Transformations of dimethylsulfide.
Transformations of dimethylsulfide.
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DOI：
10.1007/978-94-017-9269-1_11
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
U. Kappler;H. Schäfer
中科院分区：
文献类型：
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作者：
U. Kappler;H. Schäfer
二甲基硫（DMS）是一种天然存在的化学品，是地球化学硫循环的一部分，并与气候相关的大气过程有关。此外，DMS作为风味化合物存在于土壤环境以及食品中，并且它也可能与疾病状态如口臭有关。二甲硫醚的一个主要环境来源是海藻生物保护剂二甲基磺基丙酸酯。多种细菌酶系统导致从DMSP或二甲亚砜（DMSO）产生DMS或其氧化成例如，DMSO。DMS和DMSO的相互转化是由已经被很好地研究的含有腺嘌呤的金属酶催化的，并且最近还描述了另一种酶系统，一种依赖于NADH的含有黄素的单加氧酶，其从DMS产生甲醛和甲硫醇。DMS转化不限于一组专门的细菌-基于DMS的代谢的证据存在于异养细菌，自养和光养细菌，也有证据表明，这种类型的硫化合物转化发生在藻类。
Dimethylsulfide (DMS) is a naturally occurring chemical that is part of the biogeochemical sulfur cycle and has been implicated in climate-relevant atmospheric processes. In addition, DMS occurs in soil environments as well as in food stuff as a flavor compound and it can also be associated with disease states such as halitosis. A major environmental source of DMS is the marine algal osmoprotectant dimethylsulfoniopropionate (DMSP). A variety of bacterial enzyme systems lead either to the production of DMS from DMSP or dimethylsulfoxide (DMSO) or its oxidation to, e.g., DMSO. The interconversion of DMS and DMSO is catalyzed by molybdenum-containing metalloenzymes that have been very well studied, and recently another enzyme system, an NADH-dependent, flavin-containing monooxygenase, that produces formaldehyde and methanethiol from DMS has also been described.DMS conversions are not limited to a specialized group of bacteria – evidence for DMS-based metabolism exists for heterotrophic, autotrophic and phototrophic bacteria and there is also evidence for the occurrence of this type of sulfur compound conversion in Archaea.