Butler Alison, Theisen Roslyn M
Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106-9510, United States.
Coord Chem Rev. 2010 Feb 1;254(3-4):288-296. doi: 10.1016/j.ccr.2009.09.010.
Two remarkable features of many siderophores produced by oceanic bacteria are the prevalence of an α-hydroxy-carboxylic acid functionality either in the form of the amino acid β-hydroxy aspartic acid or in the form of citric acid, as well as the predominance of amphiphilic siderophores. This review will provide an overview of the photoreactivity that takes place when siderophores containing β-hydroxy aspartic acid and citric acid are coordinated to iron(III). This photoreactivity raises questions about the role of this photochemistry in microbial iron acquisition as well as upper-ocean iron cycling. The self-assembly of amphiphilic siderophores and the coordination-induced phase-change of the micelle-to-vesicle transformation will also be reviewed. The distinctive photosensitive and self-assembly properties of marine siderophores hint at possibly new microbial iron acquisition mechanisms.
海洋细菌产生的许多铁载体有两个显著特征,一是普遍存在α-羟基羧酸官能团,其形式为氨基酸β-羟基天冬氨酸或柠檬酸,二是两亲性铁载体占主导地位。本综述将概述当含有β-羟基天冬氨酸和柠檬酸的铁载体与铁(III)配位时发生的光反应性。这种光反应性引发了关于这种光化学在微生物铁获取以及海洋上层铁循环中作用的问题。两亲性铁载体的自组装以及胶束到囊泡转变的配位诱导相变也将被综述。海洋铁载体独特的光敏和自组装特性暗示了可能存在新的微生物铁获取机制。