Overproduction of anti-Tn antibody MLS128 single-chain Fv fragment in Escherichia coli cytoplasm using a novel pCold-PDI vector. 2012

Ganesh P Subedi, and Tadashi Satoh, and Shinya Hanashima, and Akemi Ikeda, and Hiroshi Nakada, and Reiko Sato, and Mamoru Mizuno, and Noriyuki Yuasa, and Yoko Fujita-Yamaguchi, and Yoshiki Yamaguchi
Structural Glycobiology Team, Systems Glycobiology Research Group, Chemical Biology Department, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 3510198, Japan.

Overproduction of recombinant proteins in Escherichia coli is often hampered by their failure to fold correctly, leading to their accumulation within inclusion bodies. To overcome the problem, a variety of techniques aimed at soluble expression have been developed including low temperature expression and/or fusion of soluble tags and chaperones. However, a general protocol for bacterial expression of disulfide bond-containing proteins has hitherto not been established. Single chain Fv fragments (scFvs) are disulfide bond-containing proteins often difficult to express in soluble forms in E. coli. We here examine in detail the E. coli expression of a scFv originating from an anti-carbohydrate MLS128 antibody as a model system. We combine three techniques: (1) tagging scFv with thioredoxin, DsbC and protein disulfide isomerase (PDI), (2) expressing the proteins at low temperature using the pCold vector system, and (3) using Origami E. coli strains with mutations in the thioredoxin reductase and glutathione reductase genes. We observed a high expression level of soluble MLS128-scFv in the Origami strain only when PDI is used as a tag. The recombinant protein retains full binding activity towards synthetic carbohydrate antigens. The developed "pCold-PDI" vector has potential for overproduction of other scFvs and disulfide-containing proteins in the Origami strains.

UI MeSH Term Description Entries
D011993 Recombinant Fusion Proteins Recombinant proteins produced by the GENETIC TRANSLATION of fused genes formed by the combination of NUCLEIC ACID REGULATORY SEQUENCES of one or more genes with the protein coding sequences of one or more genes. Fusion Proteins, Recombinant,Recombinant Chimeric Protein,Recombinant Fusion Protein,Recombinant Hybrid Protein,Chimeric Proteins, Recombinant,Hybrid Proteins, Recombinant,Recombinant Chimeric Proteins,Recombinant Hybrid Proteins,Chimeric Protein, Recombinant,Fusion Protein, Recombinant,Hybrid Protein, Recombinant,Protein, Recombinant Chimeric,Protein, Recombinant Fusion,Protein, Recombinant Hybrid,Proteins, Recombinant Chimeric,Proteins, Recombinant Fusion,Proteins, Recombinant Hybrid
D002241 Carbohydrates A class of organic compounds composed of carbon, hydrogen, and oxygen in a ratio of Cn(H2O)n. The largest class of organic compounds, including STARCH; GLYCOGEN; CELLULOSE; POLYSACCHARIDES; and simple MONOSACCHARIDES. Carbohydrate
D003001 Cloning, Molecular The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells. Molecular Cloning
D004926 Escherichia coli A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc. Alkalescens-Dispar Group,Bacillus coli,Bacterium coli,Bacterium coli commune,Diffusely Adherent Escherichia coli,E coli,EAggEC,Enteroaggregative Escherichia coli,Enterococcus coli,Diffusely Adherent E. coli,Enteroaggregative E. coli,Enteroinvasive E. coli,Enteroinvasive Escherichia coli
D005822 Genetic Vectors DNA molecules capable of autonomous replication within a host cell and into which other DNA sequences can be inserted and thus amplified. Many are derived from PLASMIDS; BACTERIOPHAGES; or VIRUSES. They are used for transporting foreign genes into recipient cells. Genetic vectors possess a functional replicator site and contain GENETIC MARKERS to facilitate their selective recognition. Cloning Vectors,Shuttle Vectors,Vectors, Genetic,Cloning Vector,Genetic Vector,Shuttle Vector,Vector, Cloning,Vector, Genetic,Vector, Shuttle,Vectors, Cloning,Vectors, Shuttle
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013879 Thioredoxins Hydrogen-donating proteins that participates in a variety of biochemical reactions including ribonucleotide reduction and reduction of PEROXIREDOXINS. Thioredoxin is oxidized from a dithiol to a disulfide when acting as a reducing cofactor. The disulfide form is then reduced by NADPH in a reaction catalyzed by THIOREDOXIN REDUCTASE. Thioredoxin,Thioredoxin 1,Thioredoxin 2,Thioredoxin-1,Thioredoxin-2
D015295 Antigens, Tumor-Associated, Carbohydrate Carbohydrate antigens expressed by malignant tissue. They are useful as tumor markers and are measured in the serum by means of a radioimmunoassay employing monoclonal antibodies. Antigens, Carbohydrate, Tumor-Associated,CA Antigens,Cancer-Associated Carbohydrate Antigens,Carbohydrate Antigens, Tumor-Associated,Tumor-Associated Carbohydrate Antigens,Antigen, Carcinoma-Associated,CA Antigen,CA(Oxford) Antigen,Carcinoma-Associated Antigen,Epitectin,Antigen, CA,Antigen, Carcinoma Associated,Antigens, CA,Antigens, Cancer-Associated Carbohydrate,Antigens, Tumor-Associated Carbohydrate,Cancer Associated Carbohydrate Antigens,Carbohydrate Antigens, Cancer-Associated,Carbohydrate Antigens, Tumor Associated,Carcinoma Associated Antigen,Tumor Associated Carbohydrate Antigens
D015870 Gene Expression The phenotypic manifestation of a gene or genes by the processes of GENETIC TRANSCRIPTION and GENETIC TRANSLATION. Expression, Gene,Expressions, Gene,Gene Expressions
D057127 Single-Chain Antibodies A form of antibodies consisting only of the variable regions of the heavy and light chains (FV FRAGMENTS), connected by a small linker peptide. They are less immunogenic than complete immunoglobulin and thus have potential therapeutic use. Fv Antibody Fragments, Single-Chain,ScFv Antibodies,Single-Chain Fv,Single-Chain Fv Antibody,Single-Chain Fv Antibody Fragments,Single-Chain Variable Fragment,Single-Chain Variable Fragment Antibodies,Single-Chain Variable Fragment Antibody,Single-Chain Variable Fragments,Antibodies, ScFv,Antibodies, Single-Chain,Antibody, Single-Chain Fv,Fragment, Single-Chain Variable,Fragments, Single-Chain Variable,Fv Antibody Fragments, Single Chain,Fv Antibody, Single-Chain,Fv, Single-Chain,Single Chain Antibodies,Single Chain Fv,Single Chain Fv Antibody,Single Chain Fv Antibody Fragments,Single Chain Variable Fragment,Single Chain Variable Fragment Antibodies,Single Chain Variable Fragment Antibody,Single Chain Variable Fragments,Variable Fragment, Single-Chain,Variable Fragments, Single-Chain

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