细菌的核酮糖单磷酸途径与甲醛同化作用

Bacterial ribulose monophosphate pathway and formaldehyde assimilation

摘要:

酮糖单磷酸途径最初在甲基营养菌中发现,现在被认为是在细菌中广泛存在的和甲醛同化作用及脱毒相关的一条途径,该途径的关键酶是6-磷酸己酮糖合成酶和6-磷酸己酮糖异构酶。文章将介绍来源于各种细菌的核酮糖单磷酸途径的生理作用及其两个关键酶基因的组织结构、表达调控机制与应用前景。

关键词:甲基营养菌; 核酮糖单磷酸途径; 甲醛同化作用

Abstract:

Ribulose monophosphate pathway (RuMP), which was originally found in methylotrophic bacteria, is now recognized as a metabolic pathway widespread in most bacteria and involved in formaldehyde assimilation and detoxification. 3-Hexulose-6-phosphate synthase (HPS) and 6-phospho-3-hexuloisomerase (PHI) are the key enzymes of this pathway. This review describes the physiological significance of RuMP pathway derived from a variety of bacteria, the organizations and expressional regulations of HPS and PHI genes and the perspectives for applications of the two genes.

Key words:Methylotrophic bacteria; Ribulose monophosphate pathway; Formaldehyde assimilation