趋磁细菌的特点及其纳米磁小体的合成条件

›› 2007, Vol. 9 ›› Issue (3): 24-31.

趋磁细菌的特点及其纳米磁小体的合成条件

姜伟田杰生李颖李季伦

中国农业大学生物学院,北京100094

收稿日期:2007-04-30 出版日期:2007-06-15 发布日期:2009-10-16
通讯作者: 通讯作者李季伦，中国科学院院士，主要从事趋磁细菌、生物固氮、抗生素等方面的研究工作。
作者简介:姜伟|副教授|主要从事有关趋磁细菌的研究工作。E-mall：jiangwei1099@yahoo．com．cn
基金资助:
国家自然科学基金（30570023）和国家“863”计划（2006AA022233）资助

Characteristics of Magnetotactic Bacteria and Biosynthesis Conditions of |Nano-magnetosomes

JIANG Wei, TIAN Jie-sheng, LI Ying, LI Ji-lun

College of Biological Sciences, China Agricultural University, Beijing 100094, China

Received:2007-04-30 Online:2007-06-15 Published:2009-10-16

摘要/Abstract

摘要：

综述了趋磁细菌及其胞内纳米磁小体的特性，评述了趋磁细菌磁小体形成的条件及影响因素。在分析趋磁细菌大量培养和影响磁小体形成因素的基础上，指出了细胞培养和磁小体产量提高所存在的问题及解决途径。提出了趋磁细菌形成磁小体的机制和生理意义的假说：大量Fe^2＋运入细胞是在低氧浓度的胁迫下，以Fe^＋2作为电子最终受体呼吸并跨膜转运的结果；避免大量进入细胞的Fe^2＋对自身的毒害作用是其进一步转化为Fe3O4原因；提出在细胞膜内表面形成Fe3O4并包裹等新观点。

关键词: 趋磁细菌磁小体合成

Abstract:

Characteristics of magnetotactic bacteria and magnetosomes were summarized in this paper. Conditions and affecting factors for magnetosomes formation were reviewed. Problems for mass culture of magnetotactic bacteria and enhancement of magnetosomes yields were indicated. Methods to resolve these problems were proposed. A hypothesis involved in mechanism and physiological function of magnetosomes formation was suggested. Ferrous irons were transported into magnetotactic bacteria cells resulted in ferric iron transportation through membranes as electron acceptors under stresses of low oxygen levels. It is to avoid cytotoxicity of ferrous iron and further transform to Fe3O4 on surface of inner membrane the reason of magnetosome formation.

Key words: magnetotactic bacteria, biosynthesis of magnetosomes

中图分类号:

Q939.1

姜伟田杰生李颖李季伦. 趋磁细菌的特点及其纳米磁小体的合成条件[J]. , 2007, 9(3): 24-31.

JIANG Wei, TIAN Jie-sheng, LI Ying, LI Ji-lun . Characteristics of Magnetotactic Bacteria and Biosynthesis Conditions of |Nano-magnetosomes[J]. , 2007, 9(3): 24-31.