A NON-PASSIVE MECHANISM OF BUTYRATE EXCRETION OPERATES DURING ACIDOGENIC FERMENTATION OF METHANOL BY EUBACTERIUM-LIMOSUM

被引：14

作者：

LOUBIERE, P ^{[1
]}

GOMA, G ^{[1
]}

LINDLEY, ND ^{[1
]}

机构：

[1] INST NATL SCI APPL,CTBM,CNRS,UA 544,DEPT GENIE BIOCHIM & ALIMENTAIRE,AVE RANGUEIL,F-31077 TOULOUSE,FRANCE

来源：

ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY | 1990年 / 57卷 / 02期

关键词：

acidogenesis; butyrate efflux; Eubacterium limosum; intracellular metabolite concentrations; methanol;

D O I：

10.1007/BF00403159

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

The inhibitory effects of organic acids produced as fermentation end-products during methylotrophic growth of the acidogenic anaerobe, Eubacterium limosum have been investigated. Precise quantification of the intracellular concentrations of acetate and butyrate, together with ΔpH measurements indicate that butyrate efflux cannot be explained by a process of passive diffusion. Intracellular concentrations of butyrate were significantly lower than those of the culture broth. It is argued that growth inhibition by butyrate is due to energetic limitations resulting from the energy drain associated with this non-passive efflux mechanism. © 1990 Kluwer Academic Publishers.

引用

页码：83 / 89

页数：7

共 15 条

[1]

Bajpai R.K., 1988, HDB ANAEROBIC FERMEN, P207

[2] UNCOUPLING BY ACETIC-ACID LIMITS GROWTH OF AND ACETOGENESIS BY CLOSTRIDIUM-THERMOACETICUM [J].