Syntrophic acetate-oxidizing microbes in methanogenic environments

被引：349

作者：

Hattori, Satoshi ^{[1
]}

机构：

[1] Yamagata Univ, Fac Agr, Dept Bioresource Engn, Yamagata 9978555, Japan

来源：

MICROBES AND ENVIRONMENTS | 2008年 / 23卷 / 02期

关键词：

syntrophic acetate oxidation; methanogenesis; reverse acetogenesis; CO dehydrogenase/acetyl-CoA synthase pathway; homoacetogen;

D O I：

10.1264/jsme2.23.118

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：

Acetate is one of the most important intermediates for methanogenesis in the anaerobic mineralization of organic materials. Methanogenic acetate degradation is carried out by either an aceticlastic reaction or an anaerobic acetate-oxidizing reaction. In contrast to the former reaction, the latter is energetically extremely unfavorable. However, the oxidation of acetate can occur with syntrophic interaction between certain bacteria and methanogenic archaea. The bacteria, namely syntrophic acetate-oxidizing bacteria, can oxidize acetate to produce hydrogen/CO2 only when their products are subsequently utilized by the hydrogen-scavenging methanogens. Surprisingly, some of these bacteria can also axenically grow on hydrogen/CO2 to produce acetate. This means that the bacteria can utilize both substrates and products reversibly. This review describes current studies of these curious and fascinating microbes.

引用

页码：118 / 127

页数：10

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