期刊
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
卷 99, 期 6, 页码 2773-2781出版社
SPRINGER
DOI: 10.1007/s00253-014-6216-3
关键词
Methyl-accepting chemotaxis proteins (MCPs); cis-Aconitate; Chemoreceptor; Tricarboxylic acid (TCA) cycle; Aromatic compounds; Comamonas testosteroni CNB-1; MCP2983
资金
- National Natural Science Foundation of China [31230003]
Comamonas testosteroni CNB-1 behaves chemotactically toward a wide range of organic compounds, and 19 methyl-accepting chemotaxis proteins (MCPs) were annotated from the genome of strain CNB-2, a plasmid-curing derivative from strain CNB-1. The MCP-free mutant CNB-1 Delta 20 completely lost its chemotactic responses. In this study, we found that a chemoreceptor, namely MCP2983, restored chemotactic responses toward nine carboxylic acids and ten aromatic compounds to CNB-1 Delta 20. Isothermal titration calorimetry analysis indicated that the ligand-binding domain (LBD) of MCP2983 specifically binds to cis-aconitate but not other tested compounds. Deletion of the LBD of MCP2983 impaired chemotactic responses toward cis-aconitate as well as other tested compounds, indicating that the LBD of MCP2983 was essential for triggering chemotactic responses. Five amino acid residues (M-81, S-156, E-157, I-158, and L-159) that are located at a putative ligand-binding pocket were identified to be involved in binding to cis-aconitate. So far, the MCP2983 represents the sole biochemically identified chemoreceptor that specifically binds to cis-aconitate and is able to trigger chemotaxis towards diverse organic compounds.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据