The aim of this study was to produce a recombinant protein consisting of the catalytic and translocation domains of diphtheria toxin for its later application as a vaccine candidate against Corynebacterium diphtheria. To achieve this goal, at first, the amino acid sequence of DT386 was used for prediction of T and B cell epitopes using on-line servers. The DT386 coding sequence was synthesized ...

BACKGROUND Extracellular expression of proteins has an absolute advantage in a large-scale industrial production. In our previous study, Thermobifida fusca cutinase, an enzyme mainly utilized in textile industry, was expressed via type II secretory system in Escherichia coli BL21(DE3), and it was found that parts of the expressed protein was accumulated in the periplasmic space. Due to the fact...

BACKGROUND Solar energy is the ultimate energy source on the Earth. The conversion of solar energy into fuels and energy sources can be an ideal solution to address energy problems. The recent discovery of proteorhodopsin in uncultured marine γ-proteobacteria has made it possible to construct recombinant Escherichia coli with the function of light-driven proton pumps. Protons that translocate a...

BACKGROUND Peptides are increasingly used in industry as highly functional materials. Bacterial production of recombinant peptides has the potential to provide large amounts of renewable and low cost peptides, however, achieving high product titers from Chemically Defined Media (CDM) supplemented with simple sugars remains challenging. RESULTS In this work, the short peptide surfactant, DAMP4...

Introduction: Pathogenic strains of Proteus mirabilis have important roles in urinary tract infection. Proteus toxic agglutinin (Pta) is amongst the most important virulence factors of P. mirabilis. This protein has a conserved sequence present in all the strains which could be evaluated as a novel vaccine target against them. The aims of the current study were the expression, purification and ...

E. coli O157:H7, one of the major EHEC serotypes, is capable of developing bloody diarrhea, hemorrhagic colitis (HC), and fatal hemolytic uremic syndrome (HUS) and is accompanied by high annual economic loss worldwide. Due to the increased risk of HC and HUS development following antibiotic therapy, the prevention of infections caused by this pathogen is considered to be one of the most effecti...

BACKGROUND Escherichia coli is, to date, the most used microorganism for the production of recombinant proteins and biotechnologically relevant metabolites. High density cell cultures allow efficient biomass and protein yields. However, their main limitation is the accumulation of acetate as a by-product of unbalanced carbon metabolism. Increased concentrations of acetate can inhibit cellular g...

BACKGROUND α-Pinene is an important natural product that is widely used in flavorings, fragrances, medicines, fine chemicals and high-density renewable fuels. Currently, α-Pinene used in industry is mainly produced either by tapping trees (gum turpentine) or as a byproduct of paper pulping (crude sulfate turpentine, CST). However, the extraction of it from trees is tedious and inefficient and r...

4-Hydroxy benzylideneacetone (4-HBA) is an organic synthesis intermediate and can be used as a precursor for the of raspberry ketone. Herein, 2-deoxy-D-ribose 5-phosphate aldolase (DERA) was overexpressed in E. coli BL21 (DE3) attractive catalyst enzymatic aldol reactions. The reaction between 4-hydroxybenzaldehyde (4-HBD) acetone to biosynthesize 4-HBA catalyzed by whole-cell (pRSF-Deoc). yiel...

Abstract Electron‐rich phenolic substrates can be derived from the depolymerisation of lignin feedstocks. Direct biotransformations hydroxycinnamic acid monomers obtained exploited to produce high‐value chemicals, such as α‐amino acids, however reaction is often hampered by chemical autooxidation in alkaline or harsh media. Regioselective O ‐methyltransferases (OMTs) are ubiquitous enzymes natu...