Structural insights into diversity and n-alkane biodegradation mechanisms of alkane hydroxylases.

Structural insights into diversity and n-alkane biodegradation mechanisms of alkane hydroxylases.
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烷烃羟化酶多样性和正烷烃生物降解机制的结构见解

DOI:
10.3389/fmicb.2013.00058
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发表时间:
2013
影响因子:
5.2
通讯作者:
Bartlam M
Bartlam M
中科院分区:
生物学2区
文献类型:
--
作者:
Ji Y;Mao G;Wang Y;Bartlam M

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环境微生物利用四种降解途径氧化正构烷烃。虽然不同微生物中降解正构烷烃的酶可能不同,但在烷烃好氧降解的第一步中起作用的酶都属于烷烃羟化酶。烷烃羟化酶是一类根据酶的类型将衍生自分子氧的氧原子插入烷烃末端(或多个末端)的不同位点的酶。在这篇综述中,我们总结了不同类型的烷烃羟化酶,它们的降解步骤,并比较了典型的酶从不同的类关于他们的三维结构,以提供洞察酶如何介导其不同的作用,在降解正构烷烃和什么决定了他们不同的底物范围。通过以上分析,可以阐明酶的降解机理,并利用分子生物学方法拓展酶在石油化工或石油污染环境生物修复中的催化作用。
Environmental microbes utilize four degradation pathways for the oxidation of n-alkanes. Although the enzymes degrading n-alkanes in different microbes may vary, enzymes functioning in the first step in the aerobic degradation of alkanes all belong to the alkane hydroxylases. Alkane hydroxylases are a class of enzymes that insert oxygen atoms derived from molecular oxygen into different sites of the alkane terminus (or termini) depending on the type of enzymes. In this review, we summarize the different types of alkane hydroxylases, their degrading steps, and compare typical enzymes from various classes with regard to their three-dimensional structures, in order to provide insights into how the enzymes mediate their different roles in the degradation of n-alkanes and what determines their different substrate ranges. Through the above analyzes, the degrading mechanisms of enzymes can be elucidated and molecular biological methods can be utilized to expand their catalytic roles in the petrochemical industry or in bioremediation of oil-contaminated environments.
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