ATP requirements for growth and maintenance of iron-oxidizing bacteria

被引：10

作者：

Mignone, C ^{[1
]}

Donati, ER ^{[1
]}

机构：

[1] Natl Univ La Plata, Fac Ciencias Exactas, CONICET, CINDEFI, RA-1900 La Plata, Argentina

来源：

BIOCHEMICAL ENGINEERING JOURNAL | 2004年 / 18卷 / 03期

关键词：

chemoutotrophes; microbial growth; physiology; modeling; iron-oxidizing bacteria; bioenergetics;

D O I：

10.1016/j.bej.2003.08.010

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

A simple metabolic model of ferrous oxidizing bacteria based on biochemically structured balances of ATP and NAD(P)H is proposed in order to calculate maximum yield and maintenance on ATP. Similar values of growth yield and maintenance were obtained using data of ferrous iron and/or oxygen consumption in Acidithiobacillus ferrooxidans cultures on iron under different conditions. When pyrite was the sole energy source, growth yield was higher suggesting cells could obtain energy through the sulfur compounds oxidation. Values of growth yields for Leptospirillum ferrooxidans cultures on iron were a bit lower than those obtained for A. ferrooxidans although within the experimental errors. The maintenance coefficients on ATP for both bacteria were similar and comparable to those observed in heterotrophic microorganisms. This fact is really surprising taking in account the high proton gradient that this kind of microorganisms should maintain. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：211 / 216

页数：6

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