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绿脓杆菌铁载体绿脓菌素的合成及生物活性

Synthesis and biological activity of pyochelin, a siderophore of Pseudomonas aeruginosa.

作者信息

Ankenbauer R G, Toyokuni T, Staley A, Rinehart K L, Cox C D

机构信息

Department of Microbiology, University of Iowa, Iowa City 52242.

出版信息

J Bacteriol. 1988 Nov;170(11):5344-51. doi: 10.1128/jb.170.11.5344-5351.1988.

Abstract

Pyochelin, a phenolic siderophore of Pseudomonas aeruginosa, was synthesized in three steps from salicylonitrile, L-cysteine, and L-N-methylcysteine. The synthetic product was determined to be identical to natural pyochelin by 1H nuclear magnetic resonance spectroscopy, fast atom bombardment mass spectrometry, chromatographic analysis, and chemical reactivity with FeCl3 and ammoniacal silver nitrate reagent. Synthetic and natural pyochelin promoted bacterial growth in iron-depleted medium and were also found to mediate iron transport by P. aeruginosa to the same levels. Neopyochelin, a stereoisomeric by-product of the synthesis, showed less biological activity than did pyochelin in iron transport assays.

摘要

绿脓菌素是铜绿假单胞菌的一种酚类铁载体,由水杨腈、L-半胱氨酸和L-N-甲基半胱氨酸分三步合成。通过1H核磁共振光谱、快原子轰击质谱、色谱分析以及与FeCl3和氨性硝酸银试剂的化学反应性,确定合成产物与天然绿脓菌素相同。合成的绿脓菌素和天然绿脓菌素在缺铁培养基中均能促进细菌生长,并且还发现它们介导铜绿假单胞菌的铁转运至相同水平。新绿脓菌素是合成过程中的一种立体异构副产物,在铁转运试验中显示出比绿脓菌素更低的生物活性。

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