title: [Biosynthesis of chitooligosaccharides by recombinant Escherichia coli].
abstract: Acetyl-N-glucosaminyltransferase gene (nodC) was successfully cloned to Escherichia coli from Mesorhizobium loti. The recombinant E. coli harboring nodC gene was able to synthesize chitooligosaccharides (COs) in MMYNG medium. In optimized condition, a yield of 526 mg/L was obtained after 26 h cultivation in 10 L bioreactor. COs concentration reached up to 4.5% of the cell dry weight. The COs products were purified by charcoal adsorption and Bio-gel P4 chromatography, penta-N-acetylchitopentaose (m/z, 1034[M + H]+) and tetra-N-acetylchitopentaose (m/z, 831 [M + H]+) were identified as the dominating COs product using the method of liquid chromatography-electrospray ionization mass spectrometry (LC-ESI-MS).
authors.affiliation: Shandong Key Laboratory of Microbial Technology, Shandong Academy of Sciences, Jinan 250014, China.
authors.forename: Da-Wei
authors.initials: DW
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Chu
authors.forename: Yong-Ren
authors.initials: YR
authors.lastname: Hao
authors.forename: Ming-Hua
authors.initials: MH
authors.lastname: Li
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D048271:Chitosan / Q000302:isolation & purification / Q000378:metabolism*; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism*; D017351:N-Acetylglucosaminyltransferases / Q000235:genetics / Q000378:metabolism*; D009844:Oligosaccharides / Q000096:biosynthesis* / Q000302:isolation & purification; D011994:Recombinant Proteins / Q000378:metabolism; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D001426:Bacterial Proteins; D009844:Oligosaccharides; D011994:Recombinant Proteins; D048271:Chitosan; D017351:N-Acetylglucosaminyltransferases; C060771:NodC protein, Rhizobiales