title: On-line identification of 4''-isovalerylspiramycin I in the genetic engineered strain of S. spiramyceticus F21 by liquid chromatography with electrospray ionization tandem mass spectrometry, ultraviolet absorbance detection and nuclear magnetic resonance spectrometry.
abstract: LC-hyphenated techniques were applied to the on-line identification of isovalerylspiramycin I (isp I), a spiramycin-like macrolide in the crude extract of fermentation broth from a genetically engineered strain of S. spiramyceticus F21. In the structural characterization of the large molecular secondary metabolite of isp I, LC-DAD-UV-ESI-MS(n) analysis played a crucial role, and stop-flow LC-(1)H NMR measurement, with bitespiramycin used as reference, was a valuable complement approach. This rational approach proved to be an efficient means for the rapid and accurate structural determination of known microbial secondary metabolites, by which targeted isolation of component(s) of interest can be subsequently performed for further biological and pharmacological studies in drug development.
authors.affiliation: Key Laboratory of Biotechnology of Antibiotics, Ministry of Health, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100050, China.
authors.forename: Jingyan
authors.initials: J
authors.lastname: Li
authors.forename: Chunyan
authors.initials: C
authors.lastname: Ma
authors.forename: Hongyuan
authors.initials: H
authors.lastname: Wang
authors.forename: Yinghong
authors.initials: Y
authors.lastname: Wang
authors.forename: Linzhuan
authors.initials: L
authors.lastname: Wu
authors.forename: Yiguang
authors.initials: Y
authors.lastname: Wang
mesh_terms: D002853:Chromatography, Liquid / Q000191:economics / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy / Q000191:economics / Q000379:methods*; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000191:economics / Q000379:methods*; D015572:Spiramycin / Q000031:analogs & derivatives* / Q000032:analysis; D013302:Streptomyces / Q000737:chemistry* / Q000235:genetics; D053719:Tandem Mass Spectrometry / Q000191:economics / Q000379:methods; D013997:Time Factors
chemical_list: D015572:Spiramycin; C423662:carrimycin