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关于[a]二烯被Bacillus sp.降解途径的研究菌株M1是一种M1菌株

Xiaoxue Zhang^1,2, Guohui Ning¹, Mingyue Qi¹

¹State Key Laboratory of North China Crop Improvement and Regulation, Ministry of Education of China-Hebei Province Joint Innovation Center for Efficient Green Vegetable Industry, Hebei Agricultural University, Baoding, China.

Frontiers in microbiology

|September 24, 2025

概括

巴西勒斯种类 (Bacillus sp.) 的存在菌株M1使用各种碳来源有效降解[a]烯 (BaP). 研究人员阐明了一种涉及特定酶的新型BaP降解途径,并确定了新的中间代谢物.

科学领域:

环境微生物学环境微生物学
生物修复是一种生物修复.
生物化学生物化学

背景情况:

多环芳 (PAH),如 (BaP),是持久的环境污染物.
微生物降解提供了一种有希望的策略,用于修复BAP污染的场所.
巴西勒斯种类 (Bacillus sp.) 的存在以前从受污染的土壤中分离出来的M1菌株表现出显著的BaP降解能力.

研究的目的:

为了研究Bacillus sp.的代谢多功能性. 菌株M1在使用各种芳香化合物.
为了确定中间代谢物,并阐明BaP的降解路径由菌株M1.1.
为了证明特定细胞内酶在BaP降解过程中的作用.

主要方法:

培养Bacillus sp.的种植方式菌株M1使用不同的鞋底碳来源,包括BaP.
气相色谱-质谱 (GC-MS) 用于识别中间代谢物.
酶测试用于确定参与芳香化合物代谢的关键细胞内酶的活性.

主要成果:

巴西勒斯种类 (Bacillus sp.) 的存在菌株M1作为唯一的碳来源有效地利用了酸,原酸,酸,甲基醇和甘酸 (65.50-92.28%利用率在2天内).
在GC-MS分析中,发现了中间代谢物,包括4,5-二甲基南,9-乙基-10-甲基南,2-乙基拉基丁,甲酸衍生物,化甲基醇和酸.
酸二氧化酶,酸盐氧化酶,甲基醇二氧化酶,甘酸二氧化酶和脱酶的酶活性与BaP降解水平相关.

结论:

一个新的降解途径为BaP由Bacillus sp. 提出了M1菌株,通过对C-9/C-10或C-7/C-8键的酶攻击来启动.
该途径涉及关键中间体,如cis-4,5-pyrene二二醇和4,5-dimethyl phenanthrene,导致1-hydroxy-2-naphthalic 酸.
发现了两种新的BaP代谢物,9 - 乙基-10 - 甲基和2 - 乙基,扩大了对微生物PAH代谢的理解.

关键词:

细菌杆菌是一种子[a]二烯的降解分解关键的酶关键的酶代谢过程中的代谢.酸路径的酸路径

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