Synthesis of GDP-mannose using coupling fermentation of recombinant Escherichia coli. 2011

Jia Honghong, and Lu Fuping, and Li Yu, and Liu Xiaoguang, and Liu Yihan, and Wang Hongbin, and Li Jing, and Cao Yueting
Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China.

Glucokinase (glk), phosphomannomutase (manB), and mannose-1-phosphate guanylytransferase (manC) are needed for the biosynthesis of GDP-mannose. A recombinant E. coli strain over-expressing these three genes was constructed to produce guanosine 5'-diphosphate (GDP)-mannose, the donor of GDP-fucose, an essential substrate for synthesis of fucosyloligosaccharides. In addition, the glk, manB, and manC genes were individually cloned into the expression vector pET-22b (+) to construct three recombinant E. coli strains pET-glk, pET-manB and pET-manC, respectively. Fermentation of the recombinant strain BL21/pET-glk-manB-manC had a conversion rate of 23% from mannose to GDP-mannose under IPTG induction, while coupling fermentation of the three recombinant strains BL21/pET-glk, BL21/pET-manB, BL21/pET-manC resulted in a conversion rate of 33% under the same induction conditions.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D009713 Nucleotidyltransferases A class of enzymes that transfers nucleotidyl residues. EC 2.7.7. Nucleotidyltransferase
D011995 Recombination, Genetic Production of new arrangements of DNA by various mechanisms such as assortment and segregation, CROSSING OVER; GENE CONVERSION; GENETIC TRANSFORMATION; GENETIC CONJUGATION; GENETIC TRANSDUCTION; or mixed infection of viruses. Genetic Recombination,Recombination,Genetic Recombinations,Recombinations,Recombinations, Genetic
D004269 DNA, Bacterial Deoxyribonucleic acid that makes up the genetic material of bacteria. Bacterial DNA
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
D005285 Fermentation Anaerobic degradation of GLUCOSE or other organic nutrients to gain energy in the form of ATP. End products vary depending on organisms, substrates, and enzymatic pathways. Common fermentation products include ETHANOL and LACTIC ACID. Fermentations
D005798 Genes, Bacterial The functional hereditary units of BACTERIA. Bacterial Gene,Bacterial Genes,Gene, Bacterial
D005941 Glucokinase A group of enzymes that catalyzes the conversion of ATP and D-glucose to ADP and D-glucose 6-phosphate. They are found in invertebrates and microorganisms, and are highly specific for glucose. (Enzyme Nomenclature, 1992) EC 2.7.1.2.
D006155 Guanosine Diphosphate Mannose A nucleoside diphosphate sugar which can be converted to the deoxy sugar GDPfucose, which provides fucose for lipopolysaccharides of bacterial cell walls. Also acts as mannose donor for glycolipid synthesis. GDP Mannose,Guanosine Diphosphomannose,Guanosine Pyrophosphate Mannose,Diphosphate Mannose, Guanosine,Diphosphomannose, Guanosine,Mannose, GDP,Mannose, Guanosine Diphosphate,Mannose, Guanosine Pyrophosphate,Pyrophosphate Mannose, Guanosine
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA

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