antibodies against the N-methyl-D-aspartate receptor (NMDAR). Full recovery is possible if therapy is initiated early in the disease course. Detection of ANRE antibodies in the cerebrospinal fluid (CSF) is essential for...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-018-0450-1
更新日期:2018-06-27 00:00:00
abstract:BACKGROUND:Plasminogen activator inhibitor type-2 (PAI-2, SERPINB2) is an irreversible, specific inhibitor of the urokinase plasminogen activator (uPA). Since overexpression of uPA at the surface of cancer cells is linked to malignancy, targeting of uPA by exogenous recombinant PAI-2 has been proposed as the basis of p...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-9-43
更新日期:2009-05-14 00:00:00
abstract:BACKGROUND:The therapeutic use of α-amidated peptides (e.g. calcitonin, glucagon-like peptide) has increased dramatically, but there are major impediments to wider use of such peptides. Larger peptides are expensive to synthesize, and short plasma half-lives frequently limit the clinical circumstances in which the pept...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-015-0173-5
更新日期:2015-06-27 00:00:00
abstract:BACKGROUND:The CRISPR/Cas9 genome editing system has greatly facilitated and expanded our capacity to engineer mammalian genomes, including targeted gene knock-outs. However, the phenotyping of the knock-out effect requires a high DNA editing efficiency. RESULTS:Here, we report a user-friendly strategy based on the ex...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-016-0250-4
更新日期:2016-02-16 00:00:00
abstract:BACKGROUND:Interleukin-17 (IL-17), the characteristic cytokine secreted by T helper 17 lymphocytes (Th17 cells), plays a pivotal role in host defense and many inflammatory or autoimmune diseases. The aim of this study was to obtain purified protein caprine IL-17A (cIL-17A) as an antigen for preparing an IL-17A-specific...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-019-0543-5
更新日期:2019-07-17 00:00:00
abstract:BACKGROUND:Heparan sulfate glycosaminoglycans are diverse components of certain proteoglycans and are known to interact with growth factors as a co-receptor necessary to induce signalling and growth factor activity. In this report we characterize heterogeneously glycosylated recombinant human perlecan domain 1 (HSPG2 a...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-10-66
更新日期:2010-09-09 00:00:00
abstract:BACKGROUND:The presence of coliform bacteria is routinely assessed to establish the microbiological safety of water supplies and raw or processed foods. Coliforms are a group of lactose-fermenting Enterobacteriaceae, which most likely acquired the lacZ gene by horizontal transfer and therefore constitute a polyphyletic...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-015-0168-2
更新日期:2015-06-04 00:00:00
abstract:BACKGROUND:There are significant differences in the culture conditions between small-scale screenings and large-scale fermentation processes. Production processes are usually conducted in fed-batch cultivation mode with active pH-monitoring and control. In contrast, screening experiments in shake flasks are usually con...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-11-25
更新日期:2011-03-23 00:00:00
abstract:BACKGROUND:Ligand-targeted approaches have proven successful in improving the therapeutic index of a number of drugs. We hypothesized that the specific targeting of TNF-alpha antagonists to inflamed tissues could increase drug efficacy and reduce side effects. RESULTS:Using uteroglobin (UG), a potent anti-inflammatory...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-11-104
更新日期:2011-11-10 00:00:00
abstract:BACKGROUND:Methylated CpG dinucleotides in promoters are associated with the loss of gene expression in recombinant Chinese hamster ovary (CHO) cells during large-scale commercial manufacturing. We evaluated a promoter devoid of CpG dinucleotides, CpGfree, in parallel with a similar CpG containing promoter, CpGrich, fo...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-016-0300-y
更新日期:2016-10-18 00:00:00
abstract:BACKGROUND:Shark heavy chain antibody, also called new antigen receptor (NAR), consists of one single Variable domain (VH), containing only two complementarity-determining regions (CDRs). The antigen binding affinity and specificity are mainly determined by these two CDRs. The good solubility, excellent thermal stabili...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-7-78
更新日期:2007-11-19 00:00:00
abstract:BACKGROUND:Ultrasound and microbubbles (USMB) have been shown to enhance the intracellular uptake of molecules, generally thought to occur as a result of sonoporation. The underlying mechanism associated with USMB-enhanced intracellular uptake such as membrane disruption and endocytosis may also be associated with USMB...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-017-0364-3
更新日期:2017-05-18 00:00:00
abstract:BACKGROUND:Oleaginous yeast species are an alternative for the production of lipids or triacylglycerides (TAGs). These yeasts are usually non-pathogenic and able to store TAGs ranging from 20 % to 70 % of their cell mass depending on culture conditions. TAGs originating from oleaginous yeasts can be used as the so-call...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-016-0276-7
更新日期:2016-05-27 00:00:00
abstract:BACKGROUND:Nanoparticles appear to be promising devices for application in the agriculture and food industries, but information regarding the response of plants to contact with nano-devices is scarce. Toxic effects may be imposed depending on the type and concentration of nanoparticle as well as time of exposure. A num...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-13-111
更新日期:2013-12-20 00:00:00
abstract:BACKGROUND:Waste animal fat is a promising feedstock to replace vegetable oil that widely used in commercial biodiesel process, however the high content of free fatty acid in waste fat makes it unfeasible to be processed with commercial base-catalytic process. Enzymatic process is preferable to convert waste fat into b...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-017-0390-1
更新日期:2017-09-09 00:00:00
abstract:BACKGROUND:Mesenchymal stem cells (MSCs) are an attractive source of adult stem cells for therapeutic application in clinical study. Genetic modification of MSCs with beneficial genes makes them more effective for therapeutic use. However, it is difficult to transduce genes into MSCs by common transfection methods, esp...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-10-38
更新日期:2010-05-13 00:00:00
abstract:BACKGROUND:The antiphospholipid syndrome (APS), characterised by recurrent miscarriage and thrombosis, is a significant cause of morbidity and mortality. Domain I (DI) of human beta 2 glycoprotein I (beta2GPI) is thought to contain crucial antibody binding epitopes for antiphospholipid antibodies (aPL), which are criti...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-6-8
更新日期:2006-02-10 00:00:00
abstract:BACKGROUND:Xenoantigens are a major source of concern with regard to the success of interspecific xenografts. GGTA1 encodes α1,3-galactosyltransferase, which is essential for the biosynthesis of galactosyl-alpha 1,3-galactose, the major xenoantigen causing hyperacute rejection. GGTA1-modified pigs, therefore, are promi...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-020-00638-7
更新日期:2020-08-18 00:00:00
abstract:BACKGROUND:Iron is an essential element in several pathways of microbial metabolism, and therefore low iron toxicity is expected on the usage of Fe nanoparticles (NPs). This study aims to determine the effect of Fe NPs on biosurfactant production by marine actinobacterium Nocardiopsis sp. MSA13A under solid state cultu...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-14-48
更新日期:2014-05-21 00:00:00
abstract:BACKGROUND:Hydrophobic polystyrene is the most common material for solid phase immunoassay. Proteins are immobilized on polystyrene by passive adsorption, which often causes considerable denaturation. Biological macromolecules were found to better retain their functional activity when immobilized on hydrophilic materia...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-1-4
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:The ability to produce the same recombinant protein in both prokaryotic and eukaryotic cells offers many experimental opportunities. However, the cloning of the same gene into multiple plasmids is required, which is time consuming, laborious and still may not produce soluble, stable protein in sufficient qua...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/1472-6750-12-54
更新日期:2012-08-23 00:00:00
abstract:BACKGROUND:Multi-copy gene integration into microbial genomes is a conventional tool for obtaining improved gene expression. For Penicillium chrysogenum, the fungal producer of the beta-lactam antibiotic penicillin, many production strains carry multiple copies of the penicillin biosynthesis gene cluster. This discover...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-017-0335-8
更新日期:2017-02-16 00:00:00
abstract:BACKGROUND:At first glance, there appears to be a high degree of similarity between the metabolism of yeast (the Crabtree effect) and human cancer cells (the Warburg effect). At the root of both effects is accelerated metabolic flow through glycolysis which leads to overflows of ethanol and lactic acid, respectively. I...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-017-0362-5
更新日期:2017-05-08 00:00:00
abstract:BACKGROUND:CRISPR/Cas9 is widely used for precise genetic editing in various organisms. CRISPR/Cas9 editing may in many plants be hampered by the presence of complex and high ploidy genomes and inefficient or poorly controlled delivery of the CRISPR/Cas9 components to gamete cells or cells with regenerative potential. ...
journal_title:BMC biotechnology
pub_type: 杂志文章
doi:10.1186/s12896-019-0530-x
更新日期:2019-06-17 00:00:00