期刊
FEMS MICROBIOLOGY REVIEWS
卷 27, 期 2-3, 页码 165-181出版社
OXFORD UNIV PRESS
DOI: 10.1016/S0168-6445(03)00050-0
关键词
metallothionem; metallochaperone; P-1-type ATPase; thylakoid copper; Synechocystis PCC 6803; Synechococcus PCC 7942
类别
Homeostatic systems for essential and non-essential metals create the cellular environments in which the correct metals are acquired by metalloproteins while the incorrect ones are somehow avoided. Cyanobacteria have metal requirements often absent from other bacteria; copper in thylakoidal plastocyanin, zinc in carboxysomal carbonic anhydrase, cobalt in cobalamin but magnesium in chlorophyll, molybdenum in heterocystous nitrogenase, manganese in thylakoidal water-splitting oxygen-evolving complex. This article reviews: an intracellular trafficking pathway for inward copper supply, the sequestration of surplus zinc by. metallothionein (also present in other bacteria) and the detection and export of excess cobalt. We consider the influence of homeostatic proteins on selective metal availability. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
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