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Characterization and Genomic Analysis of a Highly Efficient Dibutyl Phthalate-Degrading Bacterium Gordonia sp Strain QH-12

文献类型： 外文期刊

作者： Jin, Decai 1 ; Kong, Xiao 1 ; Liu, Huijun 2 ; Wang, Xinxin 3 ; Deng, Ye 1 ; Jia, Minghong 2 ; Yu, Xiangyang 4 ;

作者机构： 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, CAS Key Lab Environm Biotechnol, Beijing 100085, Peoples R China

2.Beijing Agr Univ, Beijing Key Lab Detect & Control Spoilage Organis, Beijing 102206, Peoples R China

3.China Offshore Environm Serv Co Ltd, Tianjin 300452, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Food Qual & Safety, Nanjing 210014, Jiangsu, Peoples R China

关键词： phthalate esters;phthalic acid;Gordonia sp;biodegradation;genome sequencing

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2016 年 17 卷 7 期

页码：

收录情况： SCI

摘要： A bacterial strain QH-12 isolated from activated sludge was identified as Gordonia sp. based on analysis of 16S rRNA gene sequence and was found to be capable of utilizing dibutyl phthalate (DBP) and other common phthalate esters (PAEs) as the sole carbon and energy source. The degradation kinetics of DBP under different concentrations by the strain QH-12 fit well with the modified Gompertz model (R-2 > 0.98). However, strain QH-12 could not utilize the major intermediate product phthalate (phthalic acid; PA) as the sole carbon and energy source, and only a little amount of PA was detected. The QH-12 genome analysis revealed the presence of putative hydrolase/esterase genes involved in PAEs-degradation but no phthalic acid catabolic gene cluster was found, suggesting that a novel degradation pathway of PAEs was present in Gordonia sp. QH-12. This information will be valuable for obtaining a more holistic understanding on diverse genetic mechanisms of PAEs-degrading Gordonia sp. strains.

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